back leg :

1. Recreation and Sports

   Research proves that paddling was done almost about 8, 000 years back. ... At the same time, your legs your eyes and your hands just can't seem to work well together. ...

   www.articlebin.info/recreation-and-sports/

2. balance

   When you are a 5-foot-9, 202-pound running back and you can squat 620 pounds in ... and balance in your legs to keep moving when a huge defensive lineman, ...

   www.articlebin.info/finance/search_balance.html