Age pattern and gender characteristic in relation to the natural development of dynamic isokinetic muscle strength of middle school students
The author probed into the age correlation and gender characteristic in relation to the natural development of dynamic isokinetic muscle strength, used Kinetch isokinetic muscle strength testing system to evaluate the test of dynamic isokinetic muscle strength of 240 average middle school students ages 13-18, and revealed the following findings: From age 13 to age 18, the maximum muscle strength and output power of flexors and extensors of upper and lower limbs of male students are growing continuously; starting from age 14, the said maximum muscle strength and output power begin to grow rapidly; in every age group, the muscle strength of male students are more powerful than that of female students; the age of 14 is a sensitive period for the rapid growth of dynamic isokinetic muscle strength of male students; the maximum muscle strength and output power of flexors and extensors of upper and lower limbs of female students are also growing continuously in the same period, but their growing speed is obviously slower than that occurred to male students; after age 16, such a growth begins to slow down,and the difference between male and female students becomes bigger and bigger in relation to such a growth.