your gluts, abs, and your intogalactibal muscle.
erector spinae for spinal extension and quadratus lumborum for spinal abduction
the abdominal muscles
stomach musle i cant belive u dident know that
A sit up is an eccentric muscle contraction.
Technically speaking it's the abs. The agonist muscle in a situp is actually the hip flexors.
In a sit-up, the primary agonist muscle is the rectus abdominis. This muscle contracts to flex the spine and bring the torso towards the thighs. Other muscles, such as the hip flexors, also assist in the movement but the rectus abdominis is the main muscle responsible for the action.
The gluteal muscle.
Pain in right lower side when I sit up sneeze or roll over?
Your pectoral muscle allows you to do a push up. When you do a push up you use your pectoral muscle, your tricep muscle, and you use your shoulder back at the rotator cuff.
The fixator is one of many muscles used during situps. The fixator muscle stabilizes one part of your body when you move another part.
when you sit are of your muscle pressure goes to your legs, to make them stronger to hold you up. So depending on your weight And muscle value you could hold up to 2x your weight.
this would be to use light weights you are still working your muscle but not to bulk them up