Comparison between Slow Components of HR and V˙O2 Kinetics: Functional Significance

Zuccarelli, Lucrezia; Porcelli, Simone; Rasica, Letizia; Marzorati, Mauro; Grassi, Bruno

doi:10.1249/mss.0000000000001612

Cited by 50 publications

(75 citation statements)

References 24 publications

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“…The fatigue and the exhaustion observed in OB during moderate intensity exercise do not seem to be related to the "slow component" of variables such as HR (see Fig. 2), as hypothesized in a previous study by Zuccarelli et al 19 . A clear HR slow component during moderate intensity exercise was indeed present both in OB and in CTRL, but fatigue and premature exhaustion occurred only in OB.…”

Section: Discussionsupporting

confidence: 70%

Acute respiratory muscle unloading improves time-to-exhaustion during moderate- and heavy-intensity cycling in obese adolescent males

Alemayehu

Salvadego

Tringali

et al. 2020

Sci Rep

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Obesity significantly impairs breathing during exercise. The aim was to determine, in male obese adolescents (OB), the effects of acute respiratory muscle unloading, obtained by switching the inspired gas from ambient air (AIR) to a normoxic helium + oxygen gas mixture (HeO2) (AIR → HeO2) during moderate [below gas exchange threshold (GET)] and heavy [above GET] constant work rate cycling. Ten OB [age 16.0 ± 2.0 years (mean ± SD); body mass index (BMI) 38.9 ± 6.1 kg/m2] and ten normal-weight age-matched controls (CTRL) inspired AIR for the entire exercise task, or underwent AIR → HeO2 when they were approaching volitional exhaustion. In OB time to exhaustion (TTE) significantly increased in AIR → HeO2 vs. AIR during moderate [1524 ± 480 s vs. 1308 ± 408 (P = 0.024)] and during heavy [570 ± 306 s vs. 408 ± 150 (P = 0.0154)] exercise. During moderate exercise all CTRL completed the 40-min task. During heavy exercise no significant differences were observed in CTRL for TTE (582 ± 348 s [AIR → HeO2] vs. 588 ± 252 [AIR]). In OB, but not in CTRL, acute unloading of respiratory muscles increased TTE during both moderate- and heavy-exercise. In OB, but not in CTRL, respiratory factors limit exercise tolerance during both moderate and heavy exercise.

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Section: Discussionsupporting

confidence: 70%

Acute respiratory muscle unloading improves time-to-exhaustion during moderate- and heavy-intensity cycling in obese adolescent males

Alemayehu

Salvadego

Tringali

et al. 2020

Sci Rep

Self Cite

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“…On the contrary, HR continued to increase over time throughout the trials. This phenomenon is compatible with the appearance of the socalled "slow component of HR", i.e., a slow increase of HR occurring at about 120-180 s into exercise, possibly also in absence of a slow component of VO 2 (Zuccarelli et al, 2018). The lack of literature about the adaptation of metabolic parameters to treadmill running makes it difficult to compare the results of the current study with other researches.…”

Section: Discussionsupporting

confidence: 65%

Time-course of running treadmill adaptation in novice treadmill runners

Simoni

Pasquini

Pancani

et al. 2020

Journal of Sports Sciences

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Studies on running biomechanics and energetics are usually conducted on a treadmill. To ensure that locomotion on a treadmill is comparable to locomotion overground, participants need to be expert in the use of the device. This study aimed to identify the number and duration of sessions needed to obtain stable measurements for spatiotemporal and metabolic parameters in unexperienced treadmill runners. Fourteen male recreational runners performed three 15-min treadmill running trials in different days at a submaximal speed. Spatiotemporal and metabolic parameters were registered at minutes: 5, 10, 15 and their within-trial and between-trial changes were analysed using a two-way repeated measures ANOVA and Bonferroni post-hoc test. Within-trial differences were found in step frequency (decreased over time), Step Length and Contact Time (increased), reaching stability at different time points. Ventilator parameters increased, reaching stability after 5-10 min, while heart rate increased progressively over time. The only between-trial differences were an increase in step length and a decrease in step frequency at min 1, between trials 1 and 3. In conclusion, at least three running trials of 15 min are required to familiarize with the device. The last 5 min of the third trial can be regarded as stable measurements.

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“…The actual power-VO 2 correlation is proposed to address this error [ 25 ]. With respect to subjects, Snyder and colleagues [ 25 ] criticise the individual assessment of training metric as they [ 26 ] collect data by subject prior executing the correlation analysis when within-subject correlation between VO 2 and further variables is appropriate for training and racing [ 55 ]. For such study [ 26 ], data collection should be developed over different within-subject measurements [ 25 ].…”

Section: Discussionmentioning

confidence: 99%

Mechanical Power in Endurance Running: A Scoping Review on Sensors for Power Output Estimation during Running

Jaén-Carrillo

Roche-Seruendo

Cartón-Llorente

et al. 2020

Sensors

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Mechanical power may act as a key indicator for physiological and mechanical changes during running. In this scoping review, we examine the current evidences about the use of power output (PW) during endurance running and the different commercially available wearable sensors to assess PW. The Boolean phrases endurance OR submaximal NOT sprint AND running OR runner AND power OR power meter, were searched in PubMed, MEDLINE, and SCOPUS. Nineteen studies were finally selected for analysis. The current evidence about critical power and both power-time and power-duration relationships in running allow to provide coaches and practitioners a new promising setting for PW quantification with the use of wearable sensors. Some studies have assessed the validity and reliability of different available wearables for both kinematics parameters and PW when running but running power meters need further research before a definitive conclusion regarding its validity and reliability.

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Comparison between Slow Components of HR and V˙O2 Kinetics: Functional Significance

Abstract: The HR slow component occurred at a lower work rate and was more pronounced than the V˙O2 slow component. Exercise prescriptions at specific HR values, when carried out for periods longer than a few minutes, could lead to premature fatigue.

Cited by 50 publications

References 24 publications

Acute respiratory muscle unloading improves time-to-exhaustion during moderate- and heavy-intensity cycling in obese adolescent males

Acute respiratory muscle unloading improves time-to-exhaustion during moderate- and heavy-intensity cycling in obese adolescent males

Time-course of running treadmill adaptation in novice treadmill runners

Mechanical Power in Endurance Running: A Scoping Review on Sensors for Power Output Estimation during Running

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