Oxygen uptake, muscle activity and ground reaction force during water aerobic exercises.

Autor:	Alberton CL; School of Physical Education, Federal University of Pelotas, Pelotas, Brazil., Pinto SS; School of Physical Education, Federal University of Pelotas, Pelotas, Brazil., Cadore EL; School of Physical -Education, Federal University of Rio Grande do Sul, Porto Alegre, Brazil., Tartaruga MP; School of Physical Education, Midwest State University of Parana, Guarapuava, Brazil., Kanitz AC; School of Physical -Education, Federal University of Rio Grande do Sul, Porto Alegre, Brazil., Antunes AH; School of Physical -Education, Federal University of Rio Grande do Sul, Porto Alegre, Brazil., Finatto P; School of Physical -Education, Federal University of Rio Grande do Sul, Porto Alegre, Brazil., Kruel LF; School of Physical -Education, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
Jazyk:	angličtina
Zdroj:	International journal of sports medicine [Int J Sports Med] 2014 Dec; Vol. 35 (14), pp. 1161-9. Date of Electronic Publication: 2014 Aug 21.
DOI:	10.1055/s-0034-1383597
Abstrakt:	This study aimed to compare the oxygen uptake (VO2), the muscle activity of lower limbs, and the vertical ground reaction force (V-GRF) of women performing water aerobic exercises at different intensities. 12 young women performed the experimental protocol, which consisted of 3 water exercises (stationary running [SR], frontal kick [FK] and cross country skiing [CCS]) at 3 intensities (first and second ventilatory thresholds and maximum effort). A two-way repeated measures ANOVA was used. Regarding VO2, different responses between intensities (p<0.001) were found, and values between exercises were similar. For electromyographic activity (EMG), differences between intensities for all muscles (p<0.001) were found. Greater EMG signals were observed in the FK compared to SR for rectus femoris, semitendinosus, vastus lateralis and biceps femoris muscles (p<0.05). Regarding V-GRF, there was an increase in the V-GRF at greater intensities compared to the first ventilatory threshold (p=0.001). In addition, lower values were found during CCS compared to the SR and FK exercises (p<0.001). Thus, greater cardiorespiratory and neuromuscular responses were observed with increasing intensity. Exercises such as CCS could be used to attenuate the V-GRF; if the purpose is to reduce the muscular activity of lower limbs at a specific intensity, SR could be recommended. (© Georg Thieme Verlag KG Stuttgart · New York.)
Databáze:	MEDLINE
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