A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
University of Cincinnati / OhioLINK
2015
|
| Subjects: | |
| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447690685 |
| id |
ndltd-OhioLink-oai-etd.ohiolink.edu-ucin1447690685 |
|---|---|
| record_format |
oai_dc |
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-ucin14476906852021-08-03T06:33:43Z A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness Mummidivarapu, Satya Sri Aerospace Materials Squat Exercise Countermeasures Reduced Gravity Body weight replacement Load Biomechanics Bone and Muscle forces One of the challenges for long duration space voyages is to maintain atronaut's health. Studies on Astronauts in the Mir space station have confirmed a loss of 1-2% in bone mass density for each month. They are prone to lose as much as 20% of their bone strength in the lower body which includes pelvis, hip bone, legs and feet over a six month duration of space flight. Muscle loss of 10 to 20 % was observed during short missions and up to 50% loss in long duration missions when appropriate countermeasures were not prescribed. The primary objective of this research is to develop a systematic means of determining the appropriate body weight replacement load under various conditions in weightlessness so that similar bone and muscle forces would be experienced as in 1g squat.The study involved obtaining motion capture data from four female subjects while performing a body weight squat at the Human Systems and Simulations Laboratory (HSSL) at the University of Cincinnati. In the 1g environment, the normalized peak muscle forces are 14.3 N/kg in the gluteal muscle group, 5.6 N/kg in the hamstrings, 35.9 N/kg in the quadriceps and 32.4 N/kg in the calf muscle group. The normalized peak joint reaction loads are 35.6 N/kg at the hip joint, 46.4 N/kg at the knee joint, 95.5 N/kg at the ankle joint and 16.7 N/kg at the lumbar joint.It was performed by varying the external loads at the shoulders from 50% BW to 150% BW in 10% increments. A weighted least squares calculation was then performed to determine the best external load for comparable joint moments, muscle forces, and joint reaction loads. The values of the best body weight replacement load were found to be 71%, 84% and 76% for joint moments, muscle forces, and joint reaction loads, respectively. 2015 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447690685 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447690685 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Aerospace Materials Squat Exercise Countermeasures Reduced Gravity Body weight replacement Load Biomechanics Bone and Muscle forces |
| spellingShingle |
Aerospace Materials Squat Exercise Countermeasures Reduced Gravity Body weight replacement Load Biomechanics Bone and Muscle forces Mummidivarapu, Satya Sri A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness |
| author |
Mummidivarapu, Satya Sri |
| author_facet |
Mummidivarapu, Satya Sri |
| author_sort |
Mummidivarapu, Satya Sri |
| title |
A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness |
| title_short |
A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness |
| title_full |
A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness |
| title_fullStr |
A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness |
| title_full_unstemmed |
A Method for Determining Body Weight Replacement Load during Squat Exercise in Weightlessness |
| title_sort |
method for determining body weight replacement load during squat exercise in weightlessness |
| publisher |
University of Cincinnati / OhioLINK |
| publishDate |
2015 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447690685 |
| work_keys_str_mv |
AT mummidivarapusatyasri amethodfordeterminingbodyweightreplacementloadduringsquatexerciseinweightlessness AT mummidivarapusatyasri methodfordeterminingbodyweightreplacementloadduringsquatexerciseinweightlessness |
| _version_ |
1719439182699429888 |