| 1. |
- Mohr, Magni, 1973, et al.
(författare)
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Football training improves cardiovascular health profile in sedentary, premenopausal hypertensive women
- 2014
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Ingår i: Scandinavian Journal of Medicine & Science in Sports. - : Wiley. - 0905-7188 .- 1600-0838. ; 24:Suppl. 1, s. 36-42
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Tidskriftsartikel (refereegranskat)abstract
- The present study examined the effects of short-term recreational football training on blood pressure (BP), fat mass, and fitness in sedentary, 35-50-year-old premenopausal women with mild hypertension. Forty-one untrained, hypertensive women were randomized into a football training group (n=21; FTG) and a control group (n=20; CON). FTG performed 45 +/- 1 1-h small-sided football training sessions during the 15-week intervention period. BP, body composition (dual-energy x-ray absorptiometry), blood lipid profile, and fitness level were determined pre- and post-intervention. After 15 weeks, systolic and diastolic BP, respectively, were lowered more (P<0.05) in FTG (-12 +/- 3 and -6 +/- 2mmHg) than in CON (-1 +/- 1 and 1 +/- 2mmHg). Total body fat mass decreased more (P<0.05) in FTG than in CON during the 15-week intervention period (-2.3 +/- 0.5kg vs 0.4 +/- 0.3kg). After 15 weeks, both total cholesterol (-0.4 +/- 0.1mmol/L vs 0.1 +/- 0.2mmol/L) and triglyceride (-0.2 +/- 0.1mmol/L vs 0.3 +/- 0.2mmol/L) were lowered more (P<0.05) in FTG than in CON. Yo-Yo intermittent endurance level 1 test performance increased more (P<0.05) in FTG than in CON (111 +/- 18% vs 1 +/- 3%) during the 15-week intervention period. In conclusion, short-term football training resulted in a marked reduction in BP and induced multiple improvements in fitness and cardiovascular health profile of untrained, premenopausal women with mild hypertension.
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| 2. |
- Mohr, Magni, 1973, et al.
(författare)
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High-Intensity intermittent swimming improves cardiovascular health status for women with mild hypertension
- 2014
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Ingår i: BioMed Research International. - : Hindawi Publishing Corporation. - 2314-6133 .- 2314-6141. ; 2014
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Tidskriftsartikel (refereegranskat)abstract
- To test the hypothesis that high-intensity swim training improves cardiovascular health status in sedentary premenopausal women with mild hypertension, sixty-two women were randomized into high-intensity (n = 21; HIT), moderate-intensity (n = 21; MOD), and control groups (n = 20; CON). HIT performed 6-10 × 30 s all-out swimming interspersed by 2 min recovery and MOD swam continuously for 1 h at moderate intensity for a 15-week period completing in total 44 ± 1 and 43 ± 1 sessions, respectively. In CON, all measured variables were similar before and after the intervention period. Systolic BP decreased (P < 0.05) by 6 ± 1 and 4 ± 1 mmHg in HIT and MOD; respectively. Resting heart rate declined (P < 0.05) by 5 ± 1 bpm both in HIT and MOD, fat mass decreased (P < 0.05) by 1.1 ± 0.2 and 2.2 ± 0.3 kg, respectively, while the blood lipid profile was unaltered. In HIT and MOD, performance improved (P < 0.05) for a maximal 10 min swim (13 ± 3 % and 22 ± 3 %), interval swimming (23 ± 3 % and 8 ± 3 %), and Yo-Yo IE1 running performance (58 ± 5 % and 45 ± 4 %). In conclusion, high-intensity intermittent swimming is an effective training strategy to improve cardiovascular health and physical performance in sedentary women with mild hypertension. Adaptations are similar with high- and moderate-intensity training, despite markedly less total time spent and distance covered in the high-intensity group. © 2014 Magni Mohr et al.
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| 3. |
- 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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| 4. |
- Bendiksen, M., et al.
