Maximal power output estimates the MLSS before and after aerobic training

The purpose of this study is to present an equation to predict the maximal lactate steady state (MLSS) through a VO2peak incremental protocol. Twenty-six physically active men were divided in two groups (G1 and G2). They performed one maximal incremental test to determine their VO2peak and maximal power output (Wpeak), and also several constant intensity tests to determine MLSS intensity (MLSSw) on a cycle ergometer. Group G2 underwent six weeks of aerobic training at MLSSw. A regression equation was created using G1 subjects Wpeak and MLSSw to estimate the MLSS intensity (MLSSweq) before and after training for G2 (MLSSweq = 0.866 x Wpeak-41.734). The mean values were not different (150±27W vs 148±27W, before training / 171±26W vs 177±24W, after training) and significant correlations were found between the measured and the estimated MLSSw before (r²=0.49) and after training (r²=0.62) in G2. The proposed equation was effective to estimate the MLSS intensity before and after aerobic training.

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Maximal Power Output Estimates the MLSS Intensity in Cycle Ergometer Before and After Aerobic Training

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000402152.02394.38 ◽

2011 ◽

Vol 43 (Suppl 1) ◽

pp. 774

Author(s):

Emerson Silami Garcia ◽

João Dias Carlos ◽

Carolina Franco Wilke ◽

Guilherme Passos Ramos ◽

Tatiana Ramos Fonseca ◽

...

Keyword(s):

Power Output ◽

Aerobic Training ◽

Cycle Ergometer ◽

Maximal Power ◽

Maximal Power Output ◽

Before And After

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The influence of bicycle lean on maximal power output during sprint cycling

10.31236/osf.io/xa7th ◽

2021 ◽

Author(s):

Ross D. Wilkinson ◽

Rodger Kram

Keyword(s):

Power Output ◽

Direct Evidence ◽

Cycle Ergometer ◽

Maximal Power ◽

Maximal Power Output ◽

Bicycle Dynamics ◽

Competitive Cyclists ◽

Sprint Cycling ◽

Ad Libitum

Competitive cyclists typically sprint out of the saddle and alternately lean their bikes from side-to-side, away from the downstroke pedal. Yet, there is no direct evidence as to whether leaning the bicycle, or conversely, attempting to minimize lean, affects maximal power output during sprint cycling. Here, we modified a cycling ergometer so that it can lean from side-to-side but can also be locked to prevent lean. This modified ergometer made it possible to compare maximal 1-s crank power during non-seated, sprint cycling under three different conditions: locked (no lean), ad libitum lean, and minimal lean. We found that leaning the ergometer ad libitum did not enhance maximal 1-s crank power compared to a locked condition. However, trying to minimize ergometer lean decreased maximal 1-s crank power by an average of 5% compared to leaning ad libitum. IMU-derived measures of ergometer lean provided evidence that, on average, during the ad-lib condition, subjects leaned the ergometer away from the downstroke pedal as in overground cycling. This suggests that our ergometer provides a suitable emulation of lateral bicycle dynamics. Overall, we find that leaning a cycle ergometer ad libitum does not enhance maximal power output, and conversely, trying to minimize lean impairs maximal power output.

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Maximal power output during incremental cycling test is dependent on the curvature constant of the power–time relationship

Applied Physiology Nutrition and Metabolism ◽

10.1139/apnm-2015-0090 ◽

2015 ◽

Vol 40 (9) ◽

pp. 895-898 ◽

Cited By ~ 5

Author(s):

Kristopher Mendes Souza ◽

Ricardo Dantas de Lucas ◽

Paulo Cesar do Nascimento Salvador ◽

Luiz Guilherme Antonacci Guglielmo ◽

Renato Aparecido Corrêa Caritá ◽

...

Keyword(s):

Oxygen Uptake ◽

Power Output ◽

Maximal Oxygen Uptake ◽

Maximal Power ◽

Maximal Power Output ◽

Physically Active ◽

Cycling Test ◽

Time Relationship ◽

Constant Work Rate ◽

Male Subjects

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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Effect of fatigue on maximal power output at different contraction velocities in humans

Journal of Applied Physiology ◽

10.1152/jappl.1991.71.6.2332 ◽

1991 ◽

Vol 71 (6) ◽

pp. 2332-2337 ◽

Cited By ~ 83

Author(s):

A. Beelen ◽

A. J. Sargeant

Keyword(s):

