Howcast - Learn how to work out with an injured knee from personal trainer Mindi Smith in this Howcast sexy legs workout video.

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Howcast - Learn how to do the standing hamstring stretch from personal trainer Mindi Smith in this Howcast sexy legs workout video.

Howcast - Learn how to do the standing quad stretch from personal trainer Mindi Smith in this Howcast sexy legs workout video.

Howcast - Defeat the Gorilla in Binary Domain, the squad-based third-person shooter from Yakuza Studio.

Howcast - Check out part 34 of this walkthrough for the third person action shooter "Warhammer 40K Space Marine" and beat Chapter 4 with this online demo.

Howcast - Learn how to teach your baby how to speak from pediatrician Dyan Hes, M.D. in this Howcast video about newborn and baby development.

Howcast - Let musician Alex Skolnick teach you finger vibrato techniques in this heavy metal guitar lesson from Howcast.

Howcast - Learn how to hold scissors while cutting hair from stylist Janet Waddell in this Howcast hair tutorial.

Howcast - Check out part 32 and join the war between the Autobots and Decepticons in Activisions' newest release, Transformers: Fall of Cybertron

Howcast - Learn how to do a side balance with a bosu ball from personal trainer Rachel Shasha in this exercise ball workout video from Howcast.

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Howcast - Learn how to hold a katana sword from Sensei Oliver Martin in this katana sword fighting video from Howcast.

Howcast - Learn how to warm up before a run with this running training video from Howcast.

Howcast - Learn how to breathe correctly during a run from competitive runners Doug Oldiges and Stephanie Coburn in this Howcast video.

Howcast - Learn how to stretch your calves before a run from competitive runners Doug Oldiges and Stephanie Coburn in this Howcast video.