24 research outputs found

    Fitness effects of 10-month frequent low-volume ball game training or interval running for 8-10-year-old school children

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    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, 20 m sprint, 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 10 months, 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) 20 m sprint performance (IR versus CON: 154 ms [95% CI: 61–241]). No between-group differences (p>0.05) were observed for whole-body or leg aBMD, 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

    Clinical Study Fitness Effects of 10-Month Frequent Low-Volume Ball Game Training or Interval Running for 8-10-Year-Old School Children

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    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, = 116) or two training groups performing either 5×12 min/wk small-sided football plus other ball games (SSG, = 62) or interval running (IR, = 61). Whole-body DXA scans, flamingo balance, standing long-jump, 20 m sprint, and Yo-Yo IR1 children&apos;s tests (YYIR1C) were performed before and after the intervention. Mean running velocity was higher ( &lt; 0.05) in SSG than in IR (0.88 ± 0.14 versus 0.63 ± 0.20 m/s), while more time ( &lt; 0.05) was spent in the highest player load zone (&gt;2; 5.6 ± 3.4 versus 3.7 ± 3.4%) and highest HR zone (&gt;90% HR max ; 12.4 ± 8.9 versus 8.4 ± 8.0%) in IR compared to SSG. After 10 months, no significant between-group differences were observed for YYIR1C performance and HR after 2 min of YYIR1C (HR submax ), but median-split analyses showed that HR submax was reduced ( &lt; 0.05) in both training groups compared to CON for those with the lowest aerobic fitness (SSG versus CON: 3.2% HR max [95% CI: 0.8-5.5]; IR versus CON: 2.6% HR max [95% CI: 1.1-5.2]). After 10 months, IR had improved ( &lt; 0.05) 20 m sprint performance . No between-group differences ( &gt; 0.05) were observed for whole-body or leg aBMD, 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

    'FIFA 11 for Health' for Europe. II::Effect on health markers and physical fitness in Danish schoolchildren aged 10-12 years

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    OBJECTIVES: To evaluate whether a modified ‘FIFA 11 for Health’ programme for non-communicable diseases had effects on body composition, blood pressure and physical fitness of Danish schoolchildren aged 10–12 years. DESIGN: A cluster-randomised controlled study with 7 intervention and 2 control schools. PARTICIPANTS: 546 Danish 5th grade municipal schoolchildren allocated to an intervention group (IG; n=402: 11.1±0.4 (±SD) years, 150.1±7.0 cm, 41.3±8.4 kg) and a control group (CG; n=144: 11.0±0.5 years, 151.2±7.8 cm, 41.3±9.0 kg). INTERVENTION: As part of the physical education (PE) curriculum, IG carried out 2 weekly 45 min ‘FIFA 11 for Health’ sessions focusing on health issues, football skills and 3v3 games. CG continued regular school PE activities. Measurements of body composition, blood pressure at rest, Yo-Yo intermittent recovery level 1 children's test (YYIR1C), balance, jump and sprint performance were performed before and after the 11-week study period. RESULTS: During the 11-week study period, systolic blood pressure (−3.5 vs 0.9 mm Hg), mean arterial blood pressure (−1.9 vs 0.4 mm Hg), body mass index (−0.02 vs 0.13 kg/m(2)) and body fat percentage (−0.83% vs −0.04%) decreased more (p<0.05) in IG than in CG. Within-group improvements (p<0.05) were observed in IG for 20 m sprint (4.09±0.29 to 4.06±0.28 s) and YYIR1C performance (852±464 to 896±517 m), but these changes were not significantly different from CG, and balance or jump performance remained unchanged in both groups. CONCLUSIONS: The modified ‘FIFA 11 for Health’ programme has beneficial effects on body composition and blood pressure for Danish schoolchildren aged 10–12 years, thereby providing evidence that this football-based health education programme can directly impact participants' cardiovascular health profile

    ‘FIFA 11 for Health’ for Europe. II: effect on health markers and physical fitness in Danish schoolchildren aged 10–12 years

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    Er is een verkennend booronderzoek uitgevoerd in het plangebied. Tijdens het booronderzoek is een bodemopbouw bestaande uit esdek op terrasafzettingen. In een van de boringen is een laag dekzand aangetroffen op de terrasafzettingen. De bodem is deels vestoord, tot 0,2 – 1,55 m beneden maaiveld (31,05 – 32,6 m +NAP). Het dekzand is waarschijnlijk opgenomen in het esdek of de bovenliggende verstoring. Er zijn geen aanwijzingen voor de aanwezigheid van een podzolprofiel in de top van de terrasafzettingen waargenomen. Vermoedelijk is de oorspronkelijke podzolbodem opgenomen in het esdek. Het aantreffen van een esdek bevestigt het gebruik van het plangebied als landbouwgrond vanaf in ieder geval de Nieuwe tijd, en mogelijk al vanaf de Late Middeleeuwen. Er zijn bij het booronderzoek geen archeologische indicatoren aangetroffen. Toch kan de aanwezigheid van een archeologische vindplaats op basis van de boringen niet worden uitgesloten. De aanwezigheid van het esdek kan ervoor gezorgd hebben dat een eventueel sporenniveau in de top van de terrasafzettingen nog intact in het plangebied aanwezig is. Ook indien de oorspronkelijke top van de afzettingen is aangetast, kunnen dieper insnijdende sporen zoals greppels of waterputten nog in de ondergrond aanwezig zijn. De in het bureauonderzoek opgestelde middelhoge archeologische verwachting voor het aantreffen van resten uit het Laat-Paleolithicum t/m de Nieuwe tijd blijft daarmee in stand

    Kicking velocity and effect on match performance when using a smaller, lighter ball in women's football

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    The present study evaluated the effect of a smaller, lighter ball on kicking speed and technical- tactical and physical match performance in high-level adult female footballers. In the laboratory test setting, the peak ball velocity was 6 % higher with the new ball (NB) than the standard ball (SB) (26.5 ± 0.5 vs. 25.1 ± 0.5 m · s − 1, p < 0.05). However, during match-play, no differences were observed in mean heart rate (87 ± 5 vs. 87 ± 5 %HRmax; p > 0.05), blood lactate (90 min: 4.7 ± 1.7 and 4.0 ± 1.7 mmol · l − 1; p > 0.05), total distance covered (10.6 ± 0.9 and 10.4 ± 0.8 km; p > 0.05), intense running ( > 16 km/h) (2.08 ± 0.42 and 1.94 ± 0.38 km; p > 0.05) and match-induced decrement in Yo-Yo IR1 performance (28 vs. 31 %, respectively, p < 0.05) using NB compared to SB. Likewise, no difference was observed in the number of short, medium-range or long passes during matches played with the 2 ball types, and there was no difference in passing success rate (NB: 68 ± 1 % and SB: 68 ± 1 %, p > 0.05). In conclusion, high-level adult female footballers had a higher kicking speed when using a smaller, lighter ball, but no differences were observed during matchplay with the 2 ball types in respect of technicaltactical and physical match performance. The physical loading was high for the players when playing with both ball types
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