Howcast - Learn 3-speed training drills from sprinting coach Shane Paul Neil in this Howcast video.

Howcast - Learn how to walk across a dip bar from Warrior Fitness Boot Camp creators Ruben Belliard and Alex Fell in this Howcast workout video.

Howcast - Learn how to rope climb with your feet from Warrior Fitness Boot Camp creators Ruben Belliard and Alex Fell in this Howcast workout video.

Howcast - Learn how to do a lunge from Warrior Fitness Boot Camp creators Ruben Belliard and Alex Fell in this Howcast workout video.

Howcast - Learn how to do a Spider-Man push-up from Warrior Fitness Boot Camp creators Ruben Belliard and Alex Fell in this Howcast workout video.

Howcast - Learn how to foam roll your quadraceps in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn how to foam roll to prevent knee pain in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn how to foam roll your peroneals in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn how to foam roll your hamstrings in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn how to release your IT band with a foam roller in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn advanced techniques for foam rolling your adductor muscles in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn how to do a kneebar MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a triangle choke from side control MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a triangle choke from guard using overhook MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a kimura from north south MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a teacup kimura MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn about safety gear for rollerblades from former World Champion speed skater Gypsy Lucas in this Howcast video.

Howcast - Learn how to t-stop on roller skates from former World Champion speed skater Gypsy Lucas in this Howcast video.

Howcast - Learn how to do a salchow on roller skates from former World Champion speed skater Gypsy Lucas in this Howcast video.

Howcast - Learn how to receive a soccer ball with your thigh from Coach Frank Hauser in this Howcast soccer video.

Howcast - Learn how to do an arm triangle choke from the top half guard position from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to say "are you OK" in Mandarin Chinese in this online language lesson from Howcast.

Howcast - Learn how to say "I love you" in Mandarin Chinese in this online language lesson from Howcast.

Howcast - Before you take the ultimate flexibility challenge, follow these important steps to prevent injury.