How effective is crossfit training and is it bad for your health?

Any well-structured workout is effective and healthy. As a rule, if you are a beginner, you start with a coach individually or in a group. Groups are divided into different levels of training. If there is no such thing in your room, then you should think about whether they will injure me ?! If you are working with a personal trainer, then you should pay attention to how your trainer monitors the technique of performing exercises, the purity of your pulse, and in general should always be near you and constantly correct something. If you don't notice this, send such a coach to train others. But you can also start doing CrossFit yourself. Buy a heart rate monitor. Watch your pulse, monitor your well-being and slowly raise your bar every week. The main thing is not to throw yourself into the cliff.

It depends on what you mean by effectiveness ...)

Are effective for weight loss - yes.

Are effective for pumping up the ass - no.

Training is not harmful if you are physically prepared for it. I can't say that CrossFit will work for beginners. You need a good respiratory system and a normal cardio zone.

Even some adult men at the first workout spit out lunch ...