“Kickboxing is a very popular form of working out, and classes are offered at many gyms. The American Council on Exercise offers these suggestions to help you safely begin a kickboxing regimen:
Avoid working too hard and too long, beyond the point of fatigue.
Avoid using weights when kicking or punching. This could injure your joints.
Don't lock your joints as you kick or punch.
As a beginner, don't kick too high or too hard. You should first learn the proper technique and give your joints and muscles time to adjust.”