top of page

Runna Post-Run Stats Explained: What Every Metric Means (And Which Ones I Actually Look At)

Sep 2
23 min read

Updated: Oct 13

Andy Hood runner and founder of running blog runningwestwardho

Written by Andy Hood · Ultra runner, cancer survivor and Runna ambassador

Published 2 September 2026


Article includes affiliate codes that support this blog and my cancer charity work.


Runna app post-run overview screen on iPhone
Runna's post-run breakdown. Useful, as long as you know which bits to read.

You finish your run, stop the watch, and Runna asks how it went. Thumbs up if the workout worked, thumbs down if it didn't. A few seconds later you get your AI feedback, a compliment where it went well and some hard advice where it didn't. Then the overview: distance, time, average pace, elevation gain, average heart rate, cadence and calories burnt. Scroll on and there's your Best Efforts for the run, then a wall of graphs.


Laps. Splits. Pace. Elevation. Heart Rate. Heart Rate Zones. And behind a button marked More Analysis, five more you may never have heard of.

Runna, like most running apps, gives you a myriad of numbers to mull over. The question is which ones are useful, which you should look at after every run, and which you can scroll past. That isn't a one-line answer, so in this article I'll take each metric in turn, explain what it's telling you in plain English, and say who it's useful for. I'll also be completely honest about which ones I look at, and why the rest get a "that's nice" and a swipe.


I've trained with Runna through rebuilding after cancer and again after emergency surgery earlier this year. I run with an Apple Watch Ultra 3 and the Runna app on an iPhone, so the screenshots are how it displays for me. Garmin and COROS users get the same graphs, with a couple of differences I'll flag as we go.


This isn't a review of the app as a whole. If you want my full take on training plans, pace coaching and whether Runna's worth the money, I've written that separately. This is just the post-run screen, metric by metric, diving into all of the Runna post-run stats.



Contents


If you'd rather get posts like this dropped straight in your inbox, subscribe here — no spam, just running.



What Runna shows you after a run


Runna's post-run screen has three layers: a quick overview, your Best Efforts, and a set of graphs that break the run down metric by metric.


The overview is the headline stats. Distance, time, average pace, elevation gain, average heart rate, cadence and calories. (Cookies earned, in my book. Runna, if you're reading, that's a metric I'd pay extra for.) Best Efforts is your quickest 1K, 1 mile, 5K and so on within that run, and it's where the odd surprise personal record turns up.


Then comes the deep dive. On my iPhone it's presented in this order: Laps, Splits, Pace, Elevation, Heart Rate, Heart Rate Zones. Tap More Analysis and you get Cadence, Ground Contact, Power, Stride Length and Oscillation.


That split is a clue. The first six are useful to most runners. The five behind the button are more specialist, and for most people most of the time they can stay behind it.


A word about data before we start


Too much data can be a bad thing. It pulls your focus onto the wrong parts of your running, it encourages you to over-analyse, and if you don't understand what a graph is trying to tell you, it confuses. I've watched runners spend longer worrying about a number than they spent on the run that produced it.


So I focus on a handful of Runna's metrics and I scroll past the rest saying "that's nice". I'd encourage you to do the same. The rest of this article is here so that when you do stop on one of the other graphs, you know what you're looking at.


Runna app free trial code ANDY2

The short version: which metrics matter

If you only read one bit, read this.


Metric

What it tells you

Most useful for

Do I look at it?

Laps

How you did on each section of a session against target

Anyone doing intervals, tempos or progressions

Every session

Splits

Your average pace for each mile or km

Everyone

Every run

Pace

Pace across the whole run as a line

Not much, once you have Splits

Rarely

Elevation

The climbing profile of your route

Anyone who runs hills

When it was hilly

Heart rate

How hard your heart worked, over time

Experienced runners

Every easy run

Heart rate zones

Time spent in each effort band

Experienced runners

Every easy run

Cadence

Steps per minute

Most runners, once the basics are in place

Every run

Ground contact

How long each foot is on the ground

Form nerds and coaches

No

Power

Work rate in watts

Hilly racers and data lovers

No

Stride length

Distance per step

Form nerds and coaches

No

Oscillation

How much you bounce

Form nerds and coaches

No


Laps in Runna: how you did on each part of the session


Laps shows every section of a structured session, the warm-up, each rep or block, each recovery and the cool-down, with your average pace for that section and a dark marker showing the target pace Runna set. If your bar reaches into the dark area at the top, you were in the target range.


