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Correlations between Maximal Strength Tests at Different Squat Depths and Sprint