Training intensity is the primary factor that determines whether fitness brings positive or negative effects to the body. Too much is not enough, no matter what kind of fitness, overtraining will have a negative impact on the body.

Different fitness methods/training programs will have different effects on the body.

1. Relatively speaking, outdoor sports are more likely to make people's skin aging than indoor sports, that is, they look old.

2. Pure aerobic exercise is easier to make the body aging than strength training.

Repair is greater than loss is a healthy state, and loss is greater than repair is an aging state.

weightlifting

Pure strength or focus on strength training projects such as Hercules, weightlifting, competitive bodybuilding and so on. It will also accelerate the aging of the body to a certain extent, mainly reflected in irreversible injuries such as joint wear. In addition, high-intensity strength training will actually make people "ugly". I can assure you that most of these strength-based sports are ferocious rather than smiling during training. These ferocious expressions will deepen facial wrinkles. In addition, holding your breath during long-term heavy-load training will make the blue veins on your face and head and neck more prominent, which will also affect your appearance.