Central and peripheral cardiovascular adaptations during a maximal cycle exercise in boys and men

Nottin, Stéphane; Vinet, Agnès; Stecken, F; Nguyen, Long-Dang; Ounissi, F.; Lecoq, A.-M.; Obert, Philippe

doi:10.1097/00005768-200203000-00012

Cited by 36 publications

(27 citation statements)

References 29 publications

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“…Equation 8 suggests, however, that if the max-to-rest ratios of SV and (CaO 2 )C" vO 2 ) were approximately constant across individuals, _ V O 2max per kg BM may be estimated by experimentally determining the HR max -to-HR rest ratio, and multiplying this ratio with these constants and 3.4 mlAEmin )1 AEkg )1 . Nottin et al (2002) and Chapman et al (1960) reported the average SV max AESV rest )1 to be 1.28 and 1.29, respectively, in men, when measured in the supine position. Thus, according to the studies mentioned it appears that SV max AESV rest )1 may be replaced by a dimensionless value of approximately 1.3.…”

Section: Resultsmentioning

confidence: 99%

Estimation of V?O2max from the ratio between HRmax and HRrest ? the Heart Rate Ratio Method

et al. 2003

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The effects of training and/or ageing upon maximal oxygen uptake ( VO(2max)) and heart rate values at rest (HR(rest)) and maximal exercise (HR(max)), respectively, suggest a relationship between VO(2max) and the HR(max)-to-HR(rest) ratio which may be of use for indirect testing of VO(2max). Fick principle calculations supplemented by literature data on maximum-to-rest ratios for stroke volume and the arterio-venous O(2) difference suggest that the conversion factor between mass-specific VO(2max) (ml.min(-1).kg(-1)) and HR(max).HR(rest)(-1) is approximately 15. In the study we experimentally examined this relationship and evaluated its potential for prediction of VO(2max). VO(2max) was measured in 46 well-trained men (age 21-51 years) during a treadmill protocol. A subgroup ( n=10) demonstrated that the proportionality factor between HR(max).HR(rest)(-1) and mass-specific VO(2max) was 15.3 (0.7) ml.min(-1).kg(-1). Using this value, VO(2max) in the remaining 36 individuals could be estimated with an SEE of 0.21 l.min(-1) or 2.7 ml.min(-1).kg(-1) (approximately 4.5%). This compares favourably with other common indirect tests. When replacing measured HR(max) with an age-predicted one, SEE was 0.37 l.min(-1) and 4.7 ml.min(-1).kg(-1) (approximately 7.8%), which is still comparable with other indirect tests. We conclude that the HR(max)-to-HR(rest) ratio may provide a tool for estimation of VO(2max) in well-trained men. The applicability of the test principle in relation to other groups will have to await direct validation. VO(2max) can be estimated indirectly from the measured HR(max)-to-HR(rest) ratio with an accuracy that compares favourably with that of other common indirect tests. The results also suggest that the test may be of use for VO(2max) estimation based on resting measurements alone.

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Section: Resultsmentioning

confidence: 99%

Estimation of V?O2max from the ratio between HRmax and HRrest ? the Heart Rate Ratio Method

et al. 2003

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“…The stroke volume, i.e., the quantity of blood ejected from the left ventricle during a systole, shows curvilinear kinetics in children during progressive physical exercise 3,9,17,18 , which is the same behavior seen in adults 19,20 . In an important study using Doppler and bidimensional echocardiography, Rowland et al 17 , attributed this curvilinear profile (plateau) to several mechanisms.…”

Section: Stroke Volumementioning

confidence: 73%

“…According to the authors, 18 the main finding of this investigation was the fact that children and adults use similar mechanisms for SV adaptation in face of progressive physical exercise. In spite of similar SV kinetics between children and adults, the pediatric population shows an attenuated inotropic response, and consequently, lower resting and exercise (submaximal or maximal) values for SV in comparison to those observed in their adult congeners 2,3,8,9 ( Fig.…”

Section: Stroke Volumementioning

confidence: 88%

“…For Nottin et al 18 , however, the curvilinear behavior observed in children is due to a combination of the pre-load, after load, and myocardial contractility. According to the authors, 18 the main finding of this investigation was the fact that children and adults use similar mechanisms for SV adaptation in face of progressive physical exercise.…”

Section: Stroke Volumementioning

confidence: 94%

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Comportamento das variáveis cardiovasculares, ventilatórias e metabólicas durante o exercício: diferenças entre crianças e adultos

Prado

Dias²,

Trombetta³

2006

Arq. Bras. Cardiol.

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“…This increase may be related to adaptations in the cardiovascular control sites such as hypothalamus, nucleus tractus solitarius (NTS), and rostral-ventrolateral medulla (RVLM) and these adaptations seem to occur by means of both neural remodeling and endogens factors such as nitric oxide [33][34][35][36]. In this sense, these central adaptations would improve the regulation of sympathetic and parasympathetic autonomic influences on the heart; however we cannot exclude the fact that physical exercise can also promote intrinsic cardiac adaptations, thus contributing to a better autonomic influence on HRV [35][36][37].…”

Section: Parametersmentioning

confidence: 99%

Effects of Physical Training on Cardiac Modulation in Normal Weight, Overweight, and Obese Individuals: A Comparative Study

Hrds

Ac²,

Cc³

et al. 2015

J Nutr Food Sci

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Our study has assessed the effect of aerobic physical training on the heart rate variability (HRV) on sedentary women with different body mass indices (BMI; weight/height 2 ). Forty-eight volunteers were divided into three groups according to their BMI as follows: NW group (normal weight), 18.0-24.9; OW group (overweight), 25.0-29.9; and OB group (obese), 30.0-39.9. HRV was assessed with the subjects at rest and during tilt test by means of spectral analysis before and after 16 weeks of an aerobic physical training protocol.Prior to the aerobic physical training, OW and OB groups exhibited decrease in low frequency (LF, 0.4-0.15 Hz) and high frequency (HF, 0.15-0.5 Hz). After aerobic physical training all groups had similar HF oscillations, with only OB group exhibiting increase in LF oscillations. The HRV responses to tilt test obtained before and after aerobic physical training showed that NW group had no differences in LF (34 ± 6% vs. 36 ± 8%) and HF (-65 ± 6% vs. -60 ± 7%) oscillations. However, OW group had an increase in LF (46 ± 6% vs. 86 ± 14%) and HF (-44 ± 7% vs.-61 ± 7%) oscillations, whereas OB group had a decrease in LF (288 ± 25% vs. 159 ± 16%) and HF (-83 ± 5 vs. -70 ± 4%) oscillations.In conclusion, our results suggest that the increase in the percentage of body fat may impair the cardiac autonomic modulation in proportion to BMI, which is an important predictor of cardiovascular morbidity and mortality. In turn, the physical exercise can attenuate this negative effect, regardless of the reduction of body fat mass.

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Central and peripheral cardiovascular adaptations during a maximal cycle exercise in boys and men

Abstract: The patterns of stroke volume, as well as its underlying mechanisms, were not age-related during an upright maximal exercise test. However, other studies are required to understand further the effect of pubertal status on the peripheral cardiovascular system.

Cited by 36 publications

References 29 publications

Estimation of V?O2max from the ratio between HRmax and HRrest ? the Heart Rate Ratio Method

Estimation of V?O2max from the ratio between HRmax and HRrest ? the Heart Rate Ratio Method

Comportamento das variáveis cardiovasculares, ventilatórias e metabólicas durante o exercício: diferenças entre crianças e adultos

Effects of Physical Training on Cardiac Modulation in Normal Weight, Overweight, and Obese Individuals: A Comparative Study

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