The chest expander is a fairly simple tool consisting of two handles joined by two latex tubes. Nowaday, 8 forms chest expander become more and more popular. It is lighter and more portable, and therefore much easier to travel with. The chest expander is actually fairly versatile and can be used to work more than the chest. It can also be used to work the back, lats, shoulders, forearms and the triceps. You can use this chest expander as a great general warm-up when you wake up, before participating in sports, and even before yoya, tai chi, meditation and many other activities requiring deep breathing exercises. The chest expander can count and calculate your burning calories.