What Muscles Does a Hamstring Curl Work Out?

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The hamstring is really one continuous bulk of muscles located behind the leg. Find out what muscles a hamstring curl actually works out with help from a certified personal trainer in this free video clip.

Part of the Video Series: Exercise Techniques
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Video Transcript

Hello. This is Bill Victor of VictorFitnessSystem.com, and I'm here today to talk to you a little bit about the muscles that are worked out when we do a hamstring curl. The hamstring is really one continuous bulk of muscles located behind the leg and plays a critical roll in the flexing of the knee. That muscle group is referred to as the biceps femoris. The biceps femoris is that one key large muscle behind the leg. The biceps femoris then splits almost like a snake's tongue it bifurcates. One side inserts behind the knee in an area called the semitendinosus and the other side, it inserts in the knee in what's called the semimembranosus. It's the combination of the biceps femoris and the semiteninosus and the semimembranosus that help give us critical knee stability. The machine I'm sitting in today is what's called a seated leg curl, where I feel resistance so that I pull my heels down towards my buttocks and shortening my hamstring group. I then go ahead and return the weight back to where it originally began. This is not the only exercise that isolates the hamstrings. One more advances lift would be a straight legged dead lift. Regardless of which movement you use keep in mind that exercising the hamstrings is critical to not only muscular development but knee stability. This has been Bill Victor wishing you a great workout and a great day.

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