On an interval or tempo run this graph appears before Splits, and it's the one to read first. Splits average out a whole mile, and on a session a single mile might contain a fast block and a recovery. Laps breaks that down. If the session was 800 m repeats, you see each 800 m and how you performed on it.


Runna laps chart for an interval run
A Progression Run. Bars reaching into the dark target area mean I hit the pace Runna set.

Take the Progression Run in the screenshot. The laps are my 1.5 mile warm-up, then 2 miles at 8:50, 1.5 miles at 8:30, 1 mile at 8:10, 1 mile at 8:00, and a 1 mile cool-down. Runna gives me the average pace for each lap and whether I landed in the target zone. What I'm reading is the story across the laps. Did I burn out early and find the last blocks harder to hold? Or, as you can see here, did I keep a little back in laps 2 and 3 so I could really lay down some pace in 4 and 5? That was a well controlled run, and Laps is the graph that tells me so.


It's also the data Runna's Pace Insights feature works from. Runna compares the paces you hit in speed sessions with the ones it set and, if there's a clear trend, suggests adjusting your training paces. So those bars matter beyond the single run. If you run with headphones, Runna also nags you live in your ear as each lap unfolds, telling you to speed up or slow down against that same target. I've covered how that live coaching actually feels in a full session if you're curious before you commit.


Laps is the exam result. Splits and Pace are the story of the run.



Splits in Runna: your pace for every mile (or kilometre)


Splits shows your average pace for each mile, or each kilometre if that's how you've set the app up (mine is in miles), with a plus or minus column showing how much faster or slower you were than the mile before. Green plus means faster than the previous mile, red minus means slower. That column trips people up: it's the change from the last mile, not the gap to your target.


This is the one I check after every run, and an easy run is the best example of why.


Runna Splits table showing mile-by-mile pace for an 8 mile easy run
Last night's easy run. Miles 1 and 2 too quick, then dialled back.

Last night I ran 8 flat miles on the rail trail with one goal: keep it in Zone 2. My first two miles were 9:26 and 9:35, a little quick. I'm still in a recovery phase after my emergency surgery earlier this year, I've dialled this training block back considerably, and my Zone 2 pace is a long way from what it usually would be. From mile 3 you can see me bringing the pace back to where it should have been. Mile 5 is an oddity, I filmed a short video while running and the pace shows it. Overall a good run, but mile 1 was the outlier and I went out too quick.


That's what Splits tells you. Did you go out too fast? Because if you did, you'll usually pay for it in the later miles as you struggle to hold the pace. Look for the pattern, not the single number. One slow split is a gate, a road crossing or a dog. Three progressively slower splits at the end of a run is information.


One thing to know while we're here. Runna calculates personal records on total elapsed time, including any rest breaks, so a quick 1K inside a session includes any standing around at the start of it.


Pace in Runna: the graph I skip


Pace shows your pace across the whole run as a continuous line, with your average pace and max pace underneath. Faster is higher on the chart, the opposite of most graphs, so a fast rep is a peak and a stop is a spike falling off the bottom.


I skip over this one most of the time. Splits and Laps give me everything I need, and there isn't much Pace can add. Apart from perhaps a wry smile if the max pace looks impressive. It won't be. Max pace is usually measured over a very, very short distance, a few seconds down a slope or a burst across a road, so it's nothing to shout about.


Where it does earn its keep is alongside Elevation, which brings me to the next one.


Runna pace graph showing pace across a run on an iphone
Runna pace graph showing pace across a run

Elevation in Runna: elevation gain and the profile of your run


Elevation shows how much climbing you did as a profile across the run, with your total elevation gain and maximum elevation underneath. The overview at the top of the screen already told you the total. This graph tells you where the hills were.


That's why I'll sometimes go back to Pace after looking at Elevation. Line the two up and you can see how you performed on the climbs compared with the flat.

It quickly tells you whether you need to ease off on the flat to keep something for the hills, or whether the hills are where you should be working on pace. I'd love Runna to overlay the two on one chart. It misses a trick by not doing so, and I'll come back to that.


