TY - JOUR
T1 - Fitness effects of 10-month frequent low-volume ball game training or interval running for 8-10-year-old school children
AU - Larsen, Malte Nejst
AU - Nielsen, Claus Malta
AU - Ørntoft, Christina Øyangen
AU - Randers, Morten Bredsgaard
AU - Helge, Eva Wulff
AU - Madsen, Mads
AU - Manniche, Vibeke
AU - Hansen, Lone
AU - Hansen, Peter Riis
AU - Bangsbo, Jens
AU - Krustrup, Peter
N1 - CURIS 2017 NEXS 094
PY - 2017
Y1 - 2017
N2 - We investigated the exercise intensity and fitness effects of frequent school-based low-volume high-intensity training for 10 months in 8-10-year-old children. 239 Danish 3rd-grade school children from four schools were cluster-randomised into a control group (CON, n = 116) or two training groups performing either 5×12 min/wk small-sided football plus other ball games (SSG, n = 62) or interval running (IR,n = 61).Whole-body DXA scans, flamingo balance, standing long-jump, 20msprint, and Yo-Yo IR1 children's tests (YYIR1C) were performed before and after the intervention. Mean running velocity was higher (P < 0.05) in SSG than in IR (0.88 ± 0.14 versus 0.63 ± 0.20 m/s), while more time (P < 0.05) was spent in the highest player load zone (>2; 5.6 ± 3.4 versus 3.7±3.4%) and highest HR zone (>90% HRmax; 12.4±8.9 versus 8.4±8.0%) in IR compared to SSG. After 10months, no significant between-group differences were observed for YYIR1C performance and HR after 2 min of YYIR1C (HRsubmax), but median-split analyses showed that HRsubmax was reduced (P < 0.05) in both training groups compared to CON for those with the lowest aerobic fitness (SSG versus CON: 3.2% HRmax [95% CI: 0.8-5.5]; IR versus CON: 2.6% HRmax [95% CI: 1.1-5.2]). After 10 months, IR had improved (P < 0.05) 20msprint performance (IR versus CON: 154ms [95% CI: 61-241]). No between-group differences (P > 0.05) were observed for whole-body or leg a BMD, lean mass, postural balance, or jump length. In conclusion, frequent low-volume ball games and interval running can be conducted over a full school year with high intensity rate but has limited positive fitness effects in 8-10-year-old children.
AB - We investigated the exercise intensity and fitness effects of frequent school-based low-volume high-intensity training for 10 months in 8-10-year-old children. 239 Danish 3rd-grade school children from four schools were cluster-randomised into a control group (CON, n = 116) or two training groups performing either 5×12 min/wk small-sided football plus other ball games (SSG, n = 62) or interval running (IR,n = 61).Whole-body DXA scans, flamingo balance, standing long-jump, 20msprint, and Yo-Yo IR1 children's tests (YYIR1C) were performed before and after the intervention. Mean running velocity was higher (P < 0.05) in SSG than in IR (0.88 ± 0.14 versus 0.63 ± 0.20 m/s), while more time (P < 0.05) was spent in the highest player load zone (>2; 5.6 ± 3.4 versus 3.7±3.4%) and highest HR zone (>90% HRmax; 12.4±8.9 versus 8.4±8.0%) in IR compared to SSG. After 10months, no significant between-group differences were observed for YYIR1C performance and HR after 2 min of YYIR1C (HRsubmax), but median-split analyses showed that HRsubmax was reduced (P < 0.05) in both training groups compared to CON for those with the lowest aerobic fitness (SSG versus CON: 3.2% HRmax [95% CI: 0.8-5.5]; IR versus CON: 2.6% HRmax [95% CI: 1.1-5.2]). After 10 months, IR had improved (P < 0.05) 20msprint performance (IR versus CON: 154ms [95% CI: 61-241]). No between-group differences (P > 0.05) were observed for whole-body or leg a BMD, lean mass, postural balance, or jump length. In conclusion, frequent low-volume ball games and interval running can be conducted over a full school year with high intensity rate but has limited positive fitness effects in 8-10-year-old children.
KW - Journal Article
U2 - 10.1155/2017/2719752
DO - 10.1155/2017/2719752
M3 - Journal article
C2 - 28303248
SN - 2314-6133
VL - 2017
JO - BioMed Research International
JF - BioMed Research International
M1 - 2719752
ER -