By Tracy Hafen for YouBeauty.com Such maximal or near-maximal effort intervals are called sprints. Their benefits will tempt
An intriguing, technological watershed is fast approaching for Athletics -- that defining moment when an athlete with artificial limbs shatters an "able-bodied" world record.
Carlin Isles is an accomplished 23-year-old sprinter who is now turning heads on the rugby pitch instead of the track. Dubbed
What do Marion Jones (American Olympic track and field champion and disgraced drug-user) and Lance Armstrong (a once seven-time Tour de France winner and disgraced drug user) have in common? Neither of them ever failed a drug test.