What muscles do you exercise by bending your legs and pulling hard? What muscles do you exercise by bending your legs and pulling hard?

1, action analysis: there are two ways for muscles to do work when bending legs hard, namely isometric contraction and isotonic contraction. The back is isometric contraction, that is, the length of back muscle contraction does not change during exertion. It can be seen that don't lean back during the action to avoid injury. The leg is isotonic contraction, and the leg muscles contract and the length changes during the exertion. In order to improve the exercise effect, it is best not to let the barbell touch the ground when kneeling.

2. Action essentials: Stand with your feet in a figure of eight, put the barbell in front of you, bend your knees, and hold the barbell with both hands. The grip distance is about shoulder width or wider than your shoulder. Raise your head slightly, hold your chest out, keep your back tight, your hips up, and lean forward about 45 degrees. Leg muscles stretch hard, knees lift the bell, pause. Then bend your knees and slowly descend to recover. The process of lifting the bell by hard pulling is basically the same as that of lifting the bell by weightlifting. When lifting the bell, you must not include the chest bow, your back should be tightened, your head should be raised, and your upper body should always be in a tight state.