Two things newer runners ask about elevation. First, why the number differs between apps. Watches with a barometric altimeter (the Apple Watch Ultra, most Garmin and COROS running watches) measure air pressure to track the ups and downs. Strava then applies its own correction from map data, and it only trusts the watch's figure from certain devices, so the same run can show different gain on Runna, Strava and your watch. All of them are estimates. Don't lose sleep over it.


Second, the chart scales itself to your data. Run a pancake-flat route with a dip at the start and the profile can look like the Alps. Read the numbers on the axis before you panic about the shape.


Runna elevation chart showing total elevation, gain and max elevation
Runna elevation graph for a recent run of mine in Chamonix Mont-Blanc

Heart rate in Runna


Heart rate shows how many times a minute your heart was beating throughout the run, as a line, with your average and maximum underneath. Heart Rate Zones, the next card down, shows how much of the run you spent in each of five effort bands. Let's take the two together, because you read them together.


First, a word if you're a beginner. I would not look at these yet. I see too many new runners convinced they have to be in Zone 2 on every easy run because Google or someone on Instagram told them so. That is total tosh. When you're new, your heart and lungs are adapting to a completely new stress, your heart rate is naturally higher and more variable, and the zone data is largely meaningless until your cardio engine has adapted. That can take months. Many, many months. Runna's own beginner guide says much the same. Run to feel, use the talk test, and come back to this section later. I've written a detailed article on Zone 2 running if you want the full argument.


I approach this as an experienced runner. My engine is pretty good, if a little offline at the moment after the operation, so yes, I look at these after every easy run.


Runna heart rate graph showing heart rate settling into Zone 2 during an easy run
Up to 140 quickly, then settled into Zone 2 for the rest of the run.

Look at the heart rate graph from that same 8 mile easy run. My resting heart rate is about 42. Within minutes of starting it climbed quickly to around 140, then a mile in it settled comfortably into my Zone 2 range of 110 to 135 bpm. And that is where it stayed.


Three things worth knowing about heart rate. It lags. Effort goes up first and heart rate follows a while later, which is why it's a poor guide for short reps and a good one for steady runs. Wrist sensors aren't perfect, so treat the number as a trend rather than gospel. And plenty of things push it up that aren't fitness: heat, humidity, hills, stress, tiredness, caffeine and the early stages of a cold.



Heart rate zones in Runna


The Heart Rate Zones card shows the five zones as bpm ranges, with the time and percentage of the run you spent in each. Runna works your maximum heart rate out as 220 minus your age, then applies the same percentages Strava uses, so the two apps match.


Zone

Runna calls it

% of max heart rate

Mine

Roughly how long you could hold it

Zone 1

Recovery

0 to 65%

0-109 bpm

6+ hours

Zone 2

Endurance

65.1 to 81%

110-135 bpm

1 to 3 hours

Zone 3

Tempo

81.1 to 89%

136-149 bpm

40 to 90 minutes

Zone 4

Threshold

89.1 to 97%

150-162 bpm

6 to 40 minutes

Zone 5

Anaerobic

97.1 to 100%

163+ bpm

Under 5 minutes


Runna Heart Rate Zones card showing time spent in each zone during an easy run
Time in zone. On an easy run, this is the chart that tells you whether it was actually easy.

The zones card confirms the story the heart rate graph told, showing how much of that easy run was actually easy. For me, a big block of time in Zone 2 on a Zone 2 run is the measure of success. I have a habit of running easy runs too fast. A lot of us do. You will too. Once you're experienced enough for this data to mean something, the zones chart is what helps you dial the pace back and adjust for the wind, heat and hills that change your pace on easy days.


Two practical points. The 220 minus age formula is a rough guess and Runna knows it, which is why there's an Edit Zones button on the card. If you've seen a higher number in a race or a hard interval session, use that instead. And the same chart means different things on different runs. An interval session should average out in Zones 3 and 4 with some time in 5. An easy run with 40% in Zone 4 is a run that wasn't easy.



Behind the More Analysis button


Tap More Analysis and you get five running form metrics: Cadence, Ground Contact, Power, Stride Length and Oscillation. On Apple Watch these all come from the watch's own sensors on an Outdoor Run, with no chest strap or foot pod needed. Garmin and COROS users may need a compatible strap or pod for some of them, and on a treadmill these cards will be blank whatever you wear.


