March, 2012

The Good, The Bad, and The Ugly of Hamstring Strengthening Exercises

March 21, 2012

The Good, The Bad, and The Ugly of Hamstring Strengthening Exercises By Sandy Baird, DC, ART   When it comes to strengthening exercises for the hamstrings, a more accurate description would be “Good, Better, and Ugly”.  Most hamstring injuries occur during the late-swing phase of gait, as the hamstrings eccentrically contract to help slow down the leg.  Any strengthening that can be done in an eccentric manner can help prevent injury.   Straight-leg deadlifts/Goodmornings (“Better”) Straight-leg Deadlifts and Goodmornings are great exercises to strengthen the hamstrings and tendons, as they allow strengthening over both of the joints that the hamstrings cross (the hip and the knee).  This allows you to train the hamstrings in positions that best approximate the motions of running.  Click here to learn how to perform straight-leg deadlifts with proper form.   Nordic hamstring exercises (“Good”)  Nordic hamstring curls only strengthen across the knee joint, as the hip is held in a fixed position.  Nonetheless, they have been shown to prevent injuries.   Let yourself fall from a kneeling position while someone holds your feet.  Catch yourself just before you reach the floor, push up and repeat.   Concentric hamstring curls (“Ugly) These have actually been shown to raise susceptibility of injury to the muscle during eccentric contraction, since they reduce the number of sarcomeres in the fibers (resulting in the muscle operating best at a shorter length).  If you will be running or sprinting, you want your hamstrings to work optimally at all lengths!  Avoid traditional concentric hamstring curl exercises.  If you can’t break your addiction to the hamstring curl machine at the gym, you can still focus on the eccentric phase by raising the weight with both legs (should feel easy), and then slowly lowering with one leg.   References: 1)      Arnason, A., Andersen, T.E., Holme, I., Engebretsen, L. & Bahr, R. (2008) Prevention of hamstring strains in elite soccer: an intervention study Scandanavian Journal of Medicine and Science in Sports, 18 (1), 40-48 2)      Brocket, C.L., Morgan, D.L. & Proske, U. (2004) Predicting hamstring strain injury in elite athletes Medicine and Science in Sports Exercise, 36 (3), 379–387. 3)      Mjolsnes, R., Arnason, A., Osthagen, T., Raastad, T., & Bahr, R. (2004) A 10-week randomized trial comparing eccentric vs. concentric hamstring strength training in well-trained soccer players Scandanavian Journal of Medicine and Science in Sports, 14, 311-317.
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Walnut Creek Grand Opening

March 7, 2012

Innesport invites you to join us at NorCal Golf Academy's Grand Opening Party this Saturday!

  When:  Saturday, March 10th between 4-8PM Where:  NorCal Golf Academy:   2094 Mt. Diablo Blvd. Suite B | Walnut Creek, CA 94596    (In the same complex as Dutch Girl Cleaners by the entrance of 24.) What:  Experience state of the art technology such as the K-Vest and K-Trainer!  Try a swing, do some rehab exercises.  Golf Pros, Golf Exercise Trainers, and Golf Sports Medicine staff will be there to answer questions about Golf and other sports, Sports Medicine, Video Analysis, Fitness, etc.     Snacks and drinks provided. NorCal Golf Academy is an indoor golf facility equipped with a putting green, 3 golf swing bays all with video and K-vest, a launch monitor, TRX and fitness equipment as well as a sports medicine clinic. Innersport provides sports medicine support via ART, Graston, Spidertech, and rehab exercises for NorCal Golf Academy's golfers as well as local triathletes, runners, cyclists, youth athletes, and weekend warriors. To learn more about NorCal Golf Academy, visit:   www.norcalgolfacademy.com  or come to the Open House!  
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