You're asking which is better, single shot or double shot? Fitness elastic stick is better than double-edged stick.

At present, it is basically a double shot, mainly depending on your own needs. If you are alone or don't think about the long term, you can shoot alone.

Fitness stick elastic stick is a kind of weight loss equipment in life, which can help you lose weight through exercise. It is an instrument to stimulate muscles. Regular exercise can reduce some fat.