Of the five, cadence is the one I look at. The other four I don't, and I'll tell you why in each section. You may see it differently, which is why they're all here.

Cadence in Runna: steps per minute


Cadence is the number of steps you take per minute, counting both feet, shown as a line across the run with your average and maximum underneath.


I absolutely look at this. I've written a full article on increasing cadence, including the truth about where the "180" number actually comes from, so I won't repeat all of it here. The short version: a low cadence often means you're overstriding, landing with your foot out in front of you, which means a heavier heel strike and more impact through your shins and knees on every step. A slightly quicker turnover brings the foot down under your body and is kinder on the legs.


Runna cadence graph showing average cadence with a spike at a run turnaround
Settled in the mid 160s. The spike at mile 4 is the turnaround, not me sprinting.

Look at the cadence graph from the easy run. It settles in the mid 160s, a range I'm both happy and comfortable with at easy pace. There's a spike at around mile 4. That's where I turned around at the halfway point, and I find Runna often throws up a spike like this after you stop or slow and then pick up again, before it settles. I don't believe my cadence hit 200, let alone the 218 the max figure claims. That's the app not assessing it correctly, and it's worth knowing so you don't chase a phantom number.


What's normal? Runna's own guidance is that 180 is a general target but cadence varies a lot with height, leg length, pace and terrain, so treat it as a guide and not a rule. Most recreational runners sit between 160 and 180 at easy pace. Taller runners naturally run lower. And cadence rises with speed. On a recent 1K interval session mine was 165 in the warm-up and 178 in the reps. Same runner, same run.


If you want to raise it, do it gradually, about 5% at a time, with a metronome or a playlist for 10 minutes inside an easy run. Don't try to jump to 180 on Tuesday.


Ground contact in Runna: what's a good ground contact time?


Ground contact time is how long each foot spends on the ground per step, measured in milliseconds. Runna shows it as a line with your average and maximum underneath.


Here's the thing newer runners need to hear about this one. It drops as you speed up. Everyone's does. So a longer contact time on an easy run isn't worse form than a shorter one on an interval session, it's just slower running.


Runna ground contact time graph showing shorter contact time during interval reps
Ground contact on a 1K interval session. It's a mirror image of the pace graph.

You can see it in the screenshot from a recent 1K interval session. Around 250 ms in the warm-up, down to 220 to 230 ms in the reps, back up to 240 and beyond in the cool-down, and an average of 235 ms. Flip the pace graph upside down and you've got the same shape.


For context, most runners sit somewhere between 200 and 300 ms. Garmin publishes percentile bands from its own users, and by those, 220 to 230 ms is the top 30% of runners while 250 ms is the middle. Same runner, same run, two bands. That tells you everything about trying to chase a single number.


Where it might be useful over time is fatigue. If your ground contact creeps up in the last miles of a long run at the same pace, that's your form breaking down. If your easy-run figure drifts down over a training block, your legs are getting springier.

I don't look at it. For me, my running and what I'm trying to achieve, the number is meaningless. I'd rather know how the run felt.



Power in Runna: work rate in watts


Running power is an estimate of how much work you're doing, in watts, the same unit cyclists have used for years. Runna shows it as a line with your average and maximum power underneath.


The idea is that power sits between pace and heart rate. Pace tells you how fast you went but not how hard it was. Heart rate tells you how hard it was but lags and drifts. Power responds instantly like pace, but it accounts for hills, and on some watches wind, so the same watts up a climb at a slower pace is the same effort as more pace on the flat.


Runna running power graph in watts showing power rising during interval reps
Power steps up and down with each rep. Compare it with the heart rate graph, which lags behind.

Put the power graph from my interval session next to the heart rate graph from the same run and you'll see the difference. Power steps up the moment a rep starts and drops the moment it ends. Heart rate keeps climbing into the rep and takes a while to come down.


The catch, and it's a big one: there is no agreed standard for running power. Apple and Stryd calculate it one way, Garmin and Polar another, and Garmin and Polar read higher for the same effort. My 221 W average on the Apple Watch would show as a bigger number on a Garmin. Only ever compare your power with your own past runs on the same device. Apple also reports zero watts while walking, so walk breaks show up as gaps.


