@article{ART002410460},
author={Jun-Young Lee and Tackhoon Kim},
title={Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years},
journal={Journal of the Korean Society of Physical Medicine},
issn={1975-311X},
year={2018},
volume={13},
number={4},
pages={139-148},
doi={10.13066/kspm.2018.13.4.139}
TY - JOUR
AU - Jun-Young Lee
AU - Tackhoon Kim
TI - Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years
JO - Journal of the Korean Society of Physical Medicine
PY - 2018
VL - 13
IS - 4
PB - The Korean Society of Physical Medicine
SP - 139
EP - 148
SN - 1975-311X
AB - PURPOSE: This study compared the effects of indoor and outdoor environmental changes on the activity of the major lower limb muscles and walking factors in people 40-50 years and those aged older than 70 years.
METHODS: Ten middle-aged people in their forties (age:44.2±2.7, BMI:21.8±1.8) and 10 elderly aged more than 70 years (age:76.4±5.9, BMI:22.2±1.9) with a normal walking ability were included. The participants walked 100 m both indoors and outdoors at their own speed. Using a 3D motion analyzer and EMG, the walking speed, angle of the ankle and activity changes of the lower limb muscles were compared.
RESULTS: Significant differences in walking speed and peak-plantar flexion angle were observed between the two groups (p<.05). The muscular activity of the gastrocnemius muscle (GCM) was significantly different outdoors in the swing phase between the two groups (p<.05). In the people aged in their forties, the muscular activity of the rectus femoris (RF) was significantly higher outdoors than indoors (p<.05).
In the elderly, however, the muscular activity of the RF was lower outdoors than indoors (p<.05). When compared to those in there forties, the muscular activity of the outdoor RF significantly decreased in the elderly group (P<.05). The muscular activity of the biceps femoris (BF) in the elderly decreased significantly outdoors compared to indoors (p<.05).
CONCLUSION: For the elderly, increasing the exposure to the new environments or focusing on the performance of repeated movements for gradual speed control and precise movements is required to maintain normal gaits and movements that are less affected by environmental changes.
KW - Electromyography;Enviroment;Gait;Walking speed
DO - 10.13066/kspm.2018.13.4.139
ER -
Jun-Young Lee and Tackhoon Kim. (2018). Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years. Journal of the Korean Society of Physical Medicine, 13(4), 139-148.
Jun-Young Lee and Tackhoon Kim. 2018, "Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years", Journal of the Korean Society of Physical Medicine, vol.13, no.4 pp.139-148. Available from: doi:10.13066/kspm.2018.13.4.139
Jun-Young Lee, Tackhoon Kim "Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years" Journal of the Korean Society of Physical Medicine 13.4 pp.139-148 (2018) : 139.
Jun-Young Lee, Tackhoon Kim. Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years. 2018; 13(4), 139-148. Available from: doi:10.13066/kspm.2018.13.4.139
Jun-Young Lee and Tackhoon Kim. "Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years" Journal of the Korean Society of Physical Medicine 13, no.4 (2018) : 139-148.doi: 10.13066/kspm.2018.13.4.139
Jun-Young Lee; Tackhoon Kim. Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years. Journal of the Korean Society of Physical Medicine, 13(4), 139-148. doi: 10.13066/kspm.2018.13.4.139
Jun-Young Lee; Tackhoon Kim. Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years. Journal of the Korean Society of Physical Medicine. 2018; 13(4) 139-148. doi: 10.13066/kspm.2018.13.4.139
Jun-Young Lee, Tackhoon Kim. Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years. 2018; 13(4), 139-148. Available from: doi:10.13066/kspm.2018.13.4.139
Jun-Young Lee and Tackhoon Kim. "Effects of Changes in the Indoor and Outdoor Environmental on the Walking Speed and Lower Extremity Muscle Activities in People Aged Forty and Older than Seventy Years" Journal of the Korean Society of Physical Medicine 13, no.4 (2018) : 139-148.doi: 10.13066/kspm.2018.13.4.139