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Science

Time to Sit Up and Review Your Exercise Regimen?

¡Viva la Science!

Maybe you've heard this a jillion times: Core strengthening is vital if you want to avoid injury. But is it true? A new study doesn't conclusively say one way or the other, but it sure casts some doubt on the incredibly common assertion.

In the study, released in the journal Physical Therapy, 1,100 soldiers aged 18 to 35 were divided into two groups. One group used a core stabilization exercise program that lacked sit-ups, while the other used a traditional exercise program that included bent-knee sit-ups. The point was to compare how the two programs affected the rate of musculoskeletal injury.

Why the focus on sit-ups?

Despite longstanding tradition and the widespread popularity of sit-ups, it has been postulated that this exercise results in increased lumbar spine loading, potentially increasing the risks of injury and low back pain (LBP). Specifically, sit-ups produce large shear and compressive forces on intervertebral disks and across the lumbar spine. Increased muscle activation anteriorly results in both initial hyperextension and subsequent hyperflexion of the lumbar spine, contributing to large compressive forces during sit-ups.

Sit-ups have long been an important yardstick by which the US Army measures physical health. But if they're causing injuries, or failing to prevent injuries that core strengthening could prevent, that might need to change.

The results, though, didn't show any massive difference in injuries between the two groups. “There were no differences in the percentages of soldiers with musculoskeletal injuries. There also were no differences in the numbers of days of work restriction for musculoskeletal injuries overall or specific to the upper extremity.”

It’s worth nothing that the results for the two groups weren't identical. Soldiers who completed the traditional exercise program did have more days of work restriction than the other group if their injury was to the low back.

As much as we all like studies that conclusively prove broad truths, the reality is that what we “know” tends to advance in teensy increments. This study is one thread in a much larger tapestry. What it tells us, though, is that sit-ups might not be the bogeyman and core strengthening might not be quite the miracle each has been portrayed as—as usual, more studies are needed.

--

Via: Saveyourself.ca – check out the lively and informed discussion taking place on their Facebook page

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V.20 No.14 | 4/7/2011
Play Youtube Video

Aural Fixation

Maximum Burn

A sonic exercise aid

Music is a workout motivator second only to the thought of looking svelte and fabulous in swimwear. To help you get pumped, Music Editor Jessica Cassyle Carr shares a mix of her old dance party favorites that doesn't involve the shudder-inducing sonic foolishness often found on other workout mixage. Enjoy.

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