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A comment on What, Me Exercise?: The Hacker Exercise Regime. Parent comment

Re:What, Me Exercise?: The Hacker Exercise Regime by sliverstorm on Tuesday June 22, 2010 @06:41PM (#1453475)
I've always heard cycling is the most energy efficient form of transportation for a human, period.

Why exactly do situps destroy your back? I am rather fond of doing hanging situps (hanging by knees) with weights. I wonder if they are just as bad...?

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Re:What, Me Exercise?: The Hacker Exercise Regime by jules on Tuesday June 22, 2010 @08:59PM (#1453762)
Sure, cycling is more efficient kcal/km wise, but at least the speed that I and most people I know cycle is more intensive than walking kcal/second.

The sit ups: http://en.wikipedia.org/wiki/Sit-up_(exercise) I don't know if the same applies to hanging sit ups, but this Wikipedia article says:

> Situps can be dangerous due to high compressive lumbar load[1] and may be replaced with the crunch in exercise programs[2].

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