Variability of time to exhaustion and physiological responses to treadmill running

Yamaji, Kunihiko; Hashimoto, Kazutaka; Hashizume, Kazuo

doi:10.5432/jjpehss.kj00003397571

Cited by 2 publications

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“…The present study indicated that there were no significant differences in HR and V ・ O2, and among the three conditions and ranges of CV, the values were 3.0 -4.8% and 4.2 -5.1%. It was reported that between-day CV for HR and V ・ O2 during treadmill running was 1.0 -10.7% and 1.9 -11.6% 9) . Other studies showed that the withinsubject variation for maximum oxygen uptake during treadmill running was 3.8 -8.3% 10) .…”

Section: Methodsmentioning

confidence: 99%

Suitability of modified tandem-bicycle ergometer for the improvement of physical fitness and athletic performance

Onodera

Yoshioka

Yamaguchi

et al. 2015

JPFSM

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In the present study, a tandem-bicycle ergometer was developed, because it is believed that such an ergometer can be used to eliminate differences in signaling between singleand tandem-exercise in cardiorespiratory responses, and is able to quantify interdependence in one load. It is necessary to verify whether cardiorespiratory responses to submaximal exercise are the same between single and tandem-bicycle ergometers. Accordingly, we compared cardiorespiratory variables during exercise in three conditions: 1) with a general bicycle single saddle using a general bicycle ergometer, 2) with a tandem bicycle front saddle using a tandem ergometer, and 3) with a tandem bicycle rear saddle using a tandem ergometer. Eleven healthy males participated in this study. The subjects exercised for 15 min at three intensities (1.5, 2.0 and 2.5 kp) in each condition. The pedaling rate was constantly kept at 60 rpm. Heart rate (HR), oxygen uptake (V ・ O 2), and the rating of perceived exertion (RPE) were measured during the last minute of each intensity. There were no significant differences in the variables HR, V ・ O 2 , and RPE at each load among the three conditions. The ranges of coefficient of variation (CV) values were 3.0-4.8%: HR and 4.2-5.1%: V ・ O 2. It was reported that between-day CV for HR and V ・ O 2 during treadmill running was 1.0-10.7% and 1.9-11.6%. Given these CV values of present and previous studies, it can be seen that physiological response is stable during developed tandem-bicycle ergometer exercise. These results suggest that cardiorespiratory responses to exercise are at comparable levels between a normal bicycle ergometer and the newly developed tandem-bicycle ergometer.

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Section: Methodsmentioning

confidence: 99%

Suitability of modified tandem-bicycle ergometer for the improvement of physical fitness and athletic performance

Onodera

Yoshioka

Yamaguchi

et al. 2015

JPFSM

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“…We have further confidence in our V · o 2 max values because the nine subjects participated in other studies (Yamaji et al, 2000a;2000b), where the treadmill speed was increased by 10-m · min Ϫ1 , starting at 180-m · min Ϫ1 in males and 150-m · min Ϫ1 in females. There were no significant differences in the average V · o 2 max between the two studies (64.5Ϯ0.9 vs. 63.1Ϯ6.1 ml · kg Ϫ1 · min Ϫ1 ).…”

mentioning

confidence: 99%

Running Speed at Predicted Maximal Heart Rate as an Assessment of Maximal Aerobic Capacity in Trained Teenaged Runners

Yamaji

Igarashi

Iguchi

et al. 2008

Int. J. Sport Health Sci.

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The performance of endurance athletes depends upon the fractional utilization of V · o 2 max (%V · o 2 max) (di Prampero et al., 1986;Morgan et al., 1989), and, thus, the individual's V · o 2 max and running economy (RE, V · o 2 at a specified, sub-maximal running speed) (Conley and Krahenbuhl, 1986;Lacour et al., 1991;Yamaji, 1997). Daniels (1985) and di Prampero et al. (1986) found that, in adults, the velocity at the maximal oxygen intake (vV · o 2 max), depending on V · o 2 max and RE, was a useful marker of running-related endurance. V · o 2 max and RE both bear a close relationship to the average running velocity over events ranging from a 1500-m race to a full-length marathon (Bethon et al., 1997;Hill and Rowell, 1996;Lacour et al., 1991). Though the directly measured V · o 2 max and vV · o 2 max are the most precise physiologic markers of aerobic capacity in runners, such measurements are not always feasible or convenient. Determinations of V · o 2 max and vV · o 2 max require bulky and expensive equipment, and maximal running on a level treadmill Yamaji, K., et al. 154 International Journal of Sport and Health Science Vol.

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Variability of time to exhaustion and physiological responses to treadmill running

Cited by 2 publications

References 0 publications

Suitability of modified tandem-bicycle ergometer for the improvement of physical fitness and athletic performance

Suitability of modified tandem-bicycle ergometer for the improvement of physical fitness and athletic performance

Running Speed at Predicted Maximal Heart Rate as an Assessment of Maximal Aerobic Capacity in Trained Teenaged Runners

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