(författare)
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Application of the Copenhagen Soccer Test in high-level women players - locomotor activities, physiological response and sprint performance
- 2013
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Ingår i: Human Movement Science. - : Elsevier BV. - 0167-9457. ; 32:6, s. 1430-1442
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Tidskriftsartikel (refereegranskat)abstract
- We evaluated the physiological response, sprint performance and technical ability in various phases of the Copenhagen Soccer Test for Women (CSTw.) and investigated whether the locomotor activities of the CSTw were comparable to competitive match-play (CM). Physiological measurements and physical/technical assessments were performed during CSTw for eleven Norwegian high-level women soccer players. The activity pattern during CSTw and CM was monitored using the ZXY tracking system. No differences were observed between CSTw and CM with regards to total distance covered (10093 +/- 94 and 9674 +/- 191 m), high intensity running (1278 +/- 67 and 1193 +/- 115 m) or sprinting (422 +/- 55 and 372 +/- 46 m) (p > .05). During CSTw, average HR was 85 +/- 2%HRmax with 35 +/- 2% playing time >90%HRmax. Blood lactate increased (p < .05) from 1.4 +/- 0.3 mM at rest to an average of 4.7 +/- 0.5 mM during CSTw, with no changes during the test. Blood glucose was 5.4 +/- 0.3 mM at rest and remained unaltered during CSTw. Sprint performance (2 x 20 in) decreased (p < .05) by 3% during CSTw (8.19 +/- 0.06-8.47 +/- 0.10 s). In conclusion, the locomotor activities during CSTw were comparable to that of high-level competitive match-play. The physiological demands of the CSTw were high, with no changes in heart rate, blood lactate or technical performance during the test, but a lowered sprint performance towards the end of the test. (C) 2013 Elsevier B.V. All rights reserved.
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| 5. |
- Connolly, L. J., et al.
(författare)
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Effects of small-volume soccer and vibration training on body composition, aerobic fitness, and muscular PCr kinetics for inactive women aged 20-45
- 2014
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Ingår i: Journal of Sport and Health Science. - : Elsevier BV. - 2095-2546. ; 3:4, s. 284-292
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The present study investigated the effects of 16 weeks of small-volume, small-sided soccer training soccer group (SG, n = 13) and oscillating whole-body vibration training vibration group (VG, n = 17) on body composition, aerobic fitness, and muscle PCr kinetics in healthy inactive premenopausal women in comparison with an inactive control group (CO, n = 14). Methods: Training for SG and VG consisted of twice-weekly 15-min sessions with average heart rates (HRs) of similar to 155 and 90 bpm respectively. Pre- and post-measurements of body composition (DXA), phosphocreatine (PCr) on-and off-kinetics, and HR measurements during standardised submaximal exercise were performed. Results: After 16 weeks of training in SG, fat percentage was lowered (p = 0.03) by 1.7% +/- 2.4% from 37.5% +/- 6.9% to 35.8% +/- 6.2% and the PCr decrease in the quadriceps during knee-extension ramp exercise was attenuated (4% +/- 8%, p = 0.04), with no changes in VG or CO (time-group effect: p = 0.03 and p = 0.03). Submaximal exercise HR was also reduced in SG after 16 weeks of training (6% +/- 5% of HRmax, p = 0.01). Conclusion: Short duration soccer training for 16 weeks appears to be sufficient to induce favourable changes in body composition and indicators of aerobic fitness and muscle oxidative capacity in untrained premenopausal women. Copyright (C) 2014, Shanghai University of Sport. Production and hosting by Elsevier B.V. All rights reserved.
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| 6. |
- Mohr, Magni, 1973, et al.
(författare)
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Yo-Yo intermittent recovery test performances within an entire football league during a full season
- 2014
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Ingår i: Journal of Sports Sciences. - : Informa UK Limited. - 0264-0414 .- 1466-447X. ; 32:4, s. 315-327
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Tidskriftsartikel (refereegranskat)abstract
- The study examined Yo-Yo intermittent recovery level 2 (YYIR2) and submaximal YYIR1 test performances in 172 male semi-professional football players (age; 25.8 +/- 4.1 years) representing all teams in a top league at pre-season, start-season, mid-season and end-season. YYIR2 performance was 847 +/- 227m (+/- SD) at pre-season and rose (P<0.05) by 128 +/- 113m to 975 +/- 205m at start of season and further (P<0.05) by 59 +/- 102m to 1034 +/- 211m at mid-season. Submaximal YYIR1 HR was 90.9 +/- 4.2% HRmax at pre-season, which was higher (P<0.05) than at start, mid and end of season (87.0 +/- 3.9, 85.9 +/- 4.1 and 87.0 +/- 3.7% HRmax, respectively). Peak YYIR2 performance and minimum YYIR1 HR were 1068 +/- 193m and 85.1 +/- 3.8% HRmax, respectively, with similar to 50% of the players peaking at mid-season. Top-teams and middle-teams had higher (P<0.05) peak YYIR2 scores (1094 +/- 205 and 1121 +/- 152m, respectively) than bottom-teams (992 +/- 185m). YYIR2 performance was 16% higher (P<0.05) and YYIR1 HR was 1.4% HRmax lower (P<0.05) for regular players than non-regular players at pre-season and remained lower (P<0.05) throughout the season. Central defenders had poorer (P < 0.05) YYIR performances compared to other positional roles. In conclusion, YYIR performances are highly variable within a football league over a season and are influenced by league ranking, regularity of competitive play and playing position.
