The handstand can't last long. After a long time, in addition to tinnitus, brain swelling and dizziness, it will also cause direct damage to vision. If the handstand time is too long, the intraocular pressure will increase, resulting in decreased binocular vision, and then visual distortion and visual field defect will occur. Therefore, handstand is also harmful, so we must master our own time and avoid adverse health conditions.

Extended data:

1, handstand can not only make people more fit, but also effectively reduce facial wrinkles and delay aging.

2, handstand is more helpful to improve people's intelligence and reaction ability. People's intelligence level and reaction speed are determined by the brain, and handstand can increase the blood supply of the brain and the sense of superiority in various situations.

It is reported that in order to improve students' intelligence, some elementary schools in Japan make students stand upside down for five minutes every day. After handstand, students generally feel clear-eyed, refreshed and clear-headed. Because of this, medical experts attach great importance to handstand: five minutes of handstand is equivalent to two hours of sleep. Other countries, such as India, Sweden and the United States, also actively advocate people to do handstands every day.

The handstand fitness method is very popular abroad. This method has a good health care effect on the following symptoms: insomnia at night, memory loss, sparse hair, loss of appetite, inattention, depression, low back pain, hard shoulders, decreased vision, decreased energy, general fatigue, constipation, headache and so on.

5. handstand is commonly known as "holding the top", "upside down" in Han Dynasty, "retrograde" in Eastern Jin Dynasty, "throwing down" in Tang Dynasty and "vertical dragonfly" in Ming Dynasty. It is also a final posture of western yoga at present. Handstand fitness has long been practiced and proved by sports, martial arts and medical circles in the world and history. At present, it is very popular in America, Japan, Britain, Sweden and Germany.