| 1. |
- Fransson, Dan, 1980, et al.
(författare)
-
Running intensity fluctuations indicate temporary performance decrement in top-class football
- 2017
-
Ingår i: Science and Medicine in Football. - : Informa UK Limited. - 2473-3938 .- 2473-4446. ; 1:1, s. 10-17
-
Tidskriftsartikel (refereegranskat)abstract
- Match analyses were performed on 473 top-class male footballers. Distances covered during peak-distance 1-, 2- and 5-min periods of a game were 98 ± 5, 135 ± 8 and 235 ± 13 m at speeds >14 km·h−1. In the 5-min period following peak-distance 1-, 2- and 5-min periods, players had a high-intensity running distance deficit (P < 0.05) of 21, 18 and 17 m, respectively, compared to average 5-min distance. High-intensity running distances covered in peak-distance 5- and 1-min periods were greater (P < 0.05) for all playing positions other than central defender. In the 5-min period following the peak-distance 5-min period, less (P < 0.05) high-intensity distance was covered for all playing positions than in the average 5-min period. Distances covered by substitutes during the last 15 min of a game at speeds >11->24 km·h−1 were greater (18–39%; P < 0.05) compared to full-game players. In 5-min period following peak-distance 1-, 2- and 5-min periods, substitutes performed 9–21% less high intensity running than on average. In conclusion, peak-distance 1-, 2- and 5-min periods in a top-class football game reduce high-intensity running distance in the following 5-min period for all playing positions in both full-game players and substitutes. Thus, these short-term periods of a game may induce temporary performance decrement in top-class football players
|
|
| 2. |
- Krustrup, P., et al.
(författare)
-
Broad-spectrum health improvements with one year of soccer training in inactive mildly hypertensive middle-aged women
- 2017
-
Ingår i: Scandinavian Journal of Medicine & Science in Sports. - : Wiley. - 0905-7188. ; 27:12, s. 1893-1901
-
Tidskriftsartikel (refereegranskat)abstract
- The study tested the hypothesis that long-term soccer training has positive impact on cardiovascular profile, body composition, bone health, and physical capacity in inactive, pre-menopausal women with mild hypertension. The study applied a randomized controlled design in which physically inactive middle-aged women were separated into a soccer training group (n=19; SOC) and a control group (n=12; CON). SOC performed 128 +/- 29 (+/- SD) one-h small-sided soccer training sessions over one year. Blood pressure, body composition, blood lipid profile, and fitness level were determined pre- and post-intervention. Over one year, mean arterial pressure decreased more in SOC than in CON (-5 +/- 7 vs +4 +/- 5mmHg; P<.05). Total-body fat mass decreased more (P<.05) in SOC than in CON (-2.5 +/- 2.5 vs +0.6 +/- 3.2kg; P<.05), while the change scores for lean body mass were not significantly different in SOC (2.6 +/- 2.7kg) compared to CON (1.1 +/- 1.9kg, P=.09). Over one year, change scores in whole-body bone mineral density (0.004 +/- 0.032 vs -0.019 +/- 0.026gcm2) as well as bone mineral content (30 +/- 70 vs -39 +/- 113g) were positive in SOC compared to CON (P<.05). Post-intervention plasma triglycerides decreased more (-0.1 +/- 0.7 vs +0.2 +/- 0.2mmolL-1) and HDL cholesterol increased more (0.2 +/- 0.7 vs -0.2 +/- 0.2mmolL-1) in SOC than in CON (P<.05). Yo-Yo intermittent endurance level 1 (122 +/- 105 vs 2 +/- 21%) and 20-m sprint performance (6 +/- 6 vs -1 +/- 2%) increased more (P<.05) in SOC than in CON. In conclusion, long-term soccer training resulted in broad-spectrum improvements in the health profile of untrained, pre-menopausal women with mild hypertension, including cardiovascular, metabolic, and musculo-skeletal benefits.
|
|
| 3. |
- Mohr, Magni, 1973, et al.
(författare)
-
Muscle ion transporters and antioxidative proteins have different adaptive potential in arm than in leg skeletal muscle with exercise training
- 2017
-
Ingår i: Physiological Reports. - : Wiley. - 2051-817X. ; 5:19
-
Tidskriftsartikel (refereegranskat)abstract
- It was evaluated whether upper-body compared to lower-body musculature exhibits a different phenotype in relation to capacity for handling reactive oxygen species (ROS), H+, La-, Na+, K+ and also whether it differs in adaptive potential to exercise training. Eighty-three sedentary premenopausal women aged 45 +/- 6 years (mean +/- SD) were randomized into a high-intensity intermittent swimming group (HIS, n = 21), a moderate-intensity swimming group (MOS, n = 21), a soccer group (SOC, n = 21), or a control group (CON, n = 20). Intervention groups completed three weekly training sessions for 15 weeks, and pre- and postintervention biopsies were obtained from deltoideus and vastus lateralis muscle. Before training, monocarboxylate transporter 4 (MCT4), Na+/K+ pump alpha(2), and superoxide dismutase 2 (SOD2) expressions were lower (P < 0.05) in m. deltoideus than in m. vastus lateralis, whereas deltoid had higher (P < 0.05) Na+/H+ exchanger 1 (NHE1) expression. As a result of training, Na+/K+ pump alpha(2) isoform expression was elevated only in deltoideus muscle, while upregulation (P < 0.05) of the alpha(1) and beta(1) sub-units, phospholemman (FXYD1), NHE1, and superoxide dismutase 1 expression occurred exclusively in vastus lateralis muscle. The increased (P < 0.05) expression of MCT4 and SOD2 in deltoid muscle after HIS and vastus lateralis muscle after SOC were similar. In conclusion, arm musculature displays lower basal ROS, La-, K+ handling capability but higher Na+-dependent H+ extrusion capacity than leg musculature. Training-induced changes in the ion-transporting and antioxidant proteins clearly differed between muscle groups.
|
|
