With the continuous passage of time and the growth of age, tissues and organs gradually degenerate, the function of the brain's thermoregulatory center decreases, and the sensitivity to environmental temperature decreases. The electric fan has large air volume, strong and concentrated wind speed and large air conditioning. If you are not careful when using it, you will catch a cold and even cause facial paralysis. Hand-cranked banana fans can control the speed of wind speed and air volume according to climate change and their own conditions, and can avoid disadvantages and nip in the bud. In addition, the banana fan is easy to carry, and it is also a great pleasure for people to enjoy the cool outdoors, get together with the elderly, talk about the past and evaluate the present, and enjoy the cool, repel mosquitoes and cool off the heat.
(2) Promote upper limb joints.
It is the upper limb, which needs the coordination of joints and muscles of fingers, wrists and shoulders. In midsummer, people often shake their fans to enjoy the cool, which is a good opportunity for upper limbs, joints and muscles. Shaking a fan can not only promote the blood circulation of muscles, but also increase the flexibility of upper limb muscle strength and the coordination of joints. Experts believe that the long-term lack of shoulder joint is one of the important causes of scapulohumeral periarthritis. In summer, shaking the fan is one of the best ways of shoulder joint activities, which can promote the joints and muscles of shoulder joint to be exercised and strengthened, thus effectively.
(3) consciously shake the fan with your left hand to prevent cerebral hemorrhage.
Rocking fan is a kind of unilateral limb exercise, which can not only exercise the joint muscles of limbs, but also exercise the contraction and relaxation functions of cerebral vessels. Because of the functional orientation of the cerebral cortex, the control of the body is cross: the left hemisphere dominates the right limb and the right hemisphere dominates the left limb. However, people are always used to using their right hands, and their left hands exercise less, resulting in more exercise in the left hemisphere and less exercise in the right hemisphere.
Statistics show that more than 60% of cerebral hemorrhage in the elderly is caused by microvascular rupture in the right hemisphere. This is because they are used to using their right hands for a long time, which makes the blood vessels in the right hemisphere, which dominate the activities of the left limb, not exercised and relatively fragile.