The Effect of Plyometric Exercises on Muscle Strength in Premenopausal Women
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 26
- 主要终点
- Isokinetic testing trunk flexion-extension
研究概览
简要总结
It was aimed to examine the effects of plyometric exercises on muscle strength in this study. 26 premenopausal women assigned to one of the three groups: Control Group (n=8), Plyometric Exercise Group (n=10) and Isokinetic Exercise Group (n=8). Muscle strength assessments, depression and anxiety inventories were performed baseline and after 6 weeks.
详细描述
Depending on various factors, bone mass begins to decrease with aging and this may lead to the osteoporosis. Physical activity and regular exercise provides an increase in bone mineral density (BMD). It is mentioned that there are relationships between muscle strength and BMD and also muscle strength has positive effects on BMD. In the literature it is showed that postmenopausal women with weaker trunk muscle strength could have risk of osteoporosis.
Plyometric exercises are used to increase muscle strength. Physiological basis of plyometric exercise consist of stretch-shortening cycle and thus it is effective in increasing the force. At the same time, plyometric exercises have positive effects on BMD because of weight bearing exercises.
The aim of this study was to investigate the effects of plyometric exercises on hip and trunk muscle strength in premenopausal women.
Participants and Study Design: Twenty six sedentary premenopausal women aged 35-50 years participated this study. Participants were assigned into three groups: Plyometric Exercise Group (PG; n=10), Isokinetic Exercise Group (IG; n=8), Control Group (CG; n=8). Participants were informed about the procedures of the study and signed a written voluntary consent form in accordance with the Declaration of Helsinki. The study protocol was approved by the Ethical Committee of the Istanbul University Medical Faculty. Measurements and training sessions were performed in the Istanbul University Medical Faculty Sport Medicine Department's Laboratory.
Measurements: Muscle strength was determined by using a Cybex Norm isokinetic dynamometer (Cybex Humac Norm, USA). Range of motion was set from 10 degree extension to 40 degree flexion. Isokinetic concentric contraction strength was measured at angular velocity of 60 degree per second and 90 degree per second. Subjects performed 3 trials trunk flexion and extension contractions at minimal exertion and 4 test repetitions at maximal trunk flexion and extension.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Parallel
- 主要目的
- Other
- 盲法
- None
入排标准
- 年龄范围
- 35 Years 至 50 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Premenopausal women aged 35-50 years
排除标准
- •to have cardiovascular, musculoskeletal and neurologic disease
- •have been involved in exercise studies within the last 6 months
- •to being receive hormone replacement therapy
结局指标
主要结局
Isokinetic testing trunk flexion-extension
时间窗: Six weeks
changes trunk flexion and extension muscle strength from baseline at 6 weeks
Isokinetic testing hip abduction-adduction
时间窗: Six weeks
changes hip abduction and adduction muscle strength from baseline at 6 weeks
次要结局
- Beck Depression Inventory(Six weeks)
- State Trait Anxiety Inventory(Six weeks)
研究者
Kübra Alpay
Lecturer of Pysiotherapy and Rehabilitation Department
Bezmialem Vakif University