02/03/2026
Is Zone 2 Training Overrated?
Zone 2 training has been recently touted as the “holy grail” of exercise, offering unique benefits compared to other forms of exercise, including high intensity.
I would say this is largely undetermined or false. Let me explain.
Research is still mixed on if zone 2 training offers any unique benefits compared to other intensities of exercise. Many studies actually demonstrate that high intensity exercise offers greater mitochondrial adaptations, particularly respiration.
Furthermore, in terms of longevity, higher intensity exercise is correlated with decreased risk of mortality more so than zone 2 or low/moderate intensity exercise.
So what does this mean?
The best “bang for your buck” mode of exercise is going to be the higher intensity forms. This will drive greater adaptations.
That being said, it is essential to take into account the fitness level and recoverability level of the individual. It would not be beneficial to prescribe multiple high intensity sessions to low fitness level individuals with poor recoverability as this would increase risk for injury.
So, yes, zone 2 has its place in training as it allows one to improve their cardiorespiratory fitness with minimal tissue damage and is generally easy to recover from. Once a cardiorespiratory fitness base has been built, one can increase their intensity of exercise.
Again, higher intensity exercise will drive the greatest adaptation. So, if you are pressed for time and have a decent aerobic base, higher intensities would be more beneficial for reducing comorbidities and mortality.