What are box jumps, how do you do a box jump, and what happens if you do 50 a day for a week? We found out. HOME. MAIL. NEWS. FINANCE. SPORTS. ENTERTAINMENT. LIFE. SEARCH. SHOPPING. YAHOO PLUS.

Living to 100 but feeling awful for the last 40 years? That’s no way to age well. If you want to be fit now and age like fine wine, the box jump’s where it’s at. This high-energy move (where ...