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Please use this identifier to cite or link to this item: http://ir.jwcpe.ac.jp/dspace/handle/123456789/578

Title: 水泳トレーニング法に関する研究 : テザード泳の有用性について
Other Titles: A study on the swimming training method : utility of tethered swim
Authors: 北川, 幸夫
柴田, 義晴
原, 英喜
Kitagawa, Yukio
Shibata, Yoshiharu
Hara, Hideki
キタガワ, ユキオ
シバタ, ヨシハル
ハラ, ヒデキ
Keywords: Stationary tethered swim
Swim training method
Physiological and perceptual indexes
Stroke mechanics
Issue Date: Mar-2006
Abstract: The purpose of this study was, through investigating the exercise characteristics of tethered swimming, a type of stationary swimming, to clarify the problems in utilizing tethered swimming as an endurance training method and to develop a new swimming training method. To do so, 5female competitive college swimmers were selected as subjects and had them do tethered swimming with fixed traction load, traction time, and repetition count. The heart rate (HR) and blood lactate accumulation as physiological indexes and rating of perceived exertion as a perceptual index were questioned. Also motions recorded by video tape recorder and electromyogram (EMG) for the stroke mechanics during tethered swimming were analyzed. As a result, the characteristics of tethered swimming and the efficacy of swimming as endurance training were obtained as follows: 1) The HR of Interval by tethered swimming (IST) at the traction load of 6kg in 10 sets of 50m swimming (35-sec. swims and 20-sec. breaks) showed significantly higher as p<0.05 compared with FS though it transited steady after the third time. The traction loads at 6kg was 50.4% of MTF (maximum tractional force). 2) IST loaded with 6kg traction load showed the load at which improvement in endurance can be anticipated in both physiological indexes (HR : 155.2±4.5bpm, BLA : 2.9±0.2mmol/L) as well as perceptual indexes (RPE : 13.2±0.9). 3) SR (stroke rate), SL (stroke length), LAH (Length of wrist and hip) and BL (Body leaning) during IST showed a slight difference but not significant compared with FS (Free Swimming) and almost steadily transition after the third time. IST did not seem to cause a disruption of stroke mechanics in the aspect of EMG. 4) As for 4ST, the traction loads at 4kg and 5kg showed physiological (HR : 153~174bpm,BLA : 3.0~7.1mmol/L)and perceptual (RPE : 12.6~17.6)exercise strengths,which could anticipate improvement in endurance at the same time 4ST, the traction loads at 5kg showed the tendency of gradual increase due the fact that the exercise strengths did not reach a steady position. 5) In the aspect of EMG, 4ST did not seem to cause the disruption of swimming in any of the trials though it suggested the presence of load that was approximate FS in between 4kg and 5kg of traction loads caused by fluctuation of SR, SL, LAH and BL. 6) In 4ST, there was a general trend among all subjects: observance of OBLA-Load at the traction load of 4.22kg. OBLA-Load accounted for 35.1% of MTF. The above findings suggested that,in tethered swimming,depending upon the setting of traction load,it was possible to establish the exercise strength that could expect endurance effects without breaking the stroke mechanics. Also suggested was the possibility that the appropriate traction load could be obtained from the maximum traction force. Thus, with tethered swimming, it is possible to set the appropriate load according to the swimming level, and therefore, tethered swimming can be utilized as a swimming training method for a wide range of competitive swimmers.
URI: http://ir.jwcpe.ac.jp/dspace/handle/123456789/578
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