life hacking

Posts Tagged ‘Spine’

Fitness

By admin • Aug 10th, 2009 • Category: Body

There are three kinds of fitness: Aerobic fitness – the heart and lungs Resistance fitness – muscular strenght Flexible fitness – flexibility Aerobic Fitness Aerobic fitness refers to how high your heartrate goes when you exercise, and how long it takes to return to normal afterwards. Take your pulse for twenty seconds and then multiply [...]