Five-Minute Power-Based Test to Predict Maximal Oxygen Consumption in Road Cycling

2021 ◽  
pp. 1-7
Author(s):  
Sebastian Sitko ◽  
Rafel Cirer-Sastre ◽  
Francisco Corbi ◽  
Isaac López-Laval
Keyword(s):  
Oxygen Consumption ◽  
Exercise Test ◽  
Power Output ◽  
Maximal Oxygen Consumption ◽  
Relative Power ◽  
Credibility Interval ◽  
Graded Exercise Test ◽  
Road Cycling ◽  
Graded Exercise ◽  
Using Data

Purpose: To examine the ability of a multivariate model to predict maximal oxygen consumption (VO2max) using performance data from a 5-minute maximal test (5MT). Methods: Forty-six road cyclists (age 38 [9] y, height 177 [9] cm, weight 71.4 [8.6] kg, VO2max 61.13 [9.05] mL/kg/min) completed a graded exercise test to assess VO2max and power output. After a 72-hour rest, they performed a test that included a 5-minute maximal bout. Performance variables in each test were modeled in 2 independent equations, using Bayesian general linear regressions to predict VO2max. Stepwise selection was then used to identify the minimal subset of parameters with the best predictive power for each model. Results: Five-minute relative power output was the best explanatory variable to predict VO2max in the model from the graded exercise test (R2 95% credibility interval, .81–.88) and when using data from the 5MT (R2 95% credibility interval, .61–.77). Accordingly, VO2max could be predicted with a 5MT using the equation VO2max = 16.6 + (8.87 × 5-min relative power output). Conclusions: Road cycling VO2max can be predicted in cyclists through a single-variable equation that includes relative power obtained during a 5MT. Coaches, cyclists, and scientists may benefit from the reduction of laboratory assessments performed on athletes due to this finding.

scholarly journals Effect of Cadence on Respiratory Response During Unloaded Cycling in Healthy Individuals

2015 ◽  
Vol 16 (1) ◽  
Author(s):  
Agnieszka D. Jastrzębska ◽  
Marcin Kowalski
Keyword(s):  
Oxygen Consumption ◽  
Aerobic Fitness ◽  
Exercise Test ◽  
Maximal Oxygen Consumption ◽  
Cycle Ergometer ◽  
Healthy Individuals ◽  
Respiratory Response ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Healthy Participants

AbstractPurpose. The aim of the study was to establish the respiratory response to unloaded cycling at different cadences. Methods. Eleven healthy participants performed a maximal graded exercise test on a cycle ergometer to assess aerobic fitness (maximal oxygen consumption: 46.27 ± 5.41 ml · min

Protein Supplementation Does Not Improve Aerobic and Anaerobic Fitness in Collegiate Dancers Performing Cycling Based High Intensity Interval Training

2021 ◽  
Author(s):  
Christopher J. Alfiero ◽  
Samantha J. Brooks ◽  
Hannah M. Bideganeta ◽  
Coby Contreras ◽  
Ann F. Brown
Keyword(s):  
Body Composition ◽  
Exercise Test ◽  
Power Output ◽  
Interval Training ◽  
Protein Supplementation ◽  
Peak Power Output ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Appendicular Skeletal Muscle ◽  
High Intensity Interval

The effects of a 6-week cycling high-intensity interval training (HIIT) concurrently with protein supplementation on aerobic and anaerobic fitness and body composition in collegiate dancers was investigated. Eighteen participants enrolled in a collegiate dance program were matched into three groups: high-protein (HP; 90 g·d-1), moderate-protein (MP; 40 g·d-1), and control (C; 0 g·d-1). All participants performed a 6-week HIIT intervention. Participants completed a graded exercise test, Wingate anaerobic test (Wingate), and dual energy x-ray absorptiometry scan before and after the intervention. Peak heart rate (HRpeak), peak oxygen uptake (VOpeak), peak power output (PPO), lactate threshold (LT), and ventilatory thresholds 1 (VT1) and 2 (VT2) were assessed during the graded exercise test. Peak power output, mean power output (MPO), and fatigue index (FI) were assessed during the Wingate. Lean mass (LM), fat mass (FM), visceral adipose tissue, appendicular skeletal muscle mass, and appendicular skeletal muscle mass index were assessed during dual energy x-ray absorptiometry. Body composition index (BCI) was calculated from pre and post LM and FM. Habitual diet was recorded weekly. Significance was set at p ≤ 0.05. No significant differences in VO2peak and percent fat mass (%FM) were observed between groups prior to the intervention. Significant main effects for time were observed for HRpeak (p = 0.02), VO2peak (p < 0.001), PPO (p < 0.01), LT (p < 0.001), VT1 (p < 0.001), and VT2 (p < 0.001) during the graded exercise test, and PPO (p < 0.01) and FI (p < 0.01) during the Wingate. Significant main effects for time were observed for LM (kg; p = 0.01) and FM (kg; p < 0.01). Body composition index was improved for all groups, however, no significant differences by group were observed. No significant differences were observed between groups for the measured outcomes (p > 0.05). Therefore, there was no effect of protein supplementation in the short 6-week intervention. This cycling based HIIT routine increased physical fitness, optimized aesthetics, and was a simple addition to an existing collegiate dance curriculum.

