The arm circumference reflects the degree of development of arm muscles. Upper arm circumference includes upper arm tension circumference and upper arm relaxation circumference. The average difference in arm circumference is 2-3.5cm for males and 0/.5-2 cm for females. Measure the thickest part of the upper arm with a tape measure. Maximum girth of upper arm/tension girth of upper arm: girth of the cross section perpendicular to the axis of upper arm where biceps brachii of upper arm expands at its maximum when biceps brachii of upper arm contracts.

Fitness is a kind of exercise, such as all kinds of unarmed aerobics, rhythmic gymnastics, rhythmic gymnastics, and all kinds of self-resistance movements. Gymnastics and yoga can enhance strength and flexibility, increase endurance, and improve the ability to coordinate and control all parts of the body, thus making the body strong. If you want to relieve stress, exercise at least three times a week.

relevant information

(1) To do fitness exercises in winter, warm-up activities should be sufficient, especially outdoors. First, make full preparations for warm-up, and then carry out higher-intensity fitness exercises.

(2) The thickness of clothes should be suitable for winter fitness activities, and the head, back and feet should be kept warm. When you exercise outdoors, you should pay attention to keep warm. After exercise, don't stand in a windy place and blow. Go back indoors as soon as possible, dry your sweat and put on clean clothes.

(3) The environment should be clean and comfortable. When you exercise indoors, you must keep the indoor air circulating and fresh.

(4) Appropriate exercise methods In winter fitness, it is necessary to improve the intensity and intensity of exercise, increase the number and frequency of exercise, increase the content of aerobic exercise, and extend the exercise time accordingly, so as to improve the function, develop special qualities, consume body fat and prevent excessive accumulation of fat.