Peak oxygen uptake and maximal power output of Olympic wheelchair-dependent athletes

The aim of this study was to investigate whether the maximal power output (Pmax) during an incremental test was dependent on the curvature constant (W′) of the power–time relationship. Thirty healthy male subjects (maximal oxygen uptake = 3.58 ± 0.40 L·min−1) performed a ramp incremental cycling test to determine the maximal oxygen uptake and Pmax, and 4 constant work rate tests to exhaustion to estimate 2 parameters from the modeling of the power–time relationship (i.e., critical power (CP) and W′). Afterwards, the participants were ranked according to their magnitude of W′. The median third was excluded to form a high W′ group (HIGH, n = 10), and a low W′ group (LOW, n = 10). Maximal oxygen uptake (3.84 ± 0.50 vs. 3.49 ± 0.37 L·min−1) and CP (213 ± 22 vs. 200 ± 29 W) were not significantly different between HIGH and LOW, respectively. However, Pmax was significantly greater for the HIGH (337 ± 23 W) than for the LOW (299 ± 40 W). Thus, in physically active individuals with similar aerobic parameters, W′ influences the Pmax during incremental testing.

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Maximal oxygen uptake versus maximal power output in children

Journal of Sports Sciences ◽

10.1080/02640410802199789 ◽

2008 ◽

Vol 26 (13) ◽

pp. 1397-1402 ◽

Cited By ~ 19

Author(s):

Magnus Dencker ◽

Ola Thorsson ◽

Magnus K. Karlsson ◽

Christian Lindén ◽

Per Wollmer ◽

...

Keyword(s):

Oxygen Uptake ◽

Power Output ◽

Maximal Oxygen Uptake ◽

Maximal Power ◽

Maximal Power Output

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Power output and fatigue of human muscle in maximal cycling exercise

Journal of Applied Physiology ◽

10.1152/jappl.1983.55.1.218 ◽

1983 ◽

Vol 55 (1) ◽

pp. 218-224 ◽

Cited By ~ 76

Author(s):

N. McCartney ◽

G. J. Heigenhauser ◽

N. L. Jones

Keyword(s):

Power Output ◽

Fiber Type ◽

Average Power ◽

Lactate Concentration ◽

Peak Torque ◽

Muscle Volume ◽

Thigh Muscle ◽

Peak Power Output ◽

Maximal Power ◽

Maximal Power Output

We studied maximal torque-velocity relationships and fatigue during short-term maximal exercise on a constant velocity cycle ergometer in 13 healthy male subjects. Maximum torque showed an inverse linear relationship to crank velocity between 60 and 160 rpm, and a direct relationship to thigh muscle volume measured by computerized tomography. Peak torque per liter thigh muscle volume (PT, N X ml-1) was related to crank velocity (CV, rpm) in the following equation: PT = 61.7 - 0.234 CV (r = 0.99). Peak power output was a parabolic function of crank velocity in individual subjects, but maximal power output was achieved at varying crank velocities in different subjects. Fiber type distribution was measured in the two subjects showing the greatest differences and demonstrated that a high proportion of type II fibers may be one factor associated with a high crank velocity for maximal power output. The decline in average power during 30 s of maximal effort was least at 60 rpm (23.7 +/- 4.6% of initial maximal power) and greatest at 140 rpm (58.7 +/- 6.5%). At 60 rpm the decline in power over 30 s was inversely related to maximal oxygen uptake (ml X min-1 X kg-1) (r = 0.69). Total work performed and plasma lactate concentration 3 min after completion of 30-s maximum effort were similar for each crank velocity.

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Aerobic efficiency is associated with the improvement in maximal power output during acute hyperoxia

Physiological Reports ◽

10.14814/phy2.13119 ◽

2017 ◽

Vol 5 (2) ◽

pp. e13119 ◽

Cited By ~ 5

Author(s):

Tom A. Manselin ◽

Olof Södergård ◽

Filip J. Larsen ◽

Peter Lindholm

Keyword(s):

Power Output ◽

Maximal Power ◽

Maximal Power Output

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Effect of inspired O2 concentration on leg lactate release during incremental exercise

Journal of Applied Physiology ◽

10.1152/jappl.1996.81.1.246 ◽

1996 ◽

Vol 81 (1) ◽

pp. 246-251 ◽

Cited By ~ 24

Author(s):

