TY - JOUR
T1 - Muscle activation, cardiorespiratory response, and rating of perceived exertion in older subjects while walking in water and on dry land
AU - Masumoto, Kenji
AU - Shono, Tomoki
AU - Hotta, Noboru
AU - Fujishima, Kazutaka
N1 - Funding Information:
This research was in part supported by Grants from the Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists. The English used in this manuscript was revised by Katherine Miller (Royal English Language Centre).
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.
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2008/8
Y1 - 2008/8
N2 - This study compared the muscle activities, cardiorespiratory responses, and ratings of perceived exertion (RPE) of nine older individuals while walking in water with those obtained while walking on dry land. Electromyography, stride frequency (SF), stride length (SL), oxygen uptake (over(V, ̇) O2), heart rate (HR), RPE (for breathing and legs, RPE-Br and RPE-Legs, respectively), and blood lactate concentration (BLa) were measured. There were no significant differences in the over(V, ̇) O2, HR, RPE-Br, RPE-Legs or BLa while walking in water and on dry land (moderate and fast speeds). Both in water and on dry land, the over(V, ̇) O2 -HR, over(V, ̇) O2-walking speed, and HR-walking speed relationships were significantly correlated. The SF and SL while walking in water were significantly lower than on dry land. The %MVCs while walking in water were all significantly lower than on dry land within each speed condition. Conversely, the over(V, ̇) O2, HR, RPE-Br and RPE-Legs, BLa, SL, and %MVC (the rectus femoris, vastus medialis, biceps femoris, and gastrocnemius) while walking in water were significantly higher than on dry land at the same speeds. In conclusion, walking in water elicits higher muscle activities, higher cardiorespiratory responses, and increased perceived exertion levels in older adults than walking on dry land at the same speed.
AB - This study compared the muscle activities, cardiorespiratory responses, and ratings of perceived exertion (RPE) of nine older individuals while walking in water with those obtained while walking on dry land. Electromyography, stride frequency (SF), stride length (SL), oxygen uptake (over(V, ̇) O2), heart rate (HR), RPE (for breathing and legs, RPE-Br and RPE-Legs, respectively), and blood lactate concentration (BLa) were measured. There were no significant differences in the over(V, ̇) O2, HR, RPE-Br, RPE-Legs or BLa while walking in water and on dry land (moderate and fast speeds). Both in water and on dry land, the over(V, ̇) O2 -HR, over(V, ̇) O2-walking speed, and HR-walking speed relationships were significantly correlated. The SF and SL while walking in water were significantly lower than on dry land. The %MVCs while walking in water were all significantly lower than on dry land within each speed condition. Conversely, the over(V, ̇) O2, HR, RPE-Br and RPE-Legs, BLa, SL, and %MVC (the rectus femoris, vastus medialis, biceps femoris, and gastrocnemius) while walking in water were significantly higher than on dry land at the same speeds. In conclusion, walking in water elicits higher muscle activities, higher cardiorespiratory responses, and increased perceived exertion levels in older adults than walking on dry land at the same speed.
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U2 - 10.1016/j.jelekin.2006.12.009
DO - 10.1016/j.jelekin.2006.12.009
M3 - Article
C2 - 17363276
AN - SCOPUS:45849094074
VL - 18
SP - 581
EP - 590
JO - Journal of Electromyography and Kinesiology
JF - Journal of Electromyography and Kinesiology
SN - 1050-6411
IS - 4
ER -