Analysis Of Influencing Factors On Motor Control Ability Of Squatting Exercises In Older Adults

ObjectivePopulation aging has become a global social problem. Falls is a major threat to the health of older adults. The present research intends to study the mechanics and physiological characteristics of older adults lower limb when they do the squatting exercises, and explore the influencing factors on motor control ability of squatting exercises in older adults. Therefore, it will be helpful to prevent falls in older adults and improve their health and quality of life.MethodsWe have selected177female in different age groups in the Beijing community. Participants fine Physical conditions without obvious wound or disease is ensured in the process of addressing a questionnaire. By using MES-01S20muscle evaluation system, the author tests the Participants lower extremity motor function. We test the lower limb neuromuscular response by using a homemade foot inversion device and Mega Win6000surface EMG device. We record the participants’ movements while they do the squatting exercises by using one Kistler three dimensional force plate, camera system and surface EMG device. We carry out a three dimensional fixed-point and multi-Point analysis of the recording by using Vision system, together with an analysis of the dynamical parameter by using Kistler software in order to get the indices of kinesiology and dynamics. We also carry out an analysis of the EMG by using Mega Win software. We make a variance analysis concerning single factor by putting these indices into different categories according to different age groups.Results1. Compared with the young people, the elderly s lower limb maximum force and maximum muscle strength on both sides of the lower limbs are significantly reduced. The recession of right side lower extremity strength is more significant than the left lower limb. The homeostasis coefficient of lower extremity motor function decreases with increasing age. 2. Compared with the young people, the total time to complete squatting exercises of the elderly is increased, and lengthen of the total time period is from the increased time of centrifugation period. The order of lower extremity joint moments and the average net contribution during the squat are hip> knee> ankle. There is a inflection point on average net hip joint moments in the50-year-old age group, while the average knee net joint moments of70-year-old age group is the minimum.3. The knee and ankle flexion angle of the elderly is significantly less than the young people during the squat movement. The elderly s COP has remained in the vicinity of the heel, and discharge magnitude of lower limb muscles is smaller.Conclusion1. The decline of lower limb motor function result in the development of elderly bilateral lower extremity muscle strength not balanced, also lead to that lateral balance decreased, so it cause control ability of squat movement decreased. It is tips for that the elderly should focus on the exercise of strengthening in the lateral balance.2. The reflection of older adults to squat movement control is the performance of hip recession first, followed by knee recession.50-year-old is a turning point in the recession of hip strength, and70-year-old is a turning point in the recession of knee strength. We can use this as key sensitive age for elderly to enhance the motor control and prevent the occurrence of falls in the future.3. There is a great relationship on recession of squat movement control and strategy of action in the completion:the elderly squat by a approach of "recoil" type and can not fully mobilize the muscles involved, these are all risk factors leading to the elderly easy to fall. We should be concerned about the intervention of action strategy while implementing the work of preventing falls in older people.