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The Effect of Training Intensity on VO2max in Young Healthy Adults: A Meta-Regression and Meta-Analysis.

Scribbans TD, Vecsey S, Hankinson PB, Foster WS, Gurd BJ - Int J Exerc Sci (2016)

Bottom Line: These studies were also divided into 3 tertiles based on intensity (tertile 1: ~60-70%; 2: ~80-92.5%; 3: ~100-250%VO2max), for comparison using separate meta-analyses.The fixed and random effects meta-regression models examining training intensity, session dose, baseline VO2max and total training volume was non-significant (Q4=1.36; p=0.85; R(2)=0.05).There was no significant difference between tertiles in mean change in VO2max (tertile 1:+0.29±0.15 l/min, ES (effect size) =0.77; 2:+0.26±0.10 l/min, ES=0.68; 3:+0.35±0.17 l/min, ES=0.80), despite significant (p<0.05) reductions in session dose and total training volume as training intensity increased.

View Article: PubMed Central - PubMed

Affiliation: School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada.

ABSTRACT

Exercise training at a variety of intensities increases maximal oxygen uptake (VO2max), the strongest predictor of cardiovascular and all-cause mortality. The purpose of the present study was to perform a systematic review, meta-regression and meta-analysis of available literature to determine if a dose-response relationship exists between exercise intensity and training-induced increases in VO2max in young healthy adults. Twenty-eight studies involving human participants (Mean age: 23±1 yr; Mean VO2max: 3.4±0.8 l·min(-1)) were included in the meta-regression with exercise training intensity, session dose, baseline VO2max, and total training volume used as covariates. These studies were also divided into 3 tertiles based on intensity (tertile 1: ~60-70%; 2: ~80-92.5%; 3: ~100-250%VO2max), for comparison using separate meta-analyses. The fixed and random effects meta-regression models examining training intensity, session dose, baseline VO2max and total training volume was non-significant (Q4=1.36; p=0.85; R(2)=0.05). There was no significant difference between tertiles in mean change in VO2max (tertile 1:+0.29±0.15 l/min, ES (effect size) =0.77; 2:+0.26±0.10 l/min, ES=0.68; 3:+0.35±0.17 l/min, ES=0.80), despite significant (p<0.05) reductions in session dose and total training volume as training intensity increased. These data suggest that exercise training intensity has no effect on the magnitude of training-induced increases in maximal oxygen uptake in young healthy human participants, but similar adaptations can be achieved in low training doses at higher exercise intensities than higher training doses of lower intensity (endurance training).

No MeSH data available.


Weighted change in VO2max and population effects for each tertile. (A) Weighted mean change and pooled SEM in absolute oxygen consumption (VO2max) for each tertile (Tertile 1: 60–70% of VO2max; 2: 80–92.5% of VO2max; 3: 100–250% of VO2max). (B) Forest plot of population effects for each tertile with 95% CI’s. Note: CI, credibility interval; l, liters; min, minutes; SEM, standard error of measurement.
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f4-ijes_09_02_230: Weighted change in VO2max and population effects for each tertile. (A) Weighted mean change and pooled SEM in absolute oxygen consumption (VO2max) for each tertile (Tertile 1: 60–70% of VO2max; 2: 80–92.5% of VO2max; 3: 100–250% of VO2max). (B) Forest plot of population effects for each tertile with 95% CI’s. Note: CI, credibility interval; l, liters; min, minutes; SEM, standard error of measurement.

Mentions: One-way ANOVA’s on baseline (Table 4) and weighted change scores for absolute VO2max (Fig. 4A) demonstrated no significant difference between tertiles. The weighted mean change of VO2max was 0.30 l/min (95% CI: −0.52 to 1.12 l/min) with population effects for each tertile (Fig. 4B) corresponding to a moderate-large effect of training (9). A two-way ANOVA demonstrated a main effect of training (p<0.05) for absolute VO2max (Table 4). Session dose was significantly (p<0.05) lower in tertile 3 than tertile 1, while total training volume was significantly (p<0.05) lower in tertile 2 and 3 compared to tertile 1 (Table 3).


