One of the hot training topics these days is how quickly you lose fitness when your workouts are reduced. 

But you could also lose fitness faster because of what's going on in your head.

Cardiorespiratory fitness - shown by a person's VO2 max will decrease around 10% in the first four weeks after a person stops exercising. The rate of decline continues but eventually evens out.

Highly trained athletes (like a marathon runner) will maintain a VO2 higher tha...

We become unfit much quicker than it took to get in shape. To understand how the body becomes unfit, we need to understand how we become fit.

The key to becoming fitter is to do more than our body is used to. The stress from this makes us become more tole...