The best way of calculating your CRF is through your VO2max score, which is simply the maximum amount of oxygen your body can utilise during exercise. Luckily, many of today’s running watches and apps will calculate this for you. There are many things you can do to naturally improve and maintain your own CRF, which can help improve your running performance as well as your longer-term health and longevity.
“Crucially for runners, you need to follow a well-structured, consistent and progressive plan,” explains Eddie Fletcher, a sports scientist at Wattbike (wattbike. com). “This means a plan with the optimum mix of duration, volume, intensity, rest and recovery.”