• 대한물리의학회지
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• 제3권4호
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• pp.225-233
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• 2008

Purpose : The purpose of this study was to investigate changes of muscle strength, ROM and proprioceptive function as before & after ankle taping in soccer players. For this study fifteen sports club whose had no ankle injuries were volunteered. Methode : Fifteen healthy male in soccer players participated in this study. Biodex pro system3 was used to measure isokinetic muscle strengths at $60^{\circ}$/sec angular velocity. Performances of ankle joint were measured peak torque, total work, average power, total work. To measure proprioceptive function used goniometer. Results : 1. proprioceptive sensation error were significantly differences by before & after taping(p<.05). 2. Compare of total work of dorsi flexion plantar flexion weren't significantly differences by before & after taping(p>.05). 3. Compare of average power of dorsi flexion weren't significantly differences by before & after taping(p>.05). 4. Compare average power of plantar flexion were significantly differences by before & after taping(p<.05). 5. Compare average peak torque of dorsi flexion weren't significantly differences by before & after taping(p>.05). 6. Compare average peak torque of plantar flexion were significantly differences by before & after taping(p<.05). Conclusion : Taping can have propriocetive aberrative angular measure, power & peak torque of plantar flexion were significantly differences. But, total work of dorsi flexion plantar flexion and power & peak torque of dorsi flexion weren't significantly differences.

• The Journal of Korean Physical Therapy
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• 제27권5호
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• pp.345-350
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• 2015

Purpose: This study was conducted to determine the effects of ankle joint position during closed kinetic chain (CKC) exercise on knee extensor strength and balance in patients with chronic stroke. Methods: Sixteen patients with chronic stroke participated in the study. Participants were randomly assigned to two groups: $15^{\circ}$ ankle joint plantar flexion group (n=8) and ankle joint neutral group (n=8) during CKC exercise. All participants underwent conventional physical therapy for 30 minutes. In addition, the experimental group ($15^{\circ}$ ankle joint plantar flexion group) and control group (ankle joint neutral group) participated in a 20-minute CKC exercise program. In both groups exercise was performed three times a week for four weeks. Outcomes including knee extensor strength and balance ability (Five times sit-to-stand test, Timed up and go test, and Balancia) were measured before and after exercise. Results: Significant differences in knee extensor strength and balance ability were observed between pre- and post-exercise in all groups (p<0.05). The improvement of knee extensor strength and dynamic balance was significantly higher in the experimental group than in the control group (p<0.05). Conclusion: These findings demonstrated that $15^{\circ}$ ankle joint plantar flexion during closed kinetic chain exercise is effective in improvement of knee extensor strength and dynamic balance in patients with chronic stroke.

• 대한물리의학회지
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• 제14권4호
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• pp.153-162
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• 2019

PURPOSE: This study compared ankle joint exercise and thigh exercise on the isometric strength of the lower limb and balance ability. METHODS: Twenty-seven subjects were divided into ankle joint exercise (AEG, n=9), tight exercise (TEG, n=9), and control group (CON, n=9). AEG and TEG performed ankle joint and tight exercises three times a week for four weeks. The following were measured before and four weeks after each exercise: isometric strength at knee flexion and extension of the lower limb; isometric strength at ankle plantar flexion and dorsiflexion of the lower limb; static balance of trace length and C90 area; and the dynamic forward, backward, leftward, and rightward balance for each region. RESULTS: The results showed that the isometric strength of plantar flexion (p<.05) was increased significantly in AEG compared to those in TEG and CON. The dynamic leftward (p<.05) and rightward balance (p<.05) were increased significantly in both AEG and TEG compared to that in CON. On the other hand, the static balance of the trace length and C90 area, isometric strength of ankle dorsiflexion, knee flexion and extension of the lower limb, and dynamic forward and backward balance did not show significant differences between the groups. CONCLUSION: Ankle joint exercise improves the isometric strength of plantar flexion compared to tight exercise.

