TY - JOUR
T1 - Age-related differences in muscle activity, stride frequency and heart rate response during walking in water
AU - Masumoto, Kenji
AU - Shono, Tomoki
AU - Takasugi, Shin ichiro
AU - Hotta, Noboru
AU - Fujishima, Kazutaka
AU - Iwamoto, Yukihide
N1 - Funding Information:
Kenji Masumoto , Ph.D. received his B.S. in Exercise Physiology at the National Institute of Fitness and Sports in Kanoya in 1999, his M.S. in Health Science at Kyushu University in 2001, and his Ph.D. in Medical Sciences at Kyushu University in 2005. His prior research addressed the biomechanical and physiological responses during exercise in water. Currently he is conducting research as a Japan Society for the Promotion of Science Research Fellowship for Young Scientists. At present his scientific activity is focused on neuromuscular and metabolic physiology and biomechanics of human movement.
PY - 2007/10
Y1 - 2007/10
N2 - This study aimed to examine whether walking in water produces age-related differences in muscle activity, stride frequency (SF), and heart rate (HR) response. Surface electromyography (EMG) was used to evaluate muscle activities in six older and six young subjects while they walked in water immersed to the level of the xiphoid process. The trials in water utilized the Flowmill which consists of a treadmill at the base of a water flume. The measurement of maximal voluntary contraction (MVC) of each muscle was made prior to the gait analysis. The %MVCs, which refer to the surface EMG measures, from the gastrocnemius of the older subjects were significantly lower than those of the young subjects, in every experimental condition (P < 0.05). In contrast, the %MVCs from the rectus femoris (P < 0.05) and the biceps femoris (P < 0.001) of older subjects were significantly greater than those of young subjects in every experimental condition. Moreover, the SFs of older subjects were also significantly greater than those of young subjects (P < 0.05), while the HR responses of older and young subjects were similar. In conclusion, the older subjects had increased hip musculature activity and decreased ankle plantar flexor activity while walking in water, compared with the young subjects.
AB - This study aimed to examine whether walking in water produces age-related differences in muscle activity, stride frequency (SF), and heart rate (HR) response. Surface electromyography (EMG) was used to evaluate muscle activities in six older and six young subjects while they walked in water immersed to the level of the xiphoid process. The trials in water utilized the Flowmill which consists of a treadmill at the base of a water flume. The measurement of maximal voluntary contraction (MVC) of each muscle was made prior to the gait analysis. The %MVCs, which refer to the surface EMG measures, from the gastrocnemius of the older subjects were significantly lower than those of the young subjects, in every experimental condition (P < 0.05). In contrast, the %MVCs from the rectus femoris (P < 0.05) and the biceps femoris (P < 0.001) of older subjects were significantly greater than those of young subjects in every experimental condition. Moreover, the SFs of older subjects were also significantly greater than those of young subjects (P < 0.05), while the HR responses of older and young subjects were similar. In conclusion, the older subjects had increased hip musculature activity and decreased ankle plantar flexor activity while walking in water, compared with the young subjects.
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U2 - 10.1016/j.jelekin.2006.06.006
DO - 10.1016/j.jelekin.2006.06.006
M3 - Article
C2 - 16904909
AN - SCOPUS:34547565422
VL - 17
SP - 596
EP - 604
JO - Journal of Electromyography and Kinesiology
JF - Journal of Electromyography and Kinesiology
SN - 1050-6411
IS - 5
ER -