Stand at attention, stand up straight, hold the water bottle with both hands, hold your arms high above your head, then slowly withdraw your left hand, extend your right hand upwards, then extend your left hand upwards and slowly withdraw your right hand, and practice the above actions alternately with both hands until your arms feel tired. Fitness exercise effect: this can accelerate the burning of arm fat, thus achieving the effect of slimming the arm.

2. Skipping rope and thin arms

If female friends are worried that lifting dumbbells will exercise their muscles, skipping rope is a more suitable exercise for them, and it is really feminine. Skipping rope has two properties: fun and practicality. It can also exercise people's physical coordination ability and improve their flexibility. It can be said that it is very popular.

Step 3 stretch

The parts of stretching exercise are the shoulders and forearm of the body. Prepare two dumbbells, weighing 1 to 2 kg. Stand up straight, separate your feet until you touch the same width, hold a dumbbell on each side of your hands, lift your hands down to be parallel to the ground, then bend your elbows, straighten them again, and repeat elbow bending and straightening 1 min.