Boost Your VO2 Max
VO2 max is seen as the ‘gold standard’ in terms of measuring aerobic fitness in athletes. In a nutshell, it’s the maximal amount of oxygen you can utilise and transport to your muscles in a given period of time.
While there is some debate around whether or not you can improve your VO2 max with training, the polarised training model has been shown to increase both your stroke volume and your ability to burn oxygen. This comes from exercising in the ‘severe’ domain (Zone 5), where VO2 max and other metabolic adaptations are induced faster with just a few highintensity training sessions per week.
“HIIT results in various physiological adaptations, such as increased skeletal muscle oxidation capacity and hydrogen ion buffering capacity,” says Salzwedel. “These sessions have been shown to improve VO2 max, lactate threshold, and peak power output (PPO).”