Adaptation of Pulmonary Oxygen Consumption Slow Component Following 6 Weeks of Exercise Training Above and Below the Lactate Threshold in Untrained Men

Ocel, J.; Miller, Larry E.; Pierson, Lee M.; Wootten, David F.; Hawkins, Brian T.; Myers, Jonathan; Herbert, William G.

doi:10.1378/chest.124.6.2377

Cited by 3 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our study, the TE expressed as the CV was 13.6% for V _ O 2 SC, suggesting that the amplitudes of the V _ O 2 kinetics responses can identify the effects of the interventions aimed at improving the V _ O 2 SC in active individuals. Ocel et al (21) analyzed untrained individuals and obtained training-related changes in the V _ O 2 SC of approximately 300-500 ml$min 21 (57-71%), substantially exceeding the 1.5-2.0 times the TE obtained in our study. The TE expressed as CV for t p (;21%) suggests that the time-based parameters have a moderate chance of reliably detecting a change after the interventions aimed at improving the t p in active individuals.…”

Section: Discussioncontrasting

confidence: 67%

Reliability of Cardiorespiratory Parameters During Cycling Exercise Performed at the Severe Domain in Active Individuals

Barbosa

Montagnana²,

Denadai³

et al. 2014

Journal of Strength and Conditioning Research

View full text Add to dashboard Cite

The purpose of this study was to determine the test-retest reliability of cardiorespiratory parameters during cycling exercise performed at severe domain in active individuals. Thirteen active males (24.5 ± 4.5 years) performed the following tests: (a) an incremental test to determine V[Combining Dot Above]O2max and the intensity associated with VO2max (IVO2max); and (b) 4 repetitions of square-wave transitions from rest to a power corresponding to 95% IVO2max to determine the parameters of VO2 kinetics and time to exhaustion (Tlim). Participants performed only 2 transitions on any given day. The interval between the 2 experimental sessions was 48-72 hours. The intraclass correlation coefficient (ICC) and typical error as the coefficient of variation were used to assess reliability. Although the 2 measures of Tlim were moderately related (ICC = 0.78; p < 0.01), Tlim from the second session (545.2 ± 103.1 seconds) was significantly higher than that of the first (492.5 ± 100.9 seconds; p = 0.02). Moderate to high reliability (ICC = 0.76-0.93) for the amplitudes of the VO2 kinetics responses was found. Poor reliability, however, was found for time constants and time delays of the VO2 kinetics responses. Thus, in nonfamiliarized individuals, Tlim shows a relatively low within-subject coefficient of variation. However, the second score in a series of 2 Tlim tests may be significantly greater than the first. We have also demonstrated that the amplitudes of the V[Combining Dot Above]O2 response have significantly moderate to high reliability. The time-based parameters, however, present an important day-to-day intraindividual variation. Therefore, several transitions are recommended to monitoring changes in an individual over any time frame.

show abstract

Section: Discussioncontrasting

confidence: 67%

Reliability of Cardiorespiratory Parameters During Cycling Exercise Performed at the Severe Domain in Active Individuals

Barbosa

Montagnana²,

Denadai³

et al. 2014

Journal of Strength and Conditioning Research

View full text Add to dashboard Cite

show abstract

The highest intensity and the shortest duration permitting attainment of maximal oxygen uptake during cycling: effects of different methods and aerobic fitness level

Caputo

Denadai

2008

Eur J Appl Physiol

View full text Add to dashboard Cite

The aims of this study were: (1) to verify the validity of previous proposed models to estimate the lowest exercise duration (TLOW) and the highest intensity (IHIGH) at which VO2max is reached (2) to test the hypothesis that parameters involved in these models, and hence the validity of these models are affected by aerobic training status. Thirteen cyclists (EC), eleven runners (ER) and ten untrained (U) subjects performed several cycle-ergometer exercise tests to fatigue in order to determine and estimate TLOW (ETLOW) and I HIGH (EIHIGH). The relationship between the time to achieved VO2max and time to exhaustion (Tlim) was used to estimate ETLOW. EIHIGH was estimated using the critical power model. IHIGH was assumed as the highest intensity at which VO2 was equal or higher than the average of VO2max values minus one typical error. TLOW was considered Tlim associated with IHIGH. No differences were found in TLOW between ER (170 +/- 31 s) and U (209 +/- 29 s), however, both showed higher values than EC (117 +/- 29 s). IHIGH was similar between U (269 +/- 73 W) and ER (319 +/- 50 W), and both were lower than EC (451 +/- 33 W). EI HIGH was similar and significantly correlated with IHIGH only in U (r = 0.87) and ER (r = 0.62). ETLOW and TLOW were different only for U and not significantly correlated in all groups. These data suggest that the aerobic training status affects the validity of the proposed models for estimating IHIGH.

show abstract

Derivation of physiological inhalation rates in children, adults, and elderly based on nighttime and daytime respiratory parameters

Brochu

Brodeur

Krishnan

2011

Inhalation Toxicology

View full text Add to dashboard Cite

The methodology developed in our previous studies ( Brochu et al. 2006a-c ) for the determination of physiological daily inhalation rates was improved by integrating into the calculation process, both nighttime and daytime respiratory parameters, namely oxygen uptake factors (H) and ventilatory equivalents (VQ). H values during fasting (0.2057±0.0018 L of O2/kcal; mean±SD) and postprandial phases (0.2059±0.0019 L of O2/kcal) as well as VQ values for subjects at rest (27.4±4.8 to 32.2±3.1, unitless) and during the aggregate daytime activities (29.9±4.2 to 33.7±7.2) were determined and combined with published doubly labeled water measurements for the calculation of daily inhalation rates in normal-weight males and females aged 0.22-96 years (n=1235). Depending upon the unit value chosen, the highest 99th percentiles for inhalation data were found in males aged 35 to <45 years (35.40 m3/day), 2.6 to <6 months (1.138 m3/kg-day), and 10 to <16.5 years (22.29 m3/m2-day). Means and percentiles expressed in m3/kg-day as well as in m3/m2-day suggest generally higher intakes of air pollutants in children than in adults and in males than in females (in g/kg-day or g/m2-day) for identical exposure concentrations and conditions. For instance, means in boys aged 2.6 to <6 months of 10.99±3.50 m3/m2-day and 0.572±0.191 m3/kg-day are 1.3- and 2.5-folds higher, respectively, than those in adult males 65?96 years old (8.42±2.13 m3/m2-day, 0.225±0.059 m3/kg-day).

show abstract

Adaptation of Pulmonary Oxygen Consumption Slow Component Following 6 Weeks of Exercise Training Above and Below the Lactate Threshold in Untrained Men

Cited by 3 publications

References 21 publications

Reliability of Cardiorespiratory Parameters During Cycling Exercise Performed at the Severe Domain in Active Individuals

Reliability of Cardiorespiratory Parameters During Cycling Exercise Performed at the Severe Domain in Active Individuals

The highest intensity and the shortest duration permitting attainment of maximal oxygen uptake during cycling: effects of different methods and aerobic fitness level

Derivation of physiological inhalation rates in children, adults, and elderly based on nighttime and daytime respiratory parameters

Contact Info

Product

Resources

About