You can find dozens of different techniques and routines of qigong. Some are as simple as controlling breathing and meditation or doing small repetitive motions with the body.
Other types of qigong are suitable for martial arts exercise. You might see martial artists practicing in the public parks some kinds of qigong that are the intricate and fast martial arts routines. Some routines are appropriate for martial artists, and some are more appropriate just for improving health.
Qigong and tai chi practitioners generally say that the exercises calm them and help them to feel better and “more energized”. They say that they feel more energetic after a period of exercise than before they started.
The rhythmic motions tone the muscles and might help to improve balance and stamina. People learn to control their limbs and body better, and the crouching stances in many of the more physical styles help to develop stronger legs. It can be used for martial arts training.
There isn’t a medical consensus among scientists about its healing virtues or life-extending effects. There isn’t a consensus about the claims of practitioners to control objects or people away from their bodies by qi either.