The purpose of this study was to investigate the characteristics of joint movements and muscle activities of the subjects who have functional ankle instability (FI) during single leg landing. 12 high school soccer players participated in the study. They were classified into two groups based on the presence or absence of FI. Subjects performed forward and lateral single leg jump landing. During these tasks, muscle activities of gluteus maximus (GMax), gluteus medius (GMed), adductor longus (AL), rectus femoris (RF), gastrocnemius medialis (GM), peroneus longus (PL) and tibialis anterior (TA) were measured via electromyography. Joint motions were also recorded through high-speed video cameras and analyzed by the motion analysis software. The subjects with FI demonstrated significant delays of PL and GMed muscle reaction time during the lateral landing. Similarly, the degree of knee valgus was greater in the subjects with FI than that of the subjects without FI during the same movement task. No difference in %MVC was observed between the groups. These results showed that the subjects with FI have dysfunctions of hip and knee as well as ankle joints. The functional impairments around these joints could contribute to the risk of ankle sprains.

Patients with exercise-induced disease of the knee joint often exhibit a decrease in tone of vastus medialis obliquus. This study examined the effects of Taibai (SP3) acupuncture on quadriceps femoris function during knee joint extension.

Nine healthy subjects were enrolled. To examine the effects of SP3 acupuncture on knee joint extension, three different paradigms were compared : (i) stimulation at an acupoint (SP3), (ii) stimulation at non acupoint, and (iii) no stimulation. The knee joint was flexed to approximately 60°. Three isometric contractions were performed at 60% of the maximum voluntary contraction for 5s each. A surface electromyogram (EMG) was recorded during acupuncture stimulation before and after knee joint extension. The acupuncture needle was retained in position while EMG measurements were obtained from vastus medialis obliquus, vastus medialis longus, rectus femoris, and 4 sites within vastus lateralis at 5, 10, and 15 min after stimulation.

SP3 acupuncture significantly decreased the integrated EMG values from vastus medialis obliquus 15 min after the cessation of stimulation.

Using SP3 acupuncture, an improvement in vastus medialis obliquus function was observed 15 minutes after stimulus administration.

We opened a questionnaire towards 814 people (Teachers) who run after school activity to find out the need in adopting of sports instructors. (31.4% answered out of 814 people)

As a result we found out that a lot of the teachers would like to have a sports trainer to help especially in the aspects of injury and preventing injuries. But the actual percentage of adopting the trainers where very low indeed (32%).

At clubs where they have adopted trainers, they have expectations of better results and prevention of injuries.

On the other hand, clubs which did not have trainers where due to lack of budget, for the coach not knowing about sports trainers which resulted in not adopting sports trainers.

We then concluded that this issue of adopting sports instructors in after school club activity is a problem which needs to be thought through.

The purpose of this study was to investigate the injury rate of 634 people who participated in the Adult and Youth Aikido Competition World Championship. As a result, the injury rate was 15.3 A-Es. Almost all injuries were the upper and lower limb, and it hardly happened in the head, neck, and trunk during the competition period.