Comparison of Wpeak, VO2peak and the ventilation threshold from two different incremental exercise tests: Relationship to endurance performance

Bentley, David J.; McNaughton, Lars R.

doi:10.1016/s1440-2440(03)80268-2

Cited by 73 publications

(74 citation statements)

References 32 publications

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“…Numerous earlier studies reported an association between lactate and ventilatory thresholds and exercise performance (3,19,25,26,50). However, these studies focused on the relationships among direct blood lactate measurements (19,26,50) or indirect methods using gas exchange (3,25), but not between blood-and ventilation-based methods and exercise performance. Moreover, these associations have not been thoroughly explored in hot or cool environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

“…While prior studies have examined cycling over shorter (Ͻ30 min) or longer (Ͼ60 min) time-trial performances (3,14,36), we chose to use a 1-h time trial, because it best approximates the time required to complete a 40-km time trial in trained cyclists (4), which is one of the most common distances used in competitive cycling time-trial races. It would be naïve to presume that one specific lactate or ventilatory parameter would best predict endurance performance for all events from 30 min to 3 h (6, 47).…”

Section: Discussionmentioning

confidence: 99%

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Lactate threshold predicting time-trial performance: impact of heat and acclimation

Lorenzo

Minson

Babb

et al. 2011

Journal of Applied Physiology

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Lorenzo S, Minson CT, Babb TG, Halliwill JR. Lactate threshold predicting time-trial performance: impact of heat and acclimation. J Appl Physiol 111: 221-227, 2011. First published April 28, 2011 doi:10.1152/japplphysiol.00334.2011The relationship between exercise performance and lactate and ventilatory thresholds under two distinct environmental conditions is unknown. We examined the relationships between six lactate threshold methods (blood-and ventilation-based) and exercise performance in cyclists in hot and cool environments. Twelve cyclists performed a lactate threshold test, a maximal O2 uptake (V O2max) test, and a 1-h time trial in hot (38°C) and cool (13°C) conditions, before and after heat acclimation. Eight control subjects completed the same tests before and after 10 days of identical exercise in a cool environment. The highest correlations were observed with the blood-based lactate indexes; however, even the indirect ventilation-based indexes were well correlated with mean power during the time trial. Averaged bias was 15.4 Ϯ 3.6 W higher for the ventilation-than the blood-based measures (P Ͻ 0.05). The bias of blood-based measures in the hot condition was increased: the time trial was overestimated by 37.7 Ϯ 3.6 W compared with only 24.1 Ϯ 3.2 W in the cool condition (P Ͻ 0.05). Acclimation had no effect on the bias of the blood-based indexes (P ϭ 0.51) but exacerbated the overestimation by some ventilation-based indexes by an additional 34.5 Ϯ 14.1 W (P Ͻ 0.05). Blood-based methods to determine lactate threshold show less bias and smaller variance than ventilation-based methods when predicting time-trial performance in cool environments. Of the blood-based methods, the inflection point between steady-state lactate and rising lactate (INFL) was the best method to predict time-trial performance. Lastly, in the hot condition, ventilation-based predictions are less accurate after heat acclimation, while blood-based predictions remain valid in both environments after heat acclimation. heat stress; heat acclimation; heat acclimatization; critical power; endurance exercise SEVERAL PHYSIOLOGICAL PARAMETERS, namely, maximal O 2 uptake (V O 2max ), lactate threshold, ventilatory threshold, fraction of slow-twitch fibers, and running economy, are known to be related to (or predictive of) endurance exercise performance (12,13,19). As the margins for success in athletic competition are often quite small, coaches, athletes, and physiologists have long been interested in assessing an individual athlete's lactate or ventilatory threshold, in an effort to use such information to design more effective training plans, optimize an athlete's performance, or make race-day predictions. The terms "lactate threshold" and "ventilatory threshold" have generally been used to define the highest work rate or O 2 uptake (V O 2 ) at which athletes can maintain their efforts over a specified time frame. To the best of our knowledge, no study has focused on simultaneously determining the accuracy of lactate threshold vs. ventila...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Lactate threshold predicting time-trial performance: impact of heat and acclimation

