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Anonymous
My back starts hurting when I'm doing sit ups. What am I doing wrong?

pic unrelated
>> Anonymous
>What am I doing wrong?

You're doing situps.
>> gay
your body doesn't want you to do them. STEOP IMMEDIETLY
>> Anonymous
hurting or burning? you have back muscles that get worked too.
>> Anonymous
dont do sit ups
>> Anonymous
don' t do
Sit Ups (especially on a ball)

the architecture of the big abdominal muscles dictate that it is not meant for big movements as in a full sit-up on the ball. Further, sit-ups promote an often undesirable flexion of the back (rounding). In fact the National Institute for Occupational Safety and Health (NIOSH) recommends a limit of 3400 newtons of force to keep the back safe. Sit-ups contribute 3413 newtons.
Better alternative: Short range crunch, tabletops, prayers.