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- Helge, E. W., et al.
(författare)
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Recreational football training decreases risk factors for bone fractures in untrained premenopausal women
- 2010
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Ingår i: Scandinavian Journal of Medicine & Science in Sports. - : Wiley. - 1600-0838 .- 0905-7188. ; 20:s1, s. 31-39
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Tidskriftsartikel (refereegranskat)abstract
- The present intervention was designed to investigate whether a 14-week period of regular recreational association football (F) or endurance running (R) has an effect on the risk of falls and bone fractures due to gains in muscle function and volumetric bone mineral density (vBMD). Fifty healthy untrained Danish premenopausal women were randomized into two training groups (F and R) that trained 1.8 +/- 0.3 (+/- SD) and 1.9 +/- 0.3 h/week, respectively, and these groups were compared with an inactive control group (C). Jumping and dynamic muscle strength were tested and tibial vBMD was measured using peripheral quantitative computed tomography. Total vBMD in left and right tibia increased by 2.6 +/- 2.3% and 2.1 +/- 1.8% (P < 0.005), respectively, in F and by 0.7 +/- 1.3% (P=0.05) and 1.1 +/- 1.5% (P < 0.01), respectively, in R without any significant changes in C. Similar results were found for trabecular vBMD. In F, peak jump power increased by 3 +/- 6% (P < 0.05), and hamstring strength during fast (240 degrees/s) and slow (30 degrees/s) contractions increased by 11 +/- 25% and 9 +/- 21%, respectively, (P < 0.05) without any significant changes in R or C. In conclusion, 14 weeks of regular recreational football improved peak jump power, maximal hamstring strength and vBMD in the distal tibia, suggesting a decreased fracture risk due to stronger bones and a reduced risk of falling.
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| 2. |
- Andersson, Helena M., et al.
(författare)
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Elite female soccer players perform more high-intensity running when playing in international games compared with domestic league games
- 2010
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Ingår i: Journal of Strength and Conditioning Research. - Philadelphia, USA : Lippincott Williams & Wilkins. - 1064-8011 .- 1533-4287. ; 24:4, s. 912-919
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this study was to compare movement pattern, fatigue development, and heart rate (HR) for top-class elite female players when playing international (INT) vs. domestic league games (DOM). Video-based time-motion analyses and HR recordings were performed on 17 players during INT and DOM. The distances covered in high-intensity running (HIR) and sprinting were longer (p < 0.05) in INT compared with DOM. More (p < 0.05) HIR was covered in INT than DOM during first and second half. Additionally, more (p < 0.05) sprinting occurred in INT compared with DOM in the first half. In both game types, the amount of HIR was reduced by 24-27% (p < 0.05) in the last 15-minute period compared with the first four 15-minute periods of the game. The midfielders covered longer (p < 0.05) distances with HIR in INT than in DOM over the entire game and in the most intense 5-minute period of the games, whereas no differences were observed between the game types for defenders. No difference in the HR response was found between INT and DOM. In conclusion, more HIR and sprinting occur in international compared with domestic games, which may affect the fatigue development for players in physically demanding roles. Thus, our results are important to coaches to prepare players to meet the challenges of international soccer games and show that the ability to perform intense intermittent exercise should be trained regularly in elite female players.
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