Summary: Gym is the first choice for professional fitness. You can build big muscles. Endurance, strength hero.
Playground sports (street fitness/self-respect sports) My favorite:
Self-weight exercise, the maximum weight is also its own weight, and there is a bottleneck in the large dimension of muscle breakthrough. Arm and back push-ups, somersault push-ups (Superman push-ups), turning over, etc. These rapid movements exercise the core explosive power, overall health and cardiopulmonary function; The front stage, the back stage and the downwind flag, these static movements are very balanced, which makes you feel and understand your body more. Because it is self-respecting, the number of groups will be more, and outdoor is suitable for running and aerobic exercise, so body fat will generally be lower. I have a normal diet, don't take any supplements, and occasionally have some hamburgers and potato chips (myself). Plus outdoor, the gym has no air conditioning and heating. Throughout the year, I am not afraid of heat in summer and cold in winter, and I can also hone my willpower. It will be darker than the gym.