Reproducibility of the Rotor 2INpower Crankset for Monitoring Cycling Power Output: A Comprehensive Analysis in Different Real-Context Situations

2021 ◽  
pp. 1-6
Author(s):  
Víctor Rodríguez-Rielves ◽  
Alejandro Martínez-Cava ◽  
Ángel Buendía-Romero ◽  
José Ramón Lillo-Beviá ◽  
Javier Courel-Ibáñez ◽  
...  
Keyword(s):  
Exercise Test ◽  
Standard Error ◽  
Power Output ◽  
Gold Standard ◽  
Graded Exercise Test ◽  
Wide Range ◽  
Graded Exercise ◽  
Standard Error Of Measurement ◽  
Acceptable Agreement ◽  
Error Of Measurement

Purpose: To examine the reproducibility (intradevice and interdevice agreement) of the Rotor 2INpower device under a wide range of cycling conditions. Methods: Twelve highly trained male cyclists and triathletes completed 5 cycling tests, including graded exercise tests at different cadences (70–100 rpm), workloads (100–650 W), pedaling positions (seated and standing), and vibration conditions (20–40 Hz) and an 8-second maximal sprint (>1000 W). An intradevice analysis included a comparison between the power output registered by 3 units of Rotor 2INpower, whereas the power output provided by each one of these units and the gold-standard SRM crankset were compared for the interdevice analysis. Among others, statistical calculations included the standard error of measurement, expressed in absolute (in watts) and relative terms as the coefficient of variation (CV). Results: Except for the graded exercise test seated at 100 rpm/100 W (CV = 10.2%), the intradevice analysis showed an acceptable magnitude of error (CV ≤ 6.9%, standard error of measurement ≤ 12.3 W) between the 3 Rotor 2INpower. Similarly, these 3 units showed an acceptable agreement with the gold standard in all graded exercise test situations (CV ≤ 4.0%, standard error of measurement ≤ 13.1 W). On the other hand, both the intradevice and interdevice agreements proved to be slightly reduced under high cadences (intradevice: CV ≤ 10.2%; interdevice: CV ≤ 4.0%) and vibration (intradevice: CV ≤ 4.0%; interdevice: CV ≤ 3.6%), as well as during standing pedaling (intradevice: CV ≤ 4.1%; interdevice: CV ≤ 2.5%). Although within the limits of an acceptable agreement, measurement errors increased during the sprint tests (CV ≤ 7.4%). Conclusions: Based on these results, the Rotor 2INpower could be considered a reproducible tool to monitor power output in most cycling situations.

Development of an On-Water Graded Exercise Test for Flat-Water Sprint Kayak Athletes

2019 ◽  
Vol 14 (9) ◽  
pp. 1244-1249 ◽  
Author(s):  
Chelsie E. Winchcombe ◽  
Martyn J. Binnie ◽  
Matthew M. Doyle ◽  
Cruz Hogan ◽  
Peter Peeling
Keyword(s):  
Oxygen Consumption ◽  
Exercise Test ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Intraclass Correlation ◽  
Rating Of Perceived Exertion ◽  
Stroke Rate ◽  
Repeated Measures Design ◽  
Graded Exercise Test ◽  
Graded Exercise

Purpose: To determine the reliability and validity of a power-prescribed on-water (OW) graded exercise test (GXT) for flat-water sprint kayak athletes. Methods: Nine well-trained sprint kayak athletes performed 3 GXTs in a repeated-measures design. The initial GXT was performed on a stationary kayak ergometer in the laboratory (LAB). The subsequent 2 GXTs were performed OW (OW1 and OW2) in an individual kayak. Power output (PWR), stroke rate, blood lactate, heart rate, oxygen consumption, and rating of perceived exertion were measured throughout each test. Results: Both PWR and oxygen consumption showed excellent test–retest reliability between OW1 and OW2 for all 7 stages (intraclass correlation coefficient > .90). The mean results from the 2 OW GXTs (OWAVE) were then compared with LAB, and no differences in oxygen consumption across stages were evident (P ≥ .159). PWR was higher for OWAVE than for LAB in all stages (P ≤ .021) except stage 7 (P = .070). Conversely, stroke rate was lower for OWAVE than for LAB in all stages (P < .010) except stage 2 (P = .120). Conclusions: The OW GXT appears to be a reliable test in well-trained sprint kayak athletes. Given the differences in PWR and stroke rate between the LAB and OW tests, an OW GXT may provide more specific outcomes for OW training.

