The reason for this is the following：

1, moderate and low intensity running can relieve the depression of adult college students, improve the stability of cerebral cortex function, make cerebral cortex have the ability to keep excitation inhibition and rhythm conversion for a long time, improve the coordination of motor center, and make the rhythm of muscle contraction and relaxation more accurate. Moreover, this kind of aerobic endurance exercise with low intensity and long exercise time can avoid or alleviate the physical pain caused by the 1000 meter running test.

2. Fitness long-distance running can improve the function of respiratory system and cardiovascular system. Scientific practice has proved that long-term rhythmic deep breathing can make people inhale a lot of oxygen. If the oxygen intake exceeds 7-8 times of usual, it can inhibit the growth and reproduction of human cancer cells. Secondly, long-distance running also improves the oxygen supply state of myocardium, accelerates myocardial metabolism, thickens myocardial fibers and enhances myocardial contractility, thus improving the working ability of the heart.

3, fitness long-distance running is conducive to a comfortable mood and a happy spirit. Because this kind of long-distance running does not pay attention to the outcome of the competition, it only seeks to exercise in a relaxed and happy way, so it is very conducive to alleviating the mental and psychological tension brought about by high-tempo and high-intensity sports in modern society. According to medical experts, this kind of relaxed and pleasant exercise can best promote the release of endorphins, a polypeptide substance in the body, thus causing lasting euphoria and sedation. In addition, because long-distance running makes people full of optimism, it helps to increase appetite, strengthen digestive function and promote nutrient absorption.

Action essentials

1, head and shoulders

Keep the head and shoulders stable. Keep your head forward. Don't lean forward unless the road is uneven. Keep your eyes on the front Relax your shoulders properly and avoid having a chest.

2. Arms and hands

The swing arm should move back and forth with the shoulder as the axis, and the range of left and right movement should not exceed the center line of the body. Fingers, wrists and arms should be relaxed, and the elbow angle should be about 90 degrees.

3. Trunk and buttocks

Stand upright from the neck and abdomen instead of leaning forward (unless accelerating or going uphill) or leaning back, which is beneficial to breathing, balance and striding. Don't shake your torso from side to side or fluctuate too much. Actively send your hips when your legs swing forward, and pay attention to the rotation and relaxation of your hips when running.

4, waist

Keep your waist naturally upright, not too straight. The muscles are slightly tense, so keep the trunk posture and pay attention to buffering the impact of the foot landing.

5, thighs and knees

Swing your thighs and knees forward, not up. Any lateral movement of the leg is unnecessary, and it is easy to cause knee joint injury, so the front swing of the thigh should be positive.

6, calf and achilles tendon

The foot should fall about a foot in front of the body, close to the midline. Don't cross the calf too far, so as not to strain the achilles tendon due to excessive stress. At the same time, we should pay attention to the cushioning of calf muscles and achilles tendon when landing, and the calf should actively scrape the ground backwards when landing, so that the body can actively move forward. In addition, the calf should swing forward, and the foot should move forward as far as possible, and it can't be everted or everted, otherwise it will easily damage the knee joint and ankle joint. You can check your footprints when running on the beach for reference.

7. Heels and toes

If the stride is too big and the calf stretches too far forward, it will follow the ground with its feet, which will cause braking reaction and cause great damage to bones and joints. When landing correctly, land with the middle of the sole of your foot, so that the impact force can quickly spread to the whole sole.

People's Network-Improving College Students' Physical Fitness