The Relationship Among Peak Power Output, Lactate Threshold, and Short-Distance Cycling Performance: Effects of Incremental Exercise Test Design

2006 ◽  
Vol 20 (1) ◽  
pp. 157 ◽  
Author(s):  
Lars R. McNaughton ◽  
Simon Roberts ◽  
David J. Bentley
Keyword(s):  
Exercise Test ◽  
Short Distance ◽  
Lactate Threshold ◽  
Peak Power ◽  
Cycling Performance ◽  
Peak Power Output ◽  
Test Design ◽  
Incremental Exercise Test ◽  
Performance Effects ◽  
The Relationship

THE RELATIONSHIP BETWEEN PEAK POWER OUTPUT AND 30-MIN CYCLING PERFORMANCE

2003 ◽  
Vol 35 (Supplement 1) ◽  
pp. S337
Author(s):  
D J. Bentley ◽  
L R. McNaughton ◽  
V E. Vleck ◽  
J Hatcher
Keyword(s):  
Power Output ◽  
Peak Power ◽  
Cycling Performance ◽  
Peak Power Output ◽  
The Relationship

scholarly journals Relationship Between Critical Power and Different Lactate Threshold Markers in Recreational Cyclists

2021 ◽  
Vol 12 ◽  
Author(s):  
Pedro L. Valenzuela ◽  
Lidia B. Alejo ◽  
Almudena Montalvo-Pérez ◽  
Jaime Gil-Cabrera ◽  
Eduardo Talavera ◽  
...  
Keyword(s):  
Power Output ◽  
Lactate Threshold ◽  
Peak Power ◽  
Critical Power ◽  
Strong Association ◽  
Peak Power Output ◽  
Strong Correlations ◽  
Limits Of Agreement ◽  
Blood Lactate Accumulation ◽  
The Relationship

Purpose: To analyze the relationship between critical power (CP) and different lactate threshold (LT2) markers in cyclists.Methods: Seventeen male recreational cyclists [33 ± 5 years, peak power output (PO) = 4.5 ± 0.7 W/kg] were included in the study. The PO associated with four different fixed (onset of blood lactate accumulation) and individualized (Dmaxexp, Dmaxpol, and LTΔ1) LT2 markers was determined during a maximal incremental cycling test, and CP was calculated from three trials of 1-, 5-, and 20-min duration. The relationship and agreement between each LT2 marker and CP were then analyzed.Results: Strong correlations (r = 0.81–0.98 for all markers) and trivial-to-small non-significant differences (Hedges’ g = 0.01–0.17, bias = 1–9 W, and p > 0.05) were found between all LT2 markers and CP with the exception of Dmaxexp, which showed the strongest correlation but was slightly higher than the CP (Hedges’ g = 0.43, bias = 20 W, and p < 0.001). Wide limits of agreement (LoA) were, however, found for all LT2 markers compared with CP (from ±22 W for Dmaxexp to ±52 W for Dmaxpol), and unclear to most likely practically meaningful differences (PO differences between markers >1%, albeit <5%) were found between markers attending to magnitude-based inferences.Conclusion: LT2 markers show a strong association and overall trivial-to-small differences with CP. Nevertheless, given the wide LoA and the likelihood of potentially meaningful differences between these endurance-related markers, caution should be employed when using them interchangeably.

scholarly journals Influence of Warm-Up Prior to Incremental Exercise Test on Aerobic Performance in Physically Active Men

2019 ◽  
Vol 26 (3) ◽  
pp. 9-13 ◽  
Author(s):  
Natalia Danek ◽  
Kamil Michalik ◽  
Rafał Hebisz ◽  
Marek Zatoń
Keyword(s):  
Oxygen Uptake ◽  
Exercise Test ◽  
Peak Power ◽  
Minute Ventilation ◽  
Incremental Exercise ◽  
Peak Power Output ◽  
Physically Active ◽  
Warm Up ◽  
Physiological Variables ◽  
Incremental Exercise Test

