Ankle Joint

Publication Title: 
British Journal of Sports Medicine

OBJECTIVES: To assess if tai chi, a traditional Chinese form of exercise, could improve proprioception in old people and if the effects of tai chi on proprioception are more evident than other exercise forms in the elderly. METHODS: By detecting the threshold of passive movement, ankle and knee joint kinaesthesis was measured in 21 elderly long term tai chi practitioners (TC group), 20 elderly long term swimmers/runners (S/R group), and 27 elderly sedentary controls (control group). RESULTS: Ankle joint kinaesthesis differed significantly among the three groups (p = 0.001).

Author(s): 
Xu, D.
Hong, Y.
Li, J.
Chan, K.
Publication Title: 
British Journal of Sports Medicine

OBJECTIVES: To investigate the influence of regular Tai Chi (TC) practice and jogging on muscle strength and endurance in the lower extremities of older people. METHODS: Twenty one long term older TC practitioners were compared with 18 regular older joggers and 22 sedentary counterparts. Maximum concentric strength of knee flexors and extensors was tested at angular velocities of 30 degrees/s and 120 degrees/s. Ankle dorsiflexors and plantar flexors were tested at 30 degrees/s and the dynamic endurance of the knee flexors and extensors was assessed at a speed of 180 degrees/s.

Author(s): 
Xu, D. Q.
Li, J. X.
Hong, Y.
Publication Title: 
Age and Ageing

BACKGROUND: The beneficial role of exercise in improving bone mineral density, muscle strength and balance, has been documented predominantly in younger populations. These findings may not apply to elderly populations with limited ability to perform exercises of high intensity. OBJECTIVE: To examine the effects of Tai Chi (TC) and resistance exercise (RTE) on bone mineral density (BMD), muscle strength, balance and flexibility in community living elderly people. DESIGN: Randomised controlled trial, using blocked randomization with stratification by sex.

Author(s): 
Woo, Jean
Hong, Athena
Lau, Edith
Lynn, Henry
Publication Title: 
The American Journal of Chinese Medicine

Balance ability decreases with age, which results in an increased risk of falls for people over age 65. Tai Chi exercise appears to offer potential benefits in the reduction of falls for the elderly. The purpose of the present study was to examine the effects of extended (6- and 12-month) Tai Chi exercise interventions on balance and selected motor functions for senior citizens. Forty-seven subjects were recruited from two local senior centers.

Author(s): 
Li, Yuhua
Devault, Cheri N.
Van Oteghen, Sharon
Publication Title: 
Clinical Biomechanics (Bristol, Avon)

BACKGROUND: Tai Chi Chuan is becoming a popular exercise among elders. This study measured the inter-segmental forces and moments at the lower extremity joints during a Tai Chi gait as compared to those during normal walking gait, in both apparently healthy young and elderly Tai Chi Chuan practitioners.

Author(s): 
Wu, Ge
Millon, Debra
Publication Title: 
Medicine and Sport Science

The purpose of the study was to investigate the influence of regular Tai Chi (TC) practice on muscle strength and endurance of the lower extremities in older people. Twenty-one long-term older TC practitioners were compared with 18 regular older joggers and 22 sedentary counterparts. Maximum concentric strength of knee flexors and extensors was tested at angular velocities of 30 degrees and 120 degrees /s. Ankle dorsiflexors and plantar flexors were tested at 30 degrees /s. Moreover the dynamic endurance of the knee flexors and extensors was assessed at the speed of 180 degrees /s.

Author(s): 
Xu, Dong Qing
Hong, Youlian
Li, Jing Xian
Publication Title: 
Medicine and Sport Science

BACKGROUND/AIMS: Tai Chi (TC) practice has been shown to improve leg muscle strength among elders. This study examined the leg muscle action patterns during a typical TC movement, and their relationship with knee extensor strength and knee flexion angle in single leg stance. METHODS: Surface electromyography of four leg muscles and knee movement were recorded from 5 female elderly TC practitioners while performing a TC movement and normal walking, respectively. The maximum knee extensor strength was also measured.

Author(s): 
Wu, Ge
Publication Title: 
Medicine and Sport Science

Eighty subjects aged over 60 participated in this study. Ankle and knee joint kinesthesia were measured in 21 long-term TC practitioners (TC group), 20 long-term swimming/running exercisers (S/R group), and 27 sedentary controls (control group). The results showed that ankle joint kinesthesia significantly differed among the three groups (p= 0.001). TC practitioners could detect a significantly smaller amount of motion than could the S/R exercisers (p = 0.022) and sedentary counterparts (p = 0.001).

Author(s): 
Li, Jing Xian
Xu, Dong Qing
Hong, Youlian
Publication Title: 
Medicine and Sport Science

BACKGROUND AND AIMS: The efficacy of Tai Chi (TC) to improve neuromuscular response characteristics underlying dynamic balance recovery in balance-impaired seniors at high risk for falling was examined during perturbed walking. METHODS: Twenty-two subjects were randomized into TC or control groups. Nineteen subjects (68-92 years, BERG 44 or less) completed the study. TC training incorporated repetitive exercises using TC's essential motor/biomechanical strategies, techniques, and postural components.

Author(s): 
Gatts, Strawberry
Publication Title: 
Age and Ageing
Author(s): 
Li, Jing Xian
Xu, Dong Qing
Hong, Youlian

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