1. Before use, check whether the connecting parts of the boom are firm and not loose.

2. Choose an arm strength device suitable for your body level to avoid pulling muscles.

3. When in use, fasten the safety belt on the handle of the arm strength device on your wrist.

4. When using, you should choose a relatively spacious venue to exercise, so as not to get rid of it and hurt people.

5, when using, should be uniform.

As for the brand, the quality of Ruiyate's arm stick will be better. I opened a fitness equipment store myself, and Ruiyate's arm sticks sell best, and customers have the least complaints.