There are more and more investigates indicate that the decline of back extensor s endurance relative to chronic backache s occurrence,especially the group of muscle which maintain the stabilization of the spine,for example,the multifidus.

the modified kessler s suture and hte "8-shape" suture for the extended tendon in the dorsal palms .

Dorsal vertebra back extensor group soft tissue harm on clinical more common,but causes the chest pain partner to tire of the oil,the mouth has the fish fishy smell symptom to be extremely rare.

Clinical study of rapid traction of flexion or stretch for lumbar disc herniation;

The results show the following characteristics: the ankle muscle force of grade A jumpers is not satisfactory; knee and ankle extensor centrifugal moment of force of grade A is obviously stronger than that of grade B; grade A jumpers tend to be better in knee and ankle centrifugal muscle force.

The flexors and extensors of hip is measured after eight weeks strength training.

In this article, the author studies the age and gender characteristics of knee extensor isokinetic muscle strength development of 240 primary pupils aged 7-12.