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| 7. |
- Nielsen, Joachim, et al.
(författare)
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Skeletal muscle glycogen content and particle size of distinct subcellular localizations in the recovery period after a high-level soccer match
- 2012
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Ingår i: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 112:10, s. 3559-3567
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Tidskriftsartikel (refereegranskat)abstract
- Whole muscle glycogen levels remain low for a prolonged period following a soccer match. The present study was conducted to investigate how this relates to glycogen content and particle size in distinct subcellular localizations. Seven high-level male soccer players had a vastus lateralis muscle biopsy collected immediately after and 24, 48, 72 and 120 h after a competitive soccer match. Transmission electron microscopy was used to estimate the subcellular distribution of glycogen and individual particle size. During the first day of recovery, glycogen content increased by ~60% in all subcellular localizations, but during the subsequent second day of recovery glycogen content located within the myofibrils (Intramyofibrillar glycogen, a minor deposition constituting 10–15% of total glycogen) did not increase further compared with an increase in subsarcolemmal glycogen (−7 vs. +25%, respectively, P = 0.047). Conversely, from the second to the fifth day of recovery, glycogen content increased (53%) within the myofibrils compared to no change in subsarcolemmal or intermyofibrillar glycogen (P < 0.005). Independent of location, increment in particle size preceded increment in number of particles. Intriguingly, average particle size decreased; however, in the period from 3 to 5 days after the match. These findings suggest that glycogen storage in skeletal muscle is influenced by subcellular localization-specific mechanisms, which account for an increase in number of glycogen particles located within the myofibrils in the period from 2 to 5 days after the soccer match.
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| 8. |
- Pettersen, S. A., et al.
(författare)
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Caffeine supplementation does not affect match activities and fatigue resistance during match play in young football players
- 2014
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Ingår i: Journal of Sports Sciences. - : Informa UK Limited. - 0264-0414 .- 1466-447X. ; 32:20, s. 1958-1965
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Tidskriftsartikel (refereegranskat)abstract
- The study examined the effect of caffeine supplementation on match activities and development of fatigue during a football match. In a randomised, double-blind cross-over design, two experimental football games separated by 7days were organised between the junior teams of two professional football clubs (17.6 +/- 1.1years (+/- s), 71.7 +/- 6.9kg, 13.9%+/- 5.0% body fat). The players ingested either a capsule of 6mg center dot kg(-1)b.w. caffeine or placebo (dextrose) 65min prior to the matches. Match activities were assessed using the ZXY match analysis system, and a Yo-Yo intermittent recovery test-level 2 (Yo-Yo IR2) was conducted immediately post-game. Heart rate was monitored throughout the game, and blood samples were obtained at baseline, half-time and after the game. There were no differences between caffeine and placebo regarding total distance covered (10,062 +/- 916 vs 9854 +/- 901m), high-intensity running (557 +/- 178 vs 642 +/- 240m), sprinting distance (109 +/- 58 vs 112 +/- 69m) or acceleration counts (123 +/- 31 vs 126 +/- 24). In both trials, players displayed lower (P<0.05) values in total distance and acceleration counts in the last 15min compared to all other 15-min periods of the matches. Post-game Yo-Yo IR2 performance was not different between game trials (caffeine: 829 +/- 322m; placebo 819 +/- 289m). In conclusion, oral caffeine administration does not appear to have an ergogenic effect in young football players during match play.
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