AbstractIntroduction. The aim of the study was to verify the influence of warm-up before a ramp incremental exercise test with linearly increasing loads on the maximal values of physiological variables which determine performance.Material and methods. Thirteen healthy and physically active male students (age = 23.3 ± 1.5 years, body height = 179.1 ± 8.6 cm and body mass = 79.5 ± 9.1 kg) completed a cross-over comparison of two incremental exercise test interventions – an incremental exercise test with a 15-minute warm-up at an intensity of 60% of the maximal oxygen uptake obtained in the first incremental exercise test and the same test without warm-up.Results. The peak values of physiological variables were statistically significantly higher for the incremental exercise test with warm-up, the differences between tests being 2.66% for peak power output (p = 0.039, t = 2.312, ES = 0.24), 7.75% for peak oxygen uptake (p = 0.000, t = 5.225, ES = 0.56), 7.72% for peak minute ventilation (p = 0.005, t = 3.346, ES = 0.53) and 1.62% for peak heart rate (p = 0.019, t = 2.690, ES = 0.60).Conclusions. Warm-up before a ramp incremental exercise test resulted in higher values of maximal oxygen uptake, maximal minute ventilation, maximal heart rate and peak power output.

scholarly journals Caffeine and Sprint Cycling Performance: Effects of Torque Factor and Sprint Duration

2019 ◽  
Vol 14 (4) ◽  
pp. 426-431
Author(s):  
Mark Glaister ◽  
Colin Towey ◽  
Owen Jeffries ◽  
Daniel Muniz-Pumares ◽  
Paul Foley ◽  
...  
Keyword(s):  
Peak Power ◽  
Cycling Performance ◽  
Mean Difference ◽  
Peak Power Output ◽  
Double Blind ◽  
Double Blind Placebo ◽  
Performance Effects ◽  
Sprint Cycling ◽  
Post Hoc ◽  
Sprint Duration

Purpose:To investigate the influence of torque factor and sprint duration on the effects of caffeine on sprint cycling performance.Methods:Using a counterbalanced, randomized, double-blind, placebo-controlled design, 13 men completed 9 trials. In trial 1, participants completed a series of 6-s sprints at increasing torque factors to determine the torque factor, for each individual, that elicited the highest (Toptimal) peak power output (PPO). The remaining trials involved all combinations of torque factor (0.8 N·m−1·kg−1vsToptimal), sprint duration (10 s vs 30 s), and supplementation (caffeine [5 mg·kg−1] vs placebo).Results:There was a significant effect of torque factor on PPO, with higher values atToptimal(mean difference 168 W; 95% likely range 142–195 W). There was also a significant effect of sprint duration on PPO, with higher values in 10-s sprints (mean difference 52 W; 95% likely range 18–86 W). However, there was no effect of supplementation on PPO (P = .056). Nevertheless, there was a significant torque factor × sprint duration × supplement interaction (P = .036), with post hoc tests revealing that caffeine produced a higher PPO (mean difference 76 W; 95% likely range 19–133 W) when the sprint duration was 10 s and the torque factor wasToptimal.Conclusion:The results of this study show that when torque factor and sprint duration are optimized, to allow participants to express their highest PPO, there is a clear effect of caffeine on sprinting performance.

scholarly journals Blood lactate threshold reflects glucose responses in horses submitted to incremental exercise test

2008 ◽  
Vol 60 (1) ◽  
pp. 256-259 ◽  
Author(s):  
G.C. Ferraz ◽  
F.H.F. D’Angelis ◽  
A.R. Teixeira-Neto ◽  
E.V.V. Freitas ◽  
J.C. Lacerda-Neto ◽  
...  
Keyword(s):  
Blood Lactate ◽  
Exercise Test ◽  
Lactate Threshold ◽  
Incremental Exercise ◽  
Incremental Exercise Test

Topical Sodium Bicarbonate: No Improvement in Blood Buffering Capacity or Exercise Performance

2020 ◽  
Vol 15 (7) ◽  
pp. 1005-1011
Author(s):  
Alannah K.A. McKay ◽  
Peter Peeling ◽  
Martyn J. Binnie ◽  
Paul S.R. Goods ◽  
Marc Sim ◽  
...  
Keyword(s):  
Body Weight ◽  
Sodium Bicarbonate ◽  
Peak Power ◽  
Cycling Performance ◽  
Blood Parameters ◽  
Buffering Capacity ◽  
Capillary Blood ◽  
Peak Power Output ◽  
Mean Power ◽  
Experimental Trials

