Time of VO2max Plateau and Post-Exercise Oxygen Consumption During Incremental Exercise Testing in Young Mountain Bike and Road Cyclists

Abstract

The purpose of this study was to compare markers of glycolytic metabolism in response to the Wingate test and the incremental test in road and mountain bike cyclists, who not different performance level and aerobic capacity. All cyclists executed the Wingate test and incremental test on a cycle ergometer. Maximal power and average power were determined during the Wingate test. During the incremental test the load was increased by 50 W every 3 min, until volitional exhaustion and maximal aerobic power (APmax), maximal oxygen uptake (VO2max), and time of VO2max plateau (Tplateau) were determined. Post-exercise measures of oxygen uptake (VO2post), carbon dioxide excretion, (VCO2post), and the ratio between VCO2/VO2 (RERpost) were collected for 3 min immediately after incremental test completion. Arterialized capillary blood was drawn to measure lactate (La-) and hydrogen (H+) ion concentrations in 3 min after each test. The data demonstrated significant differences between mountain bike and road cyclists for Tplateau, VO2post, VCO2post, La- which was higher-, and RERpost which was lower-, in mountain bike cyclists compare with road cyclists. No differences were observed between mountain bike and road cyclists for APmax, VO2max, H+ and parameters measured in the Wingate test. Increased time of VO2max plateau concomitant to larger post-exercise La- and VO2 values suggests greater anaerobic contribution during incremental testing efforts by mountain bike cyclists compared with road cyclists.

A Subject-Tailored Variability-Based Platform for Overcoming the Plateau Effect in Sports Training: A Narrative Review

“…Throughout the incremental test, the load was amplified every 3 min until exhaustion, and maximal aerobic power (APmax), VO 2 max, and time of VO 2 max plateau (Tplateau) were determined. Tplateau, VO 2 post differed between the mountain and road cyclists [3].…”

“…Adaptation is a result of multiple mechanisms [1][2][3][4][5][6][7]. There is a change in the strength of the triceps brachii after training without correlation to fatigue rate (FR) or decrease in strength (DS).…”

Real Assessment of Maximum Oxygen Uptake as a Verification After an Incremental Test Versus Without a Test

“…It has been suggested that achieving a VO 2 plateau in the final phase of the GXT is proof that a VO 2max measurement is accurate (Howley et al, 1995). However, it has been documented that in many subjects (both athletes and non-athletes), it is impossible to separate the plateau phase when reaching VO 2max (Lucia et al, 2006;Schaun, 2017;Hebisz et al, 2018). The other criteria for accurately measuring VO 2max -analysis of peak respiratory quotient, peak heart rate (HR), and post-workout lactate concentration-have also been widely discussed (Howley et al, 1995;Duncan et al, 1997;Beltz et al, 2016).…”

Simulation of the Relationship Between Exercise and Cardiopulmonary Function at High Altitude

“…Due to its high altitude, low air pressure, and low oxygen content, this special environment is more conducive to improving people's physical strength and endurance quality, so as to help athletes maximize their inner potential. 1,2 Exercising in a plateau environment has the greatest impact on the exerciser's cardiopulmonary function, and the improvement of the athlete's physical fitness depends to a high degree on the improvement of the cardiopulmonary function. It can provide a reliable theoretical basis for exercisers by analyzing the relationship between the them.…”