Is it worth a beginner's attention? Not yet. It becomes useful when you race hilly courses and want a pacing number that doesn't lie on the climbs. I race hilly courses and I still don't use it, because I'd rather run those to effort. That's a personal choice, and yours might differ.



Stride length in Runna: distance per step


Stride length is how far you travel with each step, in metres, shown as a line with your average and maximum underneath. Strictly speaking watches measure step length, one footfall to the next, and label it stride, but that's a detail.


There's one relationship worth learning here, and it's the reason stride length is on the screen at all. Speed is cadence multiplied by stride length. That's it. To run faster you take more steps a minute, longer steps, or both.


Runna stride length graph showing longer strides during interval reps
1.05 to 1.10 m in the warm-up, 1.18 to 1.22 m in the reps.

You can check the maths on my interval session. In the reps my cadence was 178 and my stride 1.20 m. That's 214 metres a minute, which works out at 7:32 per mile. Runna's max pace for the run was 7:29. In the warm-up it was 165 steps at 1.08 m, about 9:02 a mile against an actual 9:09 to 9:15. Getting from 9:10 pace to 7:30 came from a 10 cm longer step and 13 more steps a minute. Not one or the other. Both.


What newer runners get wrong: longer is not better. Reaching your foot out in front of you to lengthen the stride is overstriding, and it puts the brakes on with every landing while loading your shins, knees and hips. The foot should land roughly under your hips. Let stride length develop naturally with fitness and work on cadence instead.

Typical figures at easy pace are somewhere between 1.1 and 1.6 m depending on height and speed. Mine averaged 1.10 m on that run. I don't look at it.



Vertical oscillation in Runna: how much bounce is too much?


Vertical oscillation is how much your body bounces up and down with each step, in centimetres. Runna shows it as a line, and on my screen gives the maximum figure only.


Running is supposed to move you forwards. Energy spent going up is energy not spent going along, so less bounce is generally more efficient, and a lower cadence tends to come with more bounce. But some bounce is necessary. Remove it entirely and you'd be running with deeply bent knees, which costs far more energy than it saves.


Runna vertical oscillation graph showing bounce in centimetres during a run
9.2 to 9.7 cm in the reps, 10 cm and above in the warm-up and cool-down.


Mine sits between 9.2 and 9.7 cm in the reps and 10 to 10.4 cm in the warm-up and cool-down, with a max of 10.6. Most runners fall between 6 and 12 cm and under 10 is fine for a recreational runner. So I bounce a bit. The gaps in the graph are where the watch briefly lost the reading as I slowed at the end of each rep, not something I did wrong.


Like ground contact, bounce drops as pace rises, and the chart zooms into a range of a couple of centimetres so a tiny change looks dramatic. Read the axis. If you want it lower, don't consciously try to bounce less, which makes people run stiffly. Nudge your cadence up and bounce usually comes down on its own.


The number coaches prefer, vertical ratio, which is bounce divided by stride length as a percentage, isn't something Runna shows. I don't look at oscillation.

That's nice. Swipe.



Where Runna falls down (and I say this as a fan)


Those who know me know I'm one of Runna's biggest fans. With that comes a wish for the product to keep improving, so here's what this screen still gets wrong.


No overlay. Elevation and Pace sit on separate cards. Put them on one chart and I'd know at a glance whether I'm losing my run on the climbs or on the flat. Runna definitely misses a trick here.


The help icon disappears exactly where you need it. Heart Rate, Heart Rate Zones and Cadence each have a little "?" next to the heading that explains the metric. Ground Contact, Power, Stride Length and Oscillation don't. Those are the four most runners have never heard of.


No context for the form numbers. Runna shows you 235 ms and 10.6 cm and leaves you there. No "typical for you", no trend across runs, no range. On their own those numbers mean nothing, which is a big part of why I don't look at them.


Cadence spikes. A max cadence of 218 after a turnaround isn't real, and a newer runner would take it at face value.


Oscillation shows max only. Every other card gives you an average. This one doesn't, and max is the least useful number on it.


None of these are deal breakers. All of them are fixable. If you want the wider gripes, the training plan structure, the AI coaching, the pace nagging in your ear, that's all in my full Runna review.



