Ventilatory anaerobic threshold in healthy children

Reybrouck, Tony; Weymans, M.; Stijns, Hugo; Knops, Jacquelina; Hauwaert, L Van der

doi:10.1007/bf00426145

Cited by 110 publications

(57 citation statements)

References 19 publications

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“…[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Among all included trials, 12 studies (60%) used the Tanner-Whitehouse evaluation scale to analyze children's maturation. 20 One study chose the Weber method, 21 whereas one identified the sample as pre-menarchal and therefore this analysis considered the population as prepubertal. 23 The remaining 7 trials provided no evaluation of maturation, as shown in 1.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

A meta-analysis of cardiopulmonary exercise testing in pre-pubertal healthy children produces new information

Tavares¹,

Bocchi²,

Neto³

et al. 2016

Medical Express

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The objective of the paper was to analyze cardiopulmonary data and functional capacity in healthy children who have undergone ergospirometry. A systematic meta-analysis review of ergospirometry in children was performed based on reports indexed in PubMed, Bireme, and Embase. End points were age, sex, body mass index, maturation evaluation, the type of ergometer used for ergospirometry, and cardiopulmonary related values (peak heart rate and peak oxygen consumption [VO 2 ]). Twenty articles were selected, which included 3,808 children, averaging 9.1years of age. A treadmill was used in 55% of the trials, and a cycle ergometer in the other 45% studies included in this analysis. The following statistically significant results were found: on subgroup analysis, peak VO 2 values in boys on the treadmill was 20% higher than peak VO 2 values in girls on the cycle ergometer; peak VO 2 values in boys on the treadmill were 18% greater than that for girls on the same ergometer. BMI was inversely correlated with peak VO 2 in the total analysis, and in female subjects on cycle ergometers. Peak heart rate during the ergospirometrical test was 5.6 BPM higher than the estimated 95% maximum heart rate. Most of the ergospirometrical parameters had not been reported in the original trials analyzed here. We conclude that peak VO 2 value for pre-pubertal children are circa 18% higher in boys vs. girls and overall higher in treadmill vs. cycle ergometers.

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Section: ■ Results and Discussionmentioning

confidence: 99%

A meta-analysis of cardiopulmonary exercise testing in pre-pubertal healthy children produces new information

Tavares¹,

Bocchi²,

Neto³

et al. 2016

Medical Express

View full text Add to dashboard Cite

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“…Ventilatory threshold was determined from maximal exercise stress tests using two criteria: (1) the point where ventilation (V : E ) increased disproportionately relative to V : O 2 [23]; and (2) the point of dislinear rise in carbon dioxide production (V : O 2 peak ) relative to V : O 2 (V-slope method) [24]. These techniques have been shown to be sensitive and non-invasive measures for evaluating cardiorespiratory performance [23,25] and…”

Section: Outcomes and Measurementsmentioning

confidence: 99%

Associations between physical fitness and HbA1c in type 2 diabetes mellitus

et al. 2010

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Aim/hypothesis In people with type 2 diabetes, exercise improves glucose control (as reflected in HbA 1c ) and physical fitness, but it is not clear to what extent these exercise-induced improvements are correlated with one another. We hypothesised that reductions in HbA 1c would be related: (1) to increases in aerobic fitness and strength respectively in patients performing aerobic training or resistance training; and (2) to changes in strength and aerobic fitness in patients performing aerobic and resistance training. Methods We randomly allocated 251 type 2 diabetes patients to aerobic, resistance, or aerobic plus resistance training, or to a sedentary control group. Peak oxygen consumption (V : O 2peak ), workload, treadmill time and ventilatory threshold measurements from maximal treadmill exercise testing were measured at baseline and 6 months.Muscular strength was measured as the maximum weight that could be lifted eight times on the leg press, bench press and seated row exercises. Results With aerobic training, significant associations were found between changes in both V : O 2peak (p=0.040) and workload (p=0.022), and changes in HbA 1c. With combined training, improvements in V : O 2peak (p = 0.008), workload (p=0.034) and ventilatory threshold (p=0.003) were significantly associated with changes in HbA 1c. Increases in strength on the seated row (p=0.006) and in mid-thigh muscle cross-sectional area (p=0.030) were significantly associated with changes in HbA 1c after resistance exercise, whereas the association between increases in muscle cross-sectional area and HbA 1c in participants doing aerobic plus resistance exercise (p= 0.059) was of borderline significance. Conclusions/interpretation There appears to be a link between changes in fitness and HbA 1c . The improvements in cardiorespiratory fitness with aerobic training may be a better predictor of changes in HbA 1c than improvements in strength.

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“…O LAV, por sua vez, é considerado um marcador confiável de aptidão aeró-bica submáxima devido à sua capacidade de ser sustentado por um longo período de tempo e de sua sensibilidade ao descondicionamento aeróbico e sedentarismo (WASSERMAN et al, 1999) e, por esse motivo, também tem sido bastante estudado (REYBROUCk et al, 1985;ZANCONATO et al, 1989;PEREZ;CARLETTI, 2012). Bar-Or (1983, p. 15) sugere ainda que entre pré-púberes, o LAV pode refletir melhor condicionamento relacionado às melhorias na potência aeróbica máxima do que o VO 2 máx.…”

Section: Introductionunclassified

“…Valores normais de respostas cardiorrespiratórias ao exercício máximo para crianças e adolescentes já foram amplamente publicados (CUNNINGhAM et al, 1984;REYBROUCk et al, 1985;ZANCONATO et al, 1989;WAShINGTON et al, 1988;ROWLAND;CUNNINGhAM, 1992CUNNINGhAM, , 1997AL-hAZZAA, 2001;MANDADZhIEVA et al, 2005;RODRIGUES et al, 2006;SILVA;SARAIVA;SOBRAL, 2007). Contudo, alguns desses estudos apontam também valores para o LAV, que podem ser mencionados como referências, baseados em amostras internacionais, para avaliar o nível de resistência cardiorrespiratória de crianças e adolescentes no exercício submáximo (REYBROUCk et al, 1985;ZANCONATO et al, 1989;AL-hAZZAA, 2001).…”

Section: Introductionunclassified