Plasma catecholamine and lactate response during graded exercise with varied glycogen conditions

1991 ◽  
Vol 71 (4) ◽  
pp. 1427-1433 ◽  
Author(s):  
D. A. Podolin ◽  
P. A. Munger ◽  
R. S. Mazzeo
Keyword(s):  
Exercise Test ◽  
Ventilatory Threshold ◽  
Maximal Oxygen Consumption ◽  
Plasma Catecholamines ◽  
Work Load ◽  
Bicycle Ergometer ◽  
Plasma Catecholamine ◽  
Plasma Lactate ◽  
Graded Exercise Test ◽  
Graded Exercise

The relationships between the lactate threshold (TLa), plasma catecholamines, and ventilatory threshold (TVE) were examined under normal and glycogen-depleted conditions. Nine male subjects performed a graded exercise test on a bicycle ergometer in a normal glycogen (NG) state and in a glycogen-depleted (GD) state to determine if manipulation of muscle glycogen content would affect their ventilatory, lactate, and catecholamine responses. High correlations were found between plasma lactate and the two catecholamines, epinephrine (r = 0.964) and norepinephrine (r = 0.965) under both conditions. The GD protocol resulted in a shift in the TLa to a later work rate; inflections in epinephrine and norepinephrine shifted in a coordinated manner. TVE and TLa occurred at similar work loads under NG conditions [67.2 +/- 1.5 and 65.6 +/- 2.3% maximal oxygen consumption (VO2max), respectively], but TLa occurred at a later work load (75.3 +/- 1.9% VO2max) compared with TVE (68.3 +/- 1.6% VO2max) under GD conditions. These results suggest a causal relationship between plasma lactate and epinephrine during a graded exercise test under the glycogen conditions studied. Although an association existed between ventilation and lactate, this relationship was not as strong.

Validity of a Submaximal 1-Mile Track Jog Test in Predicting VO2max in Fit Teenagers

2000 ◽  
Vol 12 (1) ◽  
pp. 80-90 ◽  
Author(s):  
Brian R. Hunt ◽  
James D. George ◽  
Pat R. Vehrs ◽  
A. Garth Fisher ◽  
Gilbert W. Fellingham
Keyword(s):  
Heart Rate ◽  
Oxygen Consumption ◽  
Cross Validation ◽  
Maximal Oxygen Consumption ◽  
Prediction Equation ◽  
Open Circuit ◽  
Graded Exercise Test ◽  
Graded Exercise ◽  
Specific Prediction ◽  
Maximal Effort

The purpose of this study was to validate the ability of the 1-mile jog test to predict VO2max in fit teenagers. Forty-one males and 42 females performed the steady-state, submaximal jogging test on an indoor track, along with a maximal graded exercise test (GXT) on a treadmill. Open circuit calorimetry was used during the GXT to measure maximal oxygen consumption (VO2max). We generated the following age-specific prediction equation applicable to boys and girls 13–17 years old (n = 83, Radj = .88, SEE = 3.26 ml · kg−1 · min−1): VO2max = 92.91 + 6.50 × gender (0 = female, 1 = male) − 0.141 × body mass (kg) − 1.562 × jog time (min) − 0.125 × heart rate (bpm). Cross-validation results were acceptable (SEEpress = 3.44 ml · kg−1 · min−1). As a field test, the submaximal 1-mile jogging test may alleviate problems associated with pacing, motivation, discouragement, injury, and fatigue that are sometimes associated with maximal effort timed or distance run tests.

Analysis of Peak Oxygen Consumption and Heart Rate during Elliptical and Treadmill Exercise

2001 ◽  
Vol 10 (1) ◽  
pp. 48-56 ◽  
Author(s):  
John A. Mercer ◽  
Janet S. Dufek ◽  
Barry T. Bates
Keyword(s):  
College Students ◽  
Heart Rate ◽  
Oxygen Consumption ◽  
Exercise Test ◽  
Treadmill Exercise ◽  
Peak Oxygen Consumption ◽  
Physically Active ◽  
Graded Exercise Test ◽  
Type Design ◽  
Graded Exercise

Objective:To compare peak oxygen consumption (VO2) and heart rate (HR) during treadmill (TM) running and exercise on an elliptical trainer (ET).Design:A graded exercise test (GXT) during TM running and ET exercise.Participants:Physically active college students (N = 14; 25 ± 4.6 years). Each completed a TM GXT and ET GXT on separate days.Results:There were no differences in either VO2peak or peak HR between TM (53.0 ± 7.7 ml · kg–1 · min–1, 193.4 ± 9.4 bpm) and ET (51.6 ± 10.7 ml · kg–1 · min–1, 191.2 ± 11.5 bpm; P > .05). Correlations between HR and VO2 data for all stages of exercise for all subjects were similar between machines (ET: r = .88; TM: r = .95; P > .05).Conclusion:No adjustments to the target HR used during TM running are necessary when using the ET.

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