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Old 08-19-2006, 11:49 AM   #3
Ross Hunt
Member Ross Hunt is offline
 
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Join Date: Jan 2004
Location: Annapolis  MD
Posts: 914
IMO, the discrepancy reported on the front page is surprising, and probably does have a lot to do with the 'rest' during the sit-up.

I wonder how the ratios would look (for CrossFitters or for other athletes) when strength rather than strength endurance is compared in the two exercises. I've done weighted glute-ham sit-ups, and let me tell you, they're HARDER than back extensions. The range of motion is just so much huger. The back extension actually seems quite comparable to the glute-ham sit-up in difficulty if I only lower my torso to parallel to the ground on the sit-up, pausing there for a moment-- it's getting from hip angle at ~225 degrees to hip angle at 180 degrees that's the killer.

I haven't done the glute-hams for a while, though. Those mess with my back, even with proper extension of the leg.
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