The post-menarche group showed an increased noncontact anterior cruciate ligament injury risk, due to their greater knee loads, compared with the pre-menarche group.
[Purpose] The aim of the present study was to construct an integrated rehabilitation
exercise program to prevent chronic pain and improve motor ability in cases of ankle
injury and re-injury. [Subjects and Methods] Twenty-six male soccer players who required
functional strength exercises due to repeated ankle injury were the subjects. A 12-week
rehabilitation exercise program was constructed with the aim of improving muscle strength
in the ankle and dynamic coordination of the lower limb. Muscle strength and dynamic
coordination were evaluated using the Y Balance Test, and isokinetic muscle strength of
ankle dorsiflexion, plantarflexion, inversion, and eversion were measured before and after
the 12-week program. [Results] Following 12 weeks of rehabilitation exercise, there were
statistically significant improvements in the ratios of dorsiflexor strength to
plantarflexor strength, eversion strength, and inversion strength on the left side. The
other variables showed no significant changes. [Conclusion] The rehabilitation exercise
program for chronic ankle instability helped to reduce pain, and to restore normal joint
range of motion, muscle strength and endurance, and functional ability. Active protocols
to improve complex functions need to be developed to complement these results.
[Purpose] The purpose of this study was to determine potential predictors of functional
instability of the knee and ankle joints during single-leg drop landing based on the prior
history of injury. [Subjects and Methods] The subjects were 24 collegiate soccer players
without pain or dysfunction. To compare the differences between the stable and unstable
sides during single-leg drop landing, 8 motion analysis cameras and a force plate were
used. The Cortex 4 software was used for a biomechanical analysis of 3 events. An
independent t-test was used for statistical comparison between both sides; p<0.05
indicated significance. [Results] The knee joint movements showed gradual flexion in the
sagittal plane. The unstable-side ankle joint showed plantar flexion of approximately 2掳
relative to the stable side. In the coronal plane, the unstable-side knee joint differed
from the stable side in its tendency for valgus movement. The unstable-side ankle joint
showed contrasting movement compared with the stable side, and the difference was
significant. Regarding the vertical ground reaction force, the stable side showed maximum
knee flexion that was approximately 0.1 BW lower than that of the unstable side.
[Conclusion] Increasing the flexion angle of the knee joint can help prevent injury during
landing.
The purpose of the study was to investigate the effects of gymnasts shoes on risk factors of anterior cruciate ligament injuries during drop-landing followed by vertical jump in female gymnasts. Thirteen female gymnasts were recruited and performed randomly drop-landing followed by vertical jump in height of her knee with and without shoes. Kinematics and ground reaction data were collected to estimate the anterior cruciate ligament injuries risk factors. Data were analyzed with paired samples t-test with Bonferroni correction. Female gymnasts with shoes showed more reduced thigh maximum adduction angle, and knee maximum extension moment than without shoes. Female gymnasts with shoes showed more increased shank maximum abduction angle than without shoes. In conclusion, Female gymnasts with shoes reduced anterior cruciate ligament injuries risk factors.
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