D. R. Knight ◽

D. C. Poole ◽

M. C. Hogan ◽

D. E. Bebout ◽

P. D. Wagner

Keyword(s):

Blood Lactate ◽

Power Output ◽

Incremental Exercise ◽

Venous Blood Flow ◽

Maximal Power ◽

Maximal Power Output ◽

Lactate Accumulation ◽

Lactate Release ◽

O2 Concentration ◽

Blood Lactate Accumulation

The normal rate of blood lactate accumulation during exercise is increased by hypoxia and decreased by hyperoxia. It is not known whether these changes are primarily determined by the lactate release in locomotory muscles or other tissues. Eleven men performed cycle exercise at 20, 35, 50, 92, and 100% of maximal power output while breathing 12, 21, and 100% O2. Leg lactate release was calculated at each stage of exercise as the product of femoral venous blood flow (thermodilution method) and femoral arteriovenous difference in blood lactate concentrations. Regression analysis showed that leg lactate release accounted for 90% of the variability in mean arterial lactate concentration at 20-92% maximal power output. This relationship was described by a regression line with a slope of 0.28 +/- 0.02 min/l and a y-intercept of 1.06 +/- 0.38 mmol/l (r2 = 0.90). There was no effect of inspired O2 concentration on this relationship (P > 0.05). We conclude that during continuous incremental exercise to fatigue the effect of inspired O2 concentration on blood lactate accumulation is principally determined by the rate of net lactate release in blood vessels of the locomotory muscles.

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Physiological Factors That Allow for the Attainment of “Maximal Power Output” and “Entire Match Wrestling Power Output”

Physiology and Nutrition for Amateur Wrestling ◽

10.1201/9780429354779-11 ◽

2020 ◽

pp. 49-51

Author(s):

Charles Paul Lambert

Keyword(s):

Power Output ◽

Maximal Power ◽

Maximal Power Output ◽

Physiological Factors

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Maximal power output of a stochastic thermodynamic engine

Automatica ◽

10.1016/j.automatica.2020.109366 ◽

2021 ◽

Vol 123 ◽

pp. 109366

Author(s):

Rui Fu ◽

Amirhossein Taghvaei ◽

Yongxin Chen ◽

Tryphon T. Georgiou

Keyword(s):

Power Output ◽

Maximal Power ◽

Maximal Power Output

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Wheelchair exercise performance of the young, middle-aged, and elderly

Journal of Applied Physiology ◽

10.1152/jappl.1981.50.4.824 ◽

1981 ◽

Vol 50 (4) ◽

pp. 824-828 ◽

Cited By ~ 25

Author(s):

M. N. Sawka ◽

R. M. Glaser ◽

L. L. Laubach ◽

O. Al-Samkari ◽

A. G. Suryaprasad

Keyword(s):

Age Groups ◽

Peak Oxygen Uptake ◽

Upper Body ◽

Maximal Heart Rate ◽

Maximal Power ◽

Middle Aged ◽

Maximal Power Output ◽

Similar Time ◽

Upper Body Exercise ◽

Peak Vo2

The purpose of this study was to quantitate the maximal power output (POmax), peak oxygen uptake (peak VO2), and maximal heart rate (HRmax) for wheelchair ergometer (WERG) exercise performed by three groups of disabled males: young adult (20-30 yr), middle-aged (50-60 yr), and elderly (80-90 yr). These subjects, who were confined to wheelchairs for similar time periods (mean = 11.7 yr), participated in progressive-intensity discontinuous test protocols on a WERG. Lower (P less than 0.01) mean POmax, peak VO2, and HRmax values were found with advancing age groups. In relationship to age, decreases in POmax and HRmax values were best described by parabolic models, whereas decreases in peak VO2 values were best described by a linear model. In comparison with young adults (83 W, 27 ml . kg-1 . min-1), surprisingly low POmax and peak VO2 values were found for the middle-aged (16 W, 10 ml . kg-1 . min-1) and elderly (7 W, 8 ml . kg-1 . min-1). When our peak VO2 data were combined with other data in the literature for upper body exercise by male disabled individuals, a decrease of 0.19 1 . min-1 or 2.9 ml . kg-1 . min-1 per decade of life was found.

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