Characteristics of Muscle Activity of Lower Leg on Maximum Lateral Shift of Center of Foot Pressure in the Elderly

Isometric bodyweight squats are fundamental exercises in athletic training and rehabilitation. Previously, we measured muscle activity in a normal squat posture (NSP) and a squat posture with the center of foot pressure (COP) intentionally shifted forward as far as possible (forward-shifted posture: FSP), and the muscle activity patterns varied significantly according to the COP location. This study focused on stepwise loading as a training strategy. Ten healthy male participants performed isometric bodyweight squats in a previous study, adopting the NSP and FSP, with three knee flexion angles (30°, 60°, and 90°). The muscle activities of the vastus medialis (VM), semitendinosus, tibialis anterior (TA), and gastrocnemius muscle lateral head were measured using surface electromyogram. This study further explored the relationship between COP shifting and knee flexion angles on electromyogram changes using three-dimensional diagrams. In one-way repeated measures analysis of variance by ranks, knee flexion angles affected the muscle activities of the VM and TA in the NSP and muscle activities of the VM in the FSP. Combining these findings, stepwise loading tasks were created to train individual target muscles. The ten male participants examined all the tasks, and the feasibility was confirmed accordingly.

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Effect of bag holding on the center of foot pressure and the lower leg muscle activities

European Journal of Sport Science ◽

10.1080/17461390500175261 ◽

2005 ◽

Vol 5 (2) ◽

pp. 89-96 ◽

Cited By ~ 6

Author(s):

Shinichi Demura ◽

Masanobu Uchiyama ◽

Takayoshi Yamada ◽

Yoshinori Nagasawa

Keyword(s):

Lower Leg ◽

Foot Pressure ◽

Center Of Foot Pressure ◽

Leg Muscle

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SELECTION OF USEFUL PARAMETERS TO EVALUATE CENTER-OF-FOOT PRESSURE MOVEMENT

Perceptual and Motor Skills ◽

10.2466/pms.103.7.959-973 ◽

2006 ◽

Vol 103 (7) ◽

pp. 959 ◽

Cited By ~ 1

Author(s):

SHINICHI DEMURA

Keyword(s):

Foot Pressure ◽

Center Of Foot Pressure ◽

Selection Of

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Creating a Safer Patient Room Environment: The Contribution of Patient Bed Height

Proceedings of the International Symposium on Human Factors and Ergonomics in Health Care ◽

10.1177/2327857921101163 ◽

2021 ◽

Vol 10 (1) ◽

pp. 180-184

Author(s):

Dorothy Taylor ◽

Janice Morse ◽

Andrew Merryweather

Keyword(s):

Elderly Patient ◽

Fall Risk ◽

The Elderly ◽

Lower Leg ◽

Patient Specific ◽

Leg Length ◽

Patient Room ◽

Patient Falls ◽

Sit To Stand ◽

Bed Height

Elderly patient falls are expensive and may cause serious harm. Studies have identified the sit-to-stand-and-walk (STSW) task as the task where the greatest number of elderly patient falls occur. There is a great need to identify the particular movement and environmental conditions that lead to these elderly patient falls. This study begins to address this gap by evaluating the elderly patient during self-selected hospital bed egress. Using an observed fall risk episode (FRE) as a fall proxy, statistically significant parameters were identified which include bed height, pausing prior to initiating gait, level of fall risk, and Stand phase. Low bed height was identified as the least safe bed height. Patient-specific bed height (PSBH) using the patient’s lower leg length (LLL) is recommended. In addition, suggested guidelines are presented for clinical application in setting PSBH without measuring the patient’s LLL.

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Quantitative analysis of static equilibrium in women after mastectomy

International Journal on Disability and Human Development ◽

10.1515/ijdhd-2013-0041 ◽

2014 ◽

Vol 14 (1) ◽

pp. 81-87

Author(s):

Maciej Rachwał ◽

Justyna Drzał-Grabiec ◽

Katarzyna Walicka-Cupryś ◽

Aleksandra Truszczyńska

Keyword(s):

Mean Amplitude ◽

Control Group ◽

Foot Pressure ◽

Locomotor System ◽

Center Of Foot Pressure ◽

The Mean ◽

Almost All ◽

Posture Stability ◽

Mastectomy Group ◽

Better Than

Abstract Background: The post-mastectomy changes to the locomotor system are related to the scar and adhesion or to the lymphatic edema after amputation which, in turn, lead to local and global distraction of the work of the muscles. These changes lead to body statics disturbance that changes the projection of the center of gravity and worsens motor response due to changing of the muscle sensitivity. Objective: The aim of the study was to evaluate the static balance of women after undergoing mastectomy. Methods: The study included 150 women, including 75 who underwent mastectomy (mean age: 60±7.6) years, mean body mass index (BMI): 26 (±3.6) kg/m2) and 75 who were placed in the control group with matched age and BMI. The study was conducted using a tensometric platform. Results: Statistically significant differences were found for almost all parameters between the post-mastectomy group and group of healthy women, regarding center of foot pressure (COP) path length in the Y and X axes and the mean amplitude of COP. Conclusions: First, the findings revealed that balance in post-mastectomy women is significantly better than in the control group. Second, physiotherapeutic treatment of post-mastectomy women may have improved their posture stability compared with their peers.

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