Exclusive reader offer: two weeks of Runna, free

If you've read this far and you're not yet on Runna, here's something you won't get from the App Store.


The standard Runna free trial is one week. I'm an Official Runna Ambassador, which means I can double that to a full two weeks of premium access for readers of this blog. That's everything in the app: set up a personalised training plan for your goal, run it with your watch, and see every one of the graphs in this article on your own runs. Two weeks is enough to get through a proper block of sessions and decide for yourself which metrics you'll look at and which you'll swipe past.


Use promo code ANDY2 when you sign up, or click here to redeem it directly.


Runna free trial code ANDY2

My summary


First, pick a few and ignore the rest. Too much data will have you focusing on the wrong things. Laps and Splits after every run, Heart Rate Zones on easy runs once you're experienced enough to read them, and Cadence if you're working on form. Everything else can stay behind the More Analysis button.


Second, read the form metrics against the pace. Ground contact, power, stride length and oscillation all move with how fast you're running. A number on its own tells you nothing. The same runner is "average" and "top 30%" on the same run depending on which mile you look at.


Third, if you're new, look at Splits and not much else. Did you go out too fast? That's the question that matters in your first year. Heart rate zones can wait until your engine has caught up.


Lace up, enjoy your miles.



Runna Post-Run Stats: FAQs


What do the post-run stats in Runna mean?


Runna's post-run stats break your run into an overview, your Best Efforts and a set of graphs. The overview gives distance, time, average pace, elevation gain, average heart rate, cadence and calories. Best Efforts shows your quickest 1K, mile, 5K and so on within the run. Then come graphs for Laps, Splits, Pace, Elevation, Heart Rate and Heart Rate Zones, which describe how the run went. A More Analysis button adds Cadence, Ground Contact, Power, Stride Length and Oscillation, which describe your running form.


Which Runna metrics should a beginner look at?


Beginners should mainly look at Splits in Runna, to see whether they went out too fast. If the run had pace targets, check Laps as well. Heart rate and heart rate zones are largely meaningless until your cardio fitness has adapted, which can take months, so run to feel and use the talk test instead. The form metrics behind More Analysis can wait, because Runna gives no context for what's normal.


What is the difference between Laps and Splits in Runna?


Splits are your average pace for each mile or kilometre. Laps are each section of a structured session, the warm-up, reps, recoveries and cool-down, with your pace against the target Runna set. On an interval or tempo run, Laps tells you whether you hit the session, because a single mile split can average a fast rep and a recovery together.


What do the plus and minus numbers mean in Runna splits?


The plus and minus numbers in Runna splits show how much faster or slower each mile or kilometre was than the one before. A green plus means faster than the previous split and a red minus means slower. They don't compare you with your target pace. One slow split is usually a gate or a road crossing. Several getting slower towards the end usually means you went out too fast.


Do Runna's Best Efforts include rest stops?


Yes, Runna's Best Efforts include rest stops. Runna calculates Best Efforts and personal records on total elapsed time, including any time spent standing still. A fast 1K inside a session includes any pause at the start of it, so a Best Effort can look slower than the pace you actually ran.


How does Runna calculate heart rate zones?


Runna estimates your maximum heart rate as 220 minus your age and sets five zones as percentages of it. Zone 1 is 0 to 65%, Zone 2 is 65.1 to 81%, Zone 3 is 81.1 to 89%, Zone 4 is 89.1 to 97% and Zone 5 is 97.1 to 100%. It's the same method Strava uses, so the two apps match. The formula is only a rough estimate and can be well out for some runners.


How do I change my heart rate zones in Runna?


You change your heart rate zones in Runna with the Edit Zones button on the Heart Rate Zones card. If you've seen a higher heart rate in a race or a hard interval session than 220 minus your age predicts, set your zones from that instead. Zones based on your real maximum make the time-in-zone chart far more useful on easy runs.


Why is my heart rate high on an easy run in Runna?


A high heart rate on an easy run is usually down to something other than fitness: heat, humidity, hills, stress, tiredness, caffeine and the early stages of a cold. Wrist sensors aren't perfect either, so treat the number as a trend. If your zones are set from 220 minus your age, they may simply be too low. And if you're new to running, a higher, more variable heart rate is normal while your cardio fitness adapts. I've written more on this in my Zone 2 running guide.