• PNF and Movement
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• 제16권1호
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• pp.51-58
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• 2018

Purpose: The aim of the present study was to investigate the effects of proprioceptive neuromuscular facilitation (PNF) and taping interventions on balance ability, joint position sense, and ankle joint strength. Methods: Thirty subjects who had experienced an ankle sprain within the previous 3 months participated in this study. The subjects were randomly assigned to a PNF group (n=15) or a taping group (n=15). Before and after the interventions, ankle dorsi-flexion and plantar-flexion strength, joint position error, and total center of pressure movements in one leg while in a standing position were measured. Results: Regardless of the group allocation, ankle dorsi-flexion and plantar-flexion strength significantly improved after the interventions (p<0.05). Compared to preintervention measurements, joint position errors were significantly reduced postintervention (p<0.05). The PNF intervention significantly decreased the total lateral movement of the center of pressure in the one leg standing condition (p<0.05). Conclusion: Both PNF and taping interventions improved joint position sense and ankle joint strength. In common with the findings of a previous study, the PNF intervention improved balance ability. Further study is required to investigate the effects of various PNF and taping interventions on ankle performance in subjects with chronic ankle sprains.

• 한국운동역학회지
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• 제34권2호
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• pp.45-52
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• 2024

Objective: The purpose of this study was to measure the morphological characteristics of the foot and biomechanical variables of the lower extremity joints during vertical jump and investigate the relationship between foot morphology and biomechanics of vertical jump. Method: 24 men in their 20s (age: 22.42 ± 1.41 yrs, height: 173.37 ± 4.61 cm, weight: 72.02 ± 6.21 kg, foot length: 251.70 ± 8.68 mm) participated in the study. Morphological characteristics of the foot included the length of the first toe, the length of the second toe, and the horizontal length from the center of ankle joint to the achilles tendon (Plantar Flexion Moment Arm [PFMA]). Biomechanical variables were measured for plantar flexor strength of the ankle joint and peak angular velocity, moment, and power of the lower extremity joint during vertical jump. Results: There was a significant correlation between the length of the first toe and plantar flexion strength at 30°/s [r=.440, p=.016], the angular velocity of the metatarsophalangeal [MTP] joint [r=-.369, p=.038] while significant correlations between PFMA and the angular velocities of the knee joint [r=.369, p=.038] and ankle joint [r=.420, p=.021] were found. There were also significant correlations between the length of the first toe and the maximum moment of the hip joint [r=.379, p=.034], and the length of the second toe and the power of the hip joint [r=-.391, p=.029]. Finally, significant correlations between PFMA and the power of the ankle joint [r=.424, p=.019] and MTP joint [r=.367, p=.039] were found. Conclusion: Based on the results of this study, the length of the toe and PFMA would be related to the function of the lower extremity joint. Therefore, this should be considered when designing the functional structure of a shoe. Furthermore, this relationship can be applied to intensive training for the plantar flexors and toe flexors to improve power in athletic performance.

• The Journal of Korean Physical Therapy
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• 제13권2호
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• pp.445-452
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• 2001

The purpose of this study to compare the muscle performances (peak torque (PT), relative strength (RS), average power (AP), and total work (TW)) between taping group and non-taping group after 1 hour extensive exercise. Twenty healthy male subjects were evaluated in this study. Each subject was divided with taping(n=10) and non-taping group (n=10) randomly. Muscle performances were measured at 60 degree/sec and 180 degree/sec on the Cybex 770. The PT, RS, AP, and TW were measured before and after 1 hour extensive exercise. The results showed that taping group demonstrated significantly higher PT, RS, AP, and TW during ankle dorsiflexion and plantar flexion at 60 degree/sec than those of non-taping group, except for total work during ankle plantar flexion. At the 180 degree/sec, PT and RS was significantly higher during ankle dorsiflexion and plantar flexion in taping group than in non-taping group. This results suggest that lower leg taping could be useful to maintain muscle performances during sport activities.

• 국제물리치료학회지
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• 제10권2호
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• pp.1791-1796
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• 2019

Background: Vibration exercise after ankle surgery improves proprioception and ankle muscle strength through vibration stimulation. Objective: To examine the effects of vibration exercise on the ankle stability. Design: Randomized controlled clinical trial (single blind) Methods: Twenty soccer players were randomly divided into experimental group and control group. The Vibration exercise program was conducted 12 weeks and 3 times a week. Ankle joint proprioceptive sensory test and Isokinetic muscle strength test were performed using Biodex system pro III to measure plantar flexion / dorsiflexion and eversion / inversion motion. Results: The result of isokinetic test of ankle joint is showed significant improvement in all measurement items, such as leg flexion, lateral flexion, external and internal muscle forces, compared to previous ones by performing vibration movements for 12 weeks. However, in the comparison group, plantar flexor ($30^{\circ}$), eversion muscle ($120^{\circ}$), inversion ($30^{\circ}$) of limb muscle strength were significantly improved compared with the previous phase; was no significant difference in dorsi-flexion. There was no significant difference between groups in all the items. Conclusions: In this study, we analyzed the effects of rehabilitation exercise on soccer players who had reconstructed with an ankle joint ligament injury through vibration exercise device. As a result, we could propose an effective exercise method to improve the ability, and confirmed the applicability as an appropriate exercise program to prevent ankle injuries and help quick return.

