Quote Originally Posted by sgtiger View Post
I heard for cardiovascular health, it takes about 2 months of regular activity for an inactive person to reach the fitness(heart-wise) of someone who has exercised their whole life and vice versa.
Humm, forgive me to be skeptical, but it takes about 10 years to build an endurance athlete. The more we exercise, the more our vascular system ramifies and improves, irrigating our muscles, etc.

On one variable or another, that two-month measure may be true, but overall it's not making a lot of sense...

Regarding the 30% mesure, it sounds somewhat reasonable if one considers it week-by-week. Ex: if I have 100 "units of fitness", then after one week of break I have 70 left, then after another week off, 49, then after another week, 34, etc.

I'm pretty sure, though, that someone with a well established fitness base will recover faster than someone with only a few months of training.