Stretcher is a kind of equipment suitable for mass fitness. The advantage of using a stretcher is that biceps brachii is a muscle with two muscle heads, and its main function is to bend the arm. Another muscle, the triceps brachii, is also used when bending the arm. However, only when doing some forearm lifting exercises, such as bending the high-position puller or anti-high-position puller toys, can the brachial muscles be fully exercised. In addition, the flexor brachialis, the main muscle of the upper forearm, also plays a lot of roles in arm flexion, which can be strengthened by lateral bending of the tensioner.

Precautions for use:

1. Don't wear sharp valuables when using the stretcher, so as not to affect the exercise and cause injury or unnecessary loss.

4. Before using the wire spring tensioner, check whether the hook structure and installation of the wire spring are firm, so as to avoid slippage and injury accidents.

3. The maximum pulling distance of the steel wire spring tensioner is 150 cm, and the pulling force of each spring is about 6 kg. Don't stretch it too long, or it will make the wire spring lose its elasticity.

4. Wire springs, wire ropes or rubber strip (belts or tubes) that have been stored for a long time shall not be used again if they have rusted, hardened or aged, so as not to be broken during stretching.

5. Before using the wire spring tensioner or rubber band tensioner, one end of the tensioner should be firmly fixed on other objects to prevent slipping or sudden rebound from causing injury accidents.

6. Wear long-sleeved sportswear and sweatpants when using a wire spring stretcher. Don't cling to the body of the steel wire stretching machine to prevent the steel wire spring from pinching the skin and hair when stretching and contracting.

Once, when using the wire spring tensioner, each wire spring must be hooked on the big ring and pulled by hand holding the handle. Don't pull with several big rings, in case the force is too concentrated on the wire spring ring, which will cause the wire spring to break.

⒏ After using the tensioner, be sure to wipe off the rubber strip, the wire spring and the sweat on the handle or handle. Rub some lubricating oil on the wire spring, heavy hammer wire rope, pulley and lever shaft every once in a while to prevent rust.

(9) When the action is completed, it is necessary to control the spring, the pimp or the heavy hammer to recover slowly with muscle strength, which can not only avoid the collision and overlapping phenomenon of the spring, the pimp or the heavy hammer wire rope, but also give full play to the unique advantages of the stretcher's "retreat" movement and stimulate the muscles to the maximum extent, thus obtaining the best sports effect.

⒑ Before using the pulley weight tensioner, the tightness of the tensioner must be checked. Don't grab the pulley and hammer the tensioner. Pick up the pulley weight tensioner, which is recommended to prevent equipment failure and scattering from causing injury accidents. It is necessary to check whether the bolts of the pulley weight tensioner are inserted in place, whether the screws are loose and fall off, whether the wire rope is firm, and whether the grip and pulley are installed firmly, so as to prevent problems before they happen.

(1) In the process of using a stretcher, we should form a good habit of using protective articles such as palm protector, grip belt, half-finger gloves, knee pads, belts and wrist pads.