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Effects of the 11+ and Harmoknee Warm-up Programs on Physical Performance Measures in Professional Soccer Players.

ABSTRACT: The purpose of this study was to examine the effects of the 11+ and HarmoKnee warm-up programs on performance measures in professional soccer players. Thirty-six male professional soccer players (age: 18.9 ± 1.4 years) were divided into 3 groups, the 11+, HarmoKnee and control group (n = 12 per group). The experimental groups performed the programs 3 times per week for 2 months (24 sessions), whereas the control group only performed their regular soccer training. The performance tests carried out were: 10m speed tests with and without a ball, 20m single sprint, vertical jump, Wall-Volley and Illinois agility tests. The 11+ group demonstrated significant increases from pre-to-post time points in the vertical jump (3.7%), Wall- Volley (5.4%) and Illinois agility tests (1.7%), while the HarmoKnee group showed a significant increase in Wall-Volley test, with a 5.2% increase. The repeated measures analysis revealed differences between the groups (large effect size) in the 11+ and HarmoKnee groups, compared to the control group, in 10m speed tests with and without a ball, 20m single sprint and Illinois agility tests (p < 0.05). Thus 8-weeks performing the 11+ warm-up program can enhance jump height, agility and soccer skill while the HarmoKnee program generally only improves soccer skill in young professional male soccer players. Key PointsThe 11+ improves performance by means of Illinois agility, vertical jump and Wall-Volley tests whereas HarmoKnee improves Wall-Volley test. Incorporating 11+ as a part of the warm-up program by the young teams would be beneficial in agility, leg power and soccer skill respectively.Further modification of both programs may be required to fully realize the players' speed performance potential.Data from this research can be helpful for soccer trainers in choosing programs to enhance performances in young male professional soccer players.

SUBMITTER: Daneshjoo A

PROVIDER: S-EPMC3772593 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Effects of the 11+ and Harmoknee Warm-up Programs on Physical Performance Measures in Professional Soccer Players.

Daneshjoo Abdolhamid A Mokhtar Abdul Halim AH Rahnama Nader N Yusof Ashril A

Journal of sports science & medicine 20130901 3

The purpose of this study was to examine the effects of the 11+ and HarmoKnee warm-up programs on performance measures in professional soccer players. Thirty-six male professional soccer players (age: 18.9 ± 1.4 years) were divided into 3 groups, the 11+, HarmoKnee and control group (n = 12 per group). The experimental groups performed the programs 3 times per week for 2 months (24 sessions), whereas the control group only performed their regular soccer training. The performance tests carried ou ...[more]

PMID: 24149156

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Project description:The current study had two aims. The primary purpose was to examine the association between serum vitamin D levels and the ergometric evaluation of muscle strength, aerobic capacity, and speed in professional soccer players. The secondary aim was to evaluate the effects of the soccer off-season period on serum vitamin D levels.Sixty-seven Caucasian male soccer players (age 25.6 ± 6.2 and height 1.81 ± 0.08 m), members of two Greek Superleague Soccer teams and one Football-league championship team participated in this study. Exercise performance testing for the determination of squat jump (SJ), countermovement jump (CMJ), 10 (10 m) and 20 meters (20 m) sprint performance, maximal oxygen consumption (VO2max), anthropometry, and blood sampling were performed before (pre) and after (post) the six-week off-season period.Analysis of our results showed the following: (a) a significant correlations between serum vitamin D levels and performance parameters in both pre (SJ; P < 0.001, CMJ; P < 0.001, VO2max; P < 0.001, 10 m; P < 0.001, and 20 m; P < 0.001) and post (SJ; P < 0.001, CMJ; P<0.001, VO2max; P = 0.006, 10 m; P < 0.001, and 20 m; P < 0.001) experimental sessions. (b) Vitamin D concentration increased significantly (P < 0.001) following the six-week off-season period compared to baseline, while at the same time all measured performance parameters decreased (SJ; P < 0.001, CMJ; P < 0.001, 10 m; P < 0.001, 20 m; P < 0.001, VO2max; P<0.001).Our findings suggest that vitamin D levels are associated with the ergometric evaluation of muscle strength, as expressed by SJ and CMJ, sprinting capacity, and VO2max in professional soccer players, irrespective the levels of performance. Furthermore, our data reaffirm the importance of UVB on serum vitamin D levels. Moreover, reductions in exercise training stress may also have beneficial effects on vitamin D levels, suggesting a possible association of its levels and the training-induced stress. Our results indicate a possibly bidirectional interaction between soccer performance indices and vitamin D levels.

Project description:Background:Strong evidence supports the use of the FIFA 11?+?injury risk reduction warm-up program among soccer players, but few studies have investigated its impact on physical performance and movement control in athletes younger than 12 years of age, or the athletes' opinions of participating in the program. Purpose:The primary purpose of this study was to measure the impact of the FIFA 11?+?program on movement control [Landing Error Scoring System (LESS) and Y-Balance test (YBT)], agility, vertical jump (VJ) height, and trunk muscle endurance compared to a standard warm-up in pre-teen female athletes over one indoor soccer season. A secondary purpose was to assess the athletes' tolerance and enjoyment of the program. Study Design:Cluster randomized controlled trial. Methods:All six teams in the U10 and U11 female divisions of a developmental-level soccer club were cluster randomized to the FIFA 11?+?program intervention group or the control group. Participants in the control group continued with a coach-determined warm-up for the duration of a five-month indoor soccer season. Pre- and post-season participants underwent physical testing using the agility T-test, Belt Mat vertical jump (VJ), and static plank tests; and two measures of neuromuscular control (LESS, YBT). Following the soccer season, the athletes in the intervention group also completed a bespoke Tolerance and Enjoyment questionnaire. Results:The 11?+?group (n = 25) increased their mean static plank hold time by 26.1?±?38.5 seconds compared to the control group (n = 18), who only increased by 2.1?±?37.1 seconds (p = 0.047). For all athletes, there were improvements in mean LESS score (0.6?±?1.3, p = 0.003), and T-test time (0.4?±?0.7, p = 0.001); however, YBT scores worsened by approximately 2% from pre- to postseason. No differences were found for VJ. Athletes tolerated the program well, but the majority described the enjoyment of completing the program as moderately low. Conclusion:This study suggests that the 11?+?program may improve some aspects of physical performance in 9-11 year-old female soccer players, but the low enthusiasm for the program could have longer term adherence implications. Level of Evidence:2b.

Dataset Information

Effects of the 11+ and Harmoknee Warm-up Programs on Physical Performance Measures in Professional Soccer Players.

Publications

Effects of the 11+ and Harmoknee Warm-up Programs on Physical Performance Measures in Professional Soccer Players.

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