abdomen
Abdominal
Rectus Abdominis
the abdominal muscles
tiens-toi droit is the French equivalent of 'sit up'. The sports exercise 'sit-ups' is called 'les abdos' (after the belly muscles 'abdominaux')
without muscles your body would not be able to work. you would not be able to do anything not even sit up or go poop.
your gluts, abs, and your intogalactibal muscle.
The v-sit up primarily targets the rectus abdominis (six-pack muscles) and hip flexors. Additionally, the exercise engages the obliques (side abdominals) and other stabilizing muscles in the core to maintain balance and control.
300
Muscles contracting for a long period of time
Sit up will do. If you want to develop powerful muscles, then keep the weight on your shoulder and then do the sit ups. Do it 4 to 8 times at interval on alternate days. You will have well developed muscles in a month or two.
Sit ups train the abdominals when performed properly. They also train the back muscles too. There are many different variations to work different muscle groups.