Purpose: To assess the efficacy of a topical sodium bicarbonate (0.3 g/kg body weight NaHCO3) application (PR lotion; Amp Human) on blood buffering capacity and performance in recreationally active participants (study A) and moderately trained athletes (study B). Methods: In Study A, 10 participants completed 2 experimental trials: oral NaHCO3 (0.3 g/kg body weight + placebo lotion) or PR lotion (0.9036 g/kg body weight + oral placebo) applied 90 minutes prior to a cycling task to exhaustion (30-s sprints at 120% peak power output with 30-s rest). Capillary blood was collected and analyzed for pH, bicarbonate, and lactate every 10 minutes throughout the 90-minute loading period and postexercise at 5, 10, and 15 minutes. In Study B, 10 cyclists/triathletes completed 2 experimental trials, applying either PR or placebo lotion 30 minutes prior to a cycling performance task (3 × 30-s maximal sprints with 90-s recovery). Capillary blood samples were collected at baseline, preexercise, and postexercise and analyzed as per study A. Results: In Study A, pH and bicarbonate were significantly elevated from baseline after 10 minutes in the oral NaHCO3 condition and throughout recovery compared with no elevation in the PR lotion condition (P < .001). No differences in cycling time occurred between PR lotion (349 [119] s) and oral NaHCO3 (363 [80] s; P = .697). In Study B, no differences in blood parameters, mean power (P = .108), or peak power (P = .448) were observed between conditions. Conclusions: PR lotion was ineffective in altering blood buffering capacity or enhancing performance in either trained or untrained individuals.

Cycling Efficiency and Performance Following Short-Term Training Using Uncoupled Cranks

2009 ◽  
Vol 4 (1) ◽  
pp. 18-28 ◽  
Author(s):  
Andrew D. Williams ◽  
Isaac Selva Raj ◽  
Kristie L. Stucas ◽  
James W. Fell ◽  
Diana Dickenson ◽  
...  
Keyword(s):  
Lactate Threshold ◽  
Performance Enhancement ◽  
Average Power ◽  
Time Trial ◽  
Mechanical Efficiency ◽  
Cycling Performance ◽  
Peak Power Output ◽  
Gross Efficiency ◽  
And Performance ◽  
Study Participants

Objectives:Uncoupled cycling cranks are designed to remove the ability of one leg to assist the other during the cycling action. It has been suggested that training with this type of crank can increase mechanical efficiency. However, whether these improvements can confer performance enhancement in already well-trained cyclists has not been reported.Method:Fourteen well-trained cyclists (13 males, 1 female; 32.4 ± 8.8 y; 74.5 ± 10.3 kg; Vo2max 60.6 ± 5.5 mL·kg−1·min−1; mean ± SD) participated in this study. Participants were randomized to training on a stationary bicycle using either an uncoupled (n = 7) or traditional crank (n = 7) system. Training involved 1-h sessions, 3 days per week for 6 weeks, and at a heart rate equivalent to 70% of peak power output (PPO) substituted into the training schedule in place of other training. Vo2max, lactate threshold, gross efficiency, and cycling performance were measured before and following the training intervention. Pre- and post testing was conducted using traditional cranks.Results:No differences were observed between the groups for changes in Vo2max, lactate threshold, gross efficiency, or average power maintained during a 30-minute time trial.Conclusion:Our results indicate that 6 weeks (18 sessions) of training using an uncoupled crank system does not result in changes in any physiological or performance measures in well-trained cyclists.

Peak power output, the lactate threshold, and time trial performance in cyclists

2001 ◽  
Vol 33 (12) ◽  
pp. 2077-2081 ◽  
Author(s):  
DAVID J. BENTLEY ◽  
LARS R. MCNAUGHTON ◽  
DYLAN THOMPSON ◽  
VERONICA E. VLECK ◽  
ALAN M. BATTERHAM
Keyword(s):  
Power Output ◽  
Lactate Threshold ◽  
Peak Power ◽  
Time Trial ◽  
Peak Power Output ◽  
Time Trial Performance ◽  
Trial Performance
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