Speed arm device, boxing arm strength device, multi-functional rotary arm 8-shaped fitness boxing speed device

The 8-shaped arm strength trainer, also known as the 8-shaped tensile or 8-shaped wrist strength trainer, is a common fitness equipment mainly used to exercise the strength of the arms, wrists, and shoulders. It usually consists of two handles and a spring or rubber band connecting the handles, shaped like the number "8".
Here are some characteristics and usage methods of the 8-character arm strength trainer:
characteristic:
Compact and portable: The 8-shaped arm strength trainer has a small volume and is easy to carry, making it suitable for use at home, in the office, or outdoors.
Adjustable resistance: Some 8-shaped arm strength trainers can change resistance by adjusting the tightness of springs or rubber bands to meet different exercise needs.
Multifunctional: In addition to exercising arm strength, it can also exercise muscles in different movements and postures, such as the wrist, shoulders, and back.