Whether you're a runner, golfer, tennis player or gym goer, tight hamstrings can put a dampener on your game or workout routine.

Are you looking for a program that can be done fast and effectively? If the answer is yes, you may want to give Tabata a try. Tabata is a type of high-intensity interval training which consists of 8 (eight) 30-second mini circuits, with a work to rest ratio of 2:1.

The current men’s world record of 9.58 seconds is held by Usain Bolt, set at the 2009 World Athletics Championship final in Berlin, Germany. How do these athletes train to improve their running speed?