Power Output ◽

Peak Power ◽

Muscle Power ◽

Cycle Ergometer ◽

Dynamic Exercise ◽

Maximal Power ◽

Maximal Power Output ◽

Control Measurement ◽

Fatiguing Exercise ◽

Rate Of Decline

The effect of fatigue as a result of a standard submaximal dynamic exercise on maximal short-term power output generated at different contraction velocities was studied in humans. Six subjects performed 25-s maximal efforts on an isokinetic cycle ergometer at five different pedaling rates (60, 75, 90, 105, and 120 rpm). Measurements of maximal power output were made under control conditions [after 6 min of cycling at 30% maximal O2 uptake (VO2max)] and after fatiguing exercise that consisted of 6 min of cycling at 90% VO2max with a pedaling rate of 90 rpm. Compared with control values, maximal peak power measured after fatiguing exercise was significantly reduced by 23 +/- 19, 28 +/- 11, and 25 +/- 11% at pedaling rates of 90, 105, and 120 rpm, respectively. Reductions in maximum peak power of 11 +/- 8 and 14 +/- 8% at 60 and 75 rpm, respectively, were not significant. The rate of decline in peak power during the 25-s control measurement was least at 60 rpm (5.1 +/- 2.3 W/s) and greatest at 120 rpm (26.3 +/- 13.9 W/s). After fatiguing exercise, the rate of decline in peak power at pedaling rates of 105 and 120 rpm decreased significantly from 21.5 +/- 9.0 and 26.3 +/- 13.9 W/s to 10.0 +/- 7.3 and 13.3 +/- 6.9 W/s, respectively. These experiments indicate that fatigue induced by submaximal dynamic exercise results in a velocity-dependent effect on muscle power. It is suggested that the reduced maximal power at the higher velocities was due to a selective effect of fatigue on the faster fatigue-sensitive fibers of the active muscle mass.

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Efectos de la Potenciación Post-Activación con cargas de máxima potencia sobre el rendimiento en sprint y cambio de dirección en jugadores de baloncesto (Effects of Post-Activation Potentiation with maximal power loads on Sprint and Change of Direction p

Retos ◽

10.47197/retos.v41i0.82105 ◽

2021 ◽

Vol 41 ◽

pp. 648-652

Author(s):

Julio López-Álvarez ◽

Alberto Sánchez-Sixto

Keyword(s):

Power Output ◽

Maximal Power ◽

Incremental Test ◽

Basketball Players ◽

Maximal Power Output ◽

Warm Up ◽

Change Of Direction ◽

Before And After ◽

Output Load ◽

First Session

El objetivo de este estudio fue comprobar el efecto de la realización de una Potenciación Post-Activación (PPA) a través del ejercicio de media sentadilla sobre el rendimiento en sprint y cambio de dirección en jugadores de baloncesto. 12 jugadores de baloncesto participaron en esta investigación realizando dos sesiones. En la primera sesión, realizaron un test incremental de media sentadilla en multipower para conocer la carga con la que generaban la máxima potencia durante la fase concéntrica. En la segunda sesión, tras un calentamiento estandarizado, realizaron los test de sprint (30 m) y cambio de dirección (V-Cut test). Posteriormente, hicieron seis repeticiones de media sentadilla con la carga de máxima potencia de la fase concéntrica obtenida en la primera sesión. Tras cuatro minutos de descanso volvieron a realizar los test de sprint y cambio de dirección. El tiempo en el sprint antes y después de la potenciación fue 4,72 ± 0,25 segundos y 4,71 ± 0,25 segundos, respectivamente. En el V-Cut el tiempo del test antes de la potenciación fue de 8,06 ± 0,44 segundos y tras ella de 7,98 ± 0,38 segundos. El protocolo de PPA basado en la realización de media sentadilla con la carga con la que se desarrolla la máxima potencia durante la fase concéntrica no sirvió como potenciador del rendimiento en sprint y cambio de dirección en jugadores de baloncesto. Abstract. The aim of this study was to determine the effects of a Post-Activation Potentiation (PAP) protocol based on half squat on sprint and change of direction performance. 12 basketball players participated in this investigation performing two sessions. In the first session, participants executed a half squat incremental test in a Smith machine in order to determine maximal power output during the concentric phase. In the second session, after a standardized warm-up, participants performed a sprint test (30 m) and a change of direction test (V-Cut test). After that, the players performed six half squat repetitions with the maximal power output load obtained in the first session. After four minutes rest, they performed the sprint and the change of direction test. Sprint time was 4.72 ± 0.25 s before PAP and 4.71 ± 0.25 s after PAP. V-Cut test was 8.06 ± 0.44 s and 7.98 ± 0.38 s before and after PAP, respectively. A PAP protocol based on half squat with maximal power output during concentric phase load did not serve to enhance sprint and change of direction performance in basketball players.

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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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