PLANTAR PRESSURE OF FOUR MOVEMENTS IN SOCCER

The present study aimed to compare the plantar pressure among four soccer movements and to identify the plantar areas where high pressure was exerted. 15 male soccer players participated in the study. Four movements were conducted: running, sideward cutting, 45-degree cutting, and jump landing. Each footprint was divided into 10 masked areas for analysis. One-way ANOVA with repeated measures showed differences (P < 0.05) in peak pressure and pressure-time integral in all masked areas among the four movements. As compared to running, sideward cutting and 45-degree cutting had higher peak pressure (P < 0.05) under the second toe, medial forefoot, medial arch, and medial heel, while jump landing had lower peak pressure under the medial forefoot and lateral forefoot (P < 0.05). Pressure-time integral showed that sideward cutting and 45-degree cutting had higher values (P < 0.05) than running under all masked areas except on the lateral forefoot and the lateral arch. Among these movements, higher pressure was found on the medial side of the plantar surface and these areas may have higher risk of injury

CHANGES OF KINEMATICS IN ROPE SKIPPING AFTER FATIGUE

Rope skipping is a popular indoor exercise which enhances cardiorespiratory fitness. A lot of researches investigated the physiological effects of rope skipping. However, biomechanical analysis in this exercise was limited. The purpose of this study was to compare the changes of kinematics of double-leg forward skipping, before and after fatigue. One male subject participated in the study. The subject skipped for 2 minutes and 55 seconds. Results showed that, after fatigue, the subject decreased the jump height, more trunk and head movement in the forward-backward direction, and might recruit more quadriceps and hamstrings muscles during skip

COMPARISON OF SHOCK ATTENUATION BETWEEN SPORT SHOES WHEN LANDING FROM VERTICAL JUMP

Many sports require particitlanls to perform jump landing. However, the peak impact force at landing was about 7.1 body weight, which might lead to injury. Basketball shoe, running shoe, cloth sport shoe, r,nd barefoot were selected in the present study. The purpose of this study was to investigate the impact when landing from vertical jump. Eleven subjects with no reported lower limb injur:os were recruited. After warm-up session, each subject performed 12 jumps. The sport shoes were assigned to subjects randomly. In ANOVA analysis, significant diHerence only '3xisted in time to first impact peak force, F=8.99, p=.001. The results showed that muscles cl ankle joint (0.0688s) could not react to first impact peak force (0.0174s). Same as previous studies, results were affected by subjects' perception. In conclusion basketball and running shoes provided better shock attenuation in rearfoot

EFFECTS OF DIFFERENT TENNIS SHOES ON THE PERFORMANCE OF RECREATIONAL TENNIS PLAYERS

The purpose of this study was to evaluate the effects of different tennis shoes on the performance of recreational tennis players. Twenty male recreational tennis players participated in the study. Four different tennis shoes were employed and the sequence was randomized for each subject. Three on-court performances (groundstroke, service, and shuttle-run) were chosen and one-way ANOVA with repeated measures (

CAN LABORATORY-BASED BIOMECHANICAL TEST RESULTS REFLECT THE PERCEIVED COMFORT DURING OVERGROUND RUNNING?

The purpose of this study was to measure the relationship between laboratory-based biomechanical test results and the perceived comfort of subjects obtained from overground running. Twelve male runners were recruited (age=20.3 ± 0.8 years, weight=61.1 ± 5.1 kg, height=171 ± 4 cm). They participated in three tests: Heel Cushioning Test, Rearfoot Movement Test, and Perceived Comfort Test. Human pendulum device with a controlled impact velocity at 1.15m/s was used in the first test to measure the heel cushioning properties. A digital camera was located posterior to the treadmill to record the rearfoot movement in the second test. And a questionnaire that consisted of three questions was used to measure the percevied comfort after overground running. The correlations between variables of Heel Cushioning Test and Perceived Comfort Test ranged from low (r = 0.118) to mediate (r = -0.564), and the correlations between variables of Rearfoot Movement Test and Perceived Comfort Test ranged from low (r = 0.160) to mediate (r = -0.563). Peak force plays an important role in determining the comfort rating. Loading rate was negatively related to perceived comfort in heel cushioning. Total rearfoot motion was found to contribute most in perceived comfort in medio-lateral control