Fast thin arm movement (1):
Bend your knees, your hips are parallel to the chair surface, put your hands back on the chair to support your body, slowly move your hips to the ground with the strength of your arms, and then lift them to the parallel chair surface. Repeat 20 times.
Fast thin arm movement (2);
Hold a 3-5 pound dumbbell in your right hand, keep your upper arm still, lift your forearm, and then slowly lower it. Do it 20 times with each hand.
Fast thin arm movement (3):
Hold a dumbbell of 3-5 kg in the forehand, keep the upper arm in place, raise the forearm, then slowly put it down and repeat for 20 times.
Fast thin arm movement (4):
Stand with your feet together and your back straight. Hold the dumbbell with both hands, lift it to parallel shoulders, then slowly put it down and repeat it 20 times.
Fast thin arm movement (5):
Stand with your feet together and your back straight. Hold the dumbbell with both hands, lift it until your hands are straight, then slowly put it down and repeat it 20 times.
Fast thin arm movement (6):
Lie prone and then do knee compressions, repeat 20 times.