Why do sit-ups hurt your thighs?
Because the muscles above the thigh are the source of strength to pull up the whole upper body, it can only be said that the posture is incorrect and the waist cannot be fully stressed. But sit-ups are the most useless exercise for the abdomen, and they also hurt the lumbar spine. When you are old, you will regret doing this sit-up. Push-ups keep your whole back and legs straight, and it's better every hour.