What is a good cadence in Runna?


A good cadence for most recreational runners is 160 to 180 steps per minute at easy pace, but there's no single right number. Runna's general guidance is around 180, though taller runners run lower and cadence rises with speed. Mine is about 165 in a warm-up and 178 in 1K reps. A low cadence can be a sign of overstriding. If you want to raise it, go up about 5% at a time. More in my guide to increasing running cadence.


What is ground contact time in Runna?


Ground contact time is how long each foot stays on the ground with each step, measured in milliseconds. Most runners fall between 200 and 300 ms. It gets shorter as you run faster. On my 1K interval sessions it's around 250 ms in the warm-up and 220 to 230 ms in the reps.


Is a high ground contact time bad?


A high ground contact time isn't bad on its own. Because it falls with speed, a higher number on an easy run than on a hard session is normal. It's more useful as a trend. If it creeps up over the last miles of a long run at a steady pace, your form is tiring. If your easy-run figure drops over a training block, your legs are getting springier. Only compare runs of a similar type and pace.


What does Power mean in Runna?


Running power is an estimate of your work rate in watts, calculated by your watch. It accounts for hills in a way pace doesn't, and it responds instantly in a way heart rate doesn't. There's no agreed standard, and Garmin and Polar read higher than Apple and Stryd for the same effort, so only compare power with your own runs on the same device.


What is stride length in Runna?


Stride length is the distance you cover with each step, in metres. Typical easy-pace figures are 1.1 to 1.6 m depending on height and speed. Your speed is cadence multiplied by stride length, so to run faster you take quicker steps, longer steps or both. Don't reach your foot out in front to lengthen it, because that's overstriding. Let it develop with fitness and work on cadence instead.


What is vertical oscillation in Runna and should I try to lower it?


Vertical oscillation is how much your body bounces up and down with each step, in centimetres. Most runners fall between 6 and 12 cm, and under 10 cm is fine for a recreational runner. Some bounce is necessary. If you want it lower, raise your cadence slightly rather than consciously trying to bounce less, which tends to make you run stiffly. More in my guide to vertical oscillation.


Why are ground contact, power, stride length and oscillation blank on my Runna run?


These metrics are blank when your watch didn't record them, because they come from the watch, not the Runna app. Apple Watch records them on Outdoor Run only, so treadmill runs show nothing. Older Garmin watches need an HRM-Pro, HRM-Fit or Running Dynamics Pod, and COROS watches need the COROS Pod for full running dynamics. If you record with your phone alone, none of them appear.


Why does Runna show my max cadence as 200+ when I wasn't sprinting?


A max cadence over 200 in Runna is a measurement glitch, not a real number. It usually appears just after you stop, slow or turn, at a gate, a road crossing or the turnaround on an out-and-back, and the reading spikes briefly before settling. On one of my easy runs it claimed 218 at the halfway turnaround. Ignore the max and look at the average.


Why does my elevation gain in Runna differ from Strava?


Runna and Strava can show different elevation gain for the same run because they don't calculate it the same way. Watches with a barometric altimeter measure elevation from changes in air pressure. Strava then applies its own correction from map data and only trusts the watch's figure from certain devices, so the same run can show a different gain in each app. All elevation figures are estimates. Also check the axis on Runna's elevation chart. It scales to your data, so a small dip can look like a mountain.


Are the calories shown in Runna accurate?


The calories shown in Runna are a rough estimate, not a precise figure. They're worked out from inputs such as your pace, distance, body weight and heart rate, and calorie estimates from wrist-worn devices vary considerably. They're most useful for comparing one of your runs with another, not for working out exactly how much to eat afterwards.



About the author


Runner Andy Hood training at Club la Santa in Lanzarote

Andy Hood is an ultra runner, cancer survivor and advocate based in Devon. He races in the mountains, on the trails and around the world, has rebuilt his running twice through illness and surgery, and writes about training, gear and racing at runningwestwardho.co.uk.


He is the founder of Check Ya Balls, menswear that saves lives.

With over £27,000 raised to date for cancer charities, Andy is always finding ways to support those diagnosed with cancer.


Andy has trained with Runna throughout his rebuild. New to the app? Use promo code ANDY2 to double your free trial to two full weeks of premium access, or click here to redeem.

Comments


bottom of page