The Effect of Training Intensity on VO2max in Young Healthy Adults: A Meta-Regression and Meta-Analysis.

Scribbans TD, Vecsey S, Hankinson PB, Foster WS, Gurd BJ - Int J Exerc Sci (2016)

Weighted change in VO2max and population effects for each tertile. (A) Weighted mean change and pooled SEM in absolute oxygen consumption (VO2max) for each tertile (Tertile 1: 60–70% of VO2max; 2: 80–92.5% of VO2max; 3: 100–250% of VO2max). (B) Forest plot of population effects for each tertile with 95% CI’s. Note: CI, credibility interval; l, liters; min, minutes; SEM, standard error of measurement.
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Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4836566&req=5

f4-ijes_09_02_230: Weighted change in VO2max and population effects for each tertile. (A) Weighted mean change and pooled SEM in absolute oxygen consumption (VO2max) for each tertile (Tertile 1: 60–70% of VO2max; 2: 80–92.5% of VO2max; 3: 100–250% of VO2max). (B) Forest plot of population effects for each tertile with 95% CI’s. Note: CI, credibility interval; l, liters; min, minutes; SEM, standard error of measurement.
Mentions: One-way ANOVA’s on baseline (Table 4) and weighted change scores for absolute VO2max (Fig. 4A) demonstrated no significant difference between tertiles. The weighted mean change of VO2max was 0.30 l/min (95% CI: −0.52 to 1.12 l/min) with population effects for each tertile (Fig. 4B) corresponding to a moderate-large effect of training (9). A two-way ANOVA demonstrated a main effect of training (p<0.05) for absolute VO2max (Table 4). Session dose was significantly (p<0.05) lower in tertile 3 than tertile 1, while total training volume was significantly (p<0.05) lower in tertile 2 and 3 compared to tertile 1 (Table 3).

Bottom Line: These studies were also divided into 3 tertiles based on intensity (tertile 1: ~60-70%; 2: ~80-92.5%; 3: ~100-250%VO2max), for comparison using separate meta-analyses.The fixed and random effects meta-regression models examining training intensity, session dose, baseline VO2max and total training volume was non-significant (Q4=1.36; p=0.85; R(2)=0.05).There was no significant difference between tertiles in mean change in VO2max (tertile 1:+0.29±0.15 l/min, ES (effect size) =0.77; 2:+0.26±0.10 l/min, ES=0.68; 3:+0.35±0.17 l/min, ES=0.80), despite significant (p<0.05) reductions in session dose and total training volume as training intensity increased.

View Article: PubMed Central - PubMed

Affiliation: School of Kinesiology and Health Studies, Queen's University, Kingston, Ontario, Canada.

ABSTRACT

Exercise training at a variety of intensities increases maximal oxygen uptake (VO2max), the strongest predictor of cardiovascular and all-cause mortality. The purpose of the present study was to perform a systematic review, meta-regression and meta-analysis of available literature to determine if a dose-response relationship exists between exercise intensity and training-induced increases in VO2max in young healthy adults. Twenty-eight studies involving human participants (Mean age: 23±1 yr; Mean VO2max: 3.4±0.8 l·min(-1)) were included in the meta-regression with exercise training intensity, session dose, baseline VO2max, and total training volume used as covariates. These studies were also divided into 3 tertiles based on intensity (tertile 1: ~60-70%; 2: ~80-92.5%; 3: ~100-250%VO2max), for comparison using separate meta-analyses. The fixed and random effects meta-regression models examining training intensity, session dose, baseline VO2max and total training volume was non-significant (Q4=1.36; p=0.85; R(2)=0.05). There was no significant difference between tertiles in mean change in VO2max (tertile 1:+0.29±0.15 l/min, ES (effect size) =0.77; 2:+0.26±0.10 l/min, ES=0.68; 3:+0.35±0.17 l/min, ES=0.80), despite significant (p<0.05) reductions in session dose and total training volume as training intensity increased. These data suggest that exercise training intensity has no effect on the magnitude of training-induced increases in maximal oxygen uptake in young healthy human participants, but similar adaptations can be achieved in low training doses at higher exercise intensities than higher training doses of lower intensity (endurance training).

No MeSH data available.