• 한국융합학회논문지
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• 제12권8호
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• pp.61-66
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• 2021

본 연구는 초등학교 야구 선수들의 수직 점프 및 다리 근력과의 관계에 대해 알아보는데 목적이 있다. 대상자는 총 40명으로 실시하였다. 수직 점프를 알아보기 위해 수직 점프 측정기를 사용하여 측정하였으며, 다리 근력을 측정하기 위해 휴대용 도수 근력 측정기를 사용하였다. 다리 근력의 측정 부위는 양쪽 엉덩관절에 굽힘·폄·모음·벌림·안쪽 돌림·바깥 돌림, 무릎관절에 굽힘·폄, 발목관절의 발등 굽힘·발바닥 굽힘을 측정하였다. 수직 점프와 다리 근력의 상관관계를 분석하기 위해 pearson's correlation analysis를 사용하였다. 수직 점프 및 다리 근력과의 관계에서 우세측, 비우세측 모두 발바닥 굽힘 근력을 제외한 모든 다리 근력과 수직 점프 간의 양의 상관관계를 보였다. 향후 연구에서는 타격능력과 수직 점프 및 다리 근력의 관계에 대한 후속연구가 필요하다.

• 한국운동역학회지
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• 제24권1호
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• pp.85-93
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• 2014

The purpose of this study was to investigate a relationship among Taekwondo, soccer and gymnastic athletes their balance ability and lower extremity muscle strength, muscle endurance and also whether these variables show differences by sports type. For this purpose, 10 Taekwondo athletes, 10 soccer athletes and 10 gymnastic athletes that is a high school in I area were selected and their balance ability, isokinetic muscle strength and muscle endurance were measured by using force platform (AMTI) and isokinetic measurement (HUMAC NORM). Then the following results were obtained by conducting pearson product-moment correlation analysis and one-way ANOVA. In case of both right and left foot one-leg standing with open-eyes, there was a relation between both knee extension maximal muscle strength of Taekwondo, soccer, gymnastic athletes and balance ability, and in case of right foot one-leg standing with open-eyes, there was a relation between that is right plantar flexion and dorsi flexion maximum muscle strength and muscle endurance of Taekwondo, soccer, gymnastic athletes and their balance ability. Furthermore, in case of left dorsi flexion maximum muscle strength, there were significant differences in order of Taekwondo, gymnastics and soccer, and for isokinetic plantar flexion maximum muscle endurance, both right and left showed significant differences in order of Taekwondo, gymnastic and soccer.

• 대한물리의학회지
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• 제10권3호
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• pp.87-93
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• 2015

PURPOSE: The purpose of this study was to investigate the effects of the 8.5seconds cut-off of the 8-foot up-and-go test as a predictor of falling and a good discriminator of fallers and non-fallers in women in their 60s to 80s. METHODS: The final subjects of this study were 98 elderly women from six senior centers of B metropolitan city. The 8-foot up-and-go test evaluated agility and dynamic balance. The chair-stand test measured the muscle strength for of the lower body. Ankle dorsiflexion and plantar flexion were measured to assess the ankle mobility of the subjects in this study. RESULTS: The below 8.5seconds group showed significantly low values in age and high values in chair-stand (times/30 s), plantar flexion ($^{\circ}$), and K-MMSE (score) compared to the over 8.5seconds group. This group was significantly faster compared to the over 8.5seconds group. In the below 8.5seconds group, only plantar flexion ($^{\circ}$) of all the items showed significantly higher values among those in their 60s compared to those in their 70s and 80s. CONCLUSION: The 8.5seconds cut-off on the 8-foot up-and-go test as a good discriminator and predictor of falling showed differences among fall risk factors (age, lower extremity strength, cognition, and ankle mobility) in women in their 60s to 80s without having regular exercise and a fall experience over the past ones year.