VO2 Max and Lactate Testing for Canicross and Dog Runners

Most runners come to VO2 max and lactate testing to stop guessing at effort — to know, precisely, what their easy pace, threshold and race zones actually are, rather than estimating from a recent race time. If you run with a dog, canicross or otherwise, that problem is worse than it is for a solo runner. Pace lies to you more, not less.

Why pace is a worse guide when a dog's involved

A dog on the lead — pulling, lagging, or somewhere in between — changes your pace independently of your effort. A session that feels genuinely hard can still show a slow average pace if your dog kept stopping to sniff. A session that felt easy can show a fast one if your dog towed you the whole way. Either way, pace alone stops telling you what your actual physiological effort was.

This is exactly the problem VO2 max and lactate testing solve for any runner — but for dog-runners specifically, it matters more, because the usual backup method (just trust the pace on your watch) is less reliable to begin with.

What testing actually gives you

A proper lactate and VO2 max assessment gives you your real physiological zones — easy, threshold, and everything in between — based on how your body actually responds under load, not an estimate extrapolated from a single race result. Once you have that, dog-runs stop being a guessing game: you can check your heart rate and perceived effort against your true zones regardless of what pace the dog produced that day.

For canicross specifically, this matters even more. Canicross training already asks you to run against a moving, variable resistance — your dog's pull isn't constant, and it changes as your dog's own fitness improves. Coaching an owner toward a canicross goal works best when the human's zones are set independently of the dog, with the dog's welfare (heat, paw condition, pulling willingness) acting as a hard limit on the session rather than the pacing target itself. Get the human zones wrong, and every session built on top of them is calibrated against noise.

The other half of the equation: what the dog is actually contributing

Your zones tell you your effort. They don't tell you what your dog is doing to your pace — and for most dog-runners, that number has simply never been measured. DogJoggers built a free tool for exactly this: run a solo 5K and a with-dog 5K, and their PawPace calculator shows you the actual percentage your dog adds to (or takes off) your pace, alongside pacing tables for both.

Put the two together — real physiological zones from testing here, and a real measured dog effect from DogJoggers — and "how hard did that run actually feel" stops being a guess for either half of the team.

If you run with your dog, whether that's loose-lead jogging or full canicross, it's worth checking both numbers rather than one. Book a VO2 max or lactate assessment with us, and see dogjoggers.co.uk for the dog side of the equation.