Lorenzo

Minson

Babb

et al. 2011

Journal of Applied Physiology

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“…, an incremental test with a mean duration of 9.1 (SD 0.8) min resulted in a mean respiratory exchange ratio of 1.21 (SD 0.05; range 1.18 to 1.26), compared to a significantly lower mean respiratory exchange ratio of 1.08 (SD 0.02; range 1.06 to 1.10) for a test with a mean duration of 24.4 (SD 2.6) min (Bentley and McNaughton 2003). Consequently, none of the subjects satisfied a respiratory exchange ratio criterion threshold of 1.15 in the long test, but the same subjects all satisfied the criterion in the short test.…”

Section: Novel Standardizedmentioning

confidence: 91%

“…The test protocol dependency of the respiratory exchange ratio criterion is apparent when considering that longer incremental tests protocols used for max 2 O V  determination have been shown to elicit significantly lower respiratory exchange ratio values (Bentley and McNaughton 2003;Lukaski et al 1989;Pollock et al 1982). One study reported that despite no significant difference in…”

Section: Novel Standardizedmentioning

confidence: 99%

Evaluation of true maximal oxygen uptake based on a novel set of standardized criteria

Midgley

Carroll

Marchant

et al. 2009

Appl. Physiol. Nutr. Metab.

112

135

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“…This was something that was not observed with the SMAT, probably due to a higher VO 2 peak reached. Another useful index for aerobic endurance in sports, like triathlon and cycling, is the VT (Bentley & McNaughton, 2003) and this can distinguish aerobic fitness when expressed in relation to %VO 2 max (Loftin & Warren, 1994). The ability to sustain high aerobic intensity exercise during an endurance exercise appears to be related to VT relative to %VO 2 peak (Amann et al, 2004;Roels et al, 2005).…”

Section: Aerobic Capacitymentioning

confidence: 99%

XP-Antarctik Expedition: The Effect of a Month-Long Expedition in Antarctica on Physiological Performance

Parent¹,

Martín²,

Morales³

et al. 2018

Journal of Human Performance in Extreme Environments

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Antarctica is a challenging habitat for humans. A group of 6 explorers (3 women and 3 men) participated in an expedition in Antarctica. The objective was to observe the physiological acclimatization of the explorers using the following strategies: physical preparation, highcaloric nutritional intake, and the latest physiological monitoring and outdoor equipment. Anthropometric measures (dual x-ray absorptiometry), specific maximal aerobic test, maximal aerobic running speed test, submaximal aerobic cold testing, strength tests (grip strength, leg press and chin up), and endurance tests (bar suspension and chair position) were conducted pre-and post-expedition. Due to the sample size, a paired t-test was used for normally distributed data and non-parametric (Wilcoxon) to compare values pre-and post-expedition. Effect sizes are presented as Cohen's d. The lean mass for the women was significantly higher after the expedition (45.4 ¡ 4.4 vs. 47.1 ¡ 4.1 kg; p 5 0.040, d 5 1.86); however, no significant difference was observed for the men (66.7 ¡ 7.3 vs. 66.0 ¡ 5.7 kg; p 5 0.581, d 5 0.11). Pre-and post-expedition values were significantly different for the specific maximal aerobic test, where the VO 2 peak was 40.8 ¡ 4.2 vs. 46.9 ¡ 7.4 ml/kg/min, respectively (p 5 0.027, d 5 1.01), but no significant difference was observed for the other aerobic tests. The muscular testing did not change significantly, except for the left leg one maximal repetition (295 ¡ 110 vs. 364 ¡ 135 lb, preand post-expedition respectively, p 5 0.031, d 5 20.56). The overall preparation for the expedition appears to be a key aspect in order to countermeasure the physical ability decay during an Antarctica expedition. However, further studies will need to be developed to discern the importance of the preparation components.

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Comparison of Wpeak, VO2peak and the ventilation threshold from two different incremental exercise tests: Relationship to endurance performance

Cited by 73 publications

References 32 publications

Lactate threshold predicting time-trial performance: impact of heat and acclimation

Lactate threshold predicting time-trial performance: impact of heat and acclimation

Evaluation of true maximal oxygen uptake based on a novel set of standardized criteria

XP-Antarctik Expedition: The Effect of a Month-Long Expedition in Antarctica on Physiological Performance

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