1. Send the mountain bike for maintenance.

2. Check the braking device.

3. Clean the chain, front dial, rear dial and toothed plate.

4. Refueling places include chains, front and rear dials, all movable seats, brake lines and speed change lines.

Mountain bikers have fitness functions:

1 can prevent brain aging and improve the agility of nervous system.

2. It can improve the cardiopulmonary function, exercise the muscle strength of lower limbs and enhance the endurance of the whole body.

3, can lose weight. When riding a bicycle, due to periodic aerobic exercise, exercisers consume more calories. Can you get a significant weight loss effect? Fruit.

4, can improve sexual function. Riding a bicycle for 4-5 kilometers every day can stimulate the secretion of estrogen or androgen, enhance sexual ability and contribute to the harmony of husband and wife's sexual life.

5, can prolong life. According to the investigation and statistics of relevant international committees, among all kinds of occupations in the world, postmen have the longest life span, one of the reasons is that they often ride bicycles when delivering letters.