We report the effect of electrical acupuncture therapy (Tsukuba method) on 10 patients with primary osteoarthritis of the knees.
We applied acupuncture to the sites of muscle induration and tenderness determined by physical examination and palpation. Pains during walking and when standing -up were releaved in all patients who received the treatment. Activities in daily life showed various responses to our treatment. No improvement in symptoms was found in three patients when they were going up and down staircases or sitting on tatami with their knees fully flexed. We consider that these differences in response are related to the degree of myatrophy, contracture, and stenosis of the joint space.

Objective：To investigate the lower limb skeletal muscle stiffness in healthy individuals.

Methods：Using ultrasonographic elastography, we measured the degree of stiffness of the rectus femoris and medial head of the gastrocnemius in healthy individuals and investigated the relationships between muscle stiffness and thickness, a quantitative measure of muscles, and between muscle stiffness and brightness, a qualitative measure of muscles. Furthermore, relationships between muscle stiffness and age, body weight, and body mass index (BMI) were also studied.

Results：Rectus femoris stiffness was positively correlated with muscle thickness. Rectus femoris stiffness had a weak negative correlation with muscle brightness and a weak positive correlation with body weight and BMI. Stiffness of the medial head of the gastrocnemius showed no correlation with any of the study variables. Muscle stiffness did not correlate with age in either of the muscles. No sex-related difference was found in the degree of muscle stiffness.

Conclusion：Although rectus femoris stiffness was associated with muscle thickness and brightness, these relationships were not observed for muscle stiffness of the medial head of the gastrocnemius. The data suggested that rectus femoris stiffness reflects the quantitative and qualitative states of the muscle, and the presence of such relationships may depend on the location of the muscle.