When it comes to exercise, if you have good metabolic flexibility, your muscles can use your fat stores at higher levels of activity compared to someone with poor metabolic flexibility.
World class marathoners can stay in Zone 2 and continue to burn fat despite running at a pace that the rest of us would consider a sprint.
For someone with poor metabolic flexibility, even light activity may cause their system to move into Zone 3 or above.
So, what’s happening here and why is it important?
To really understand the relationship between Zone 2 training and metabolic flexibility, let’s talk about your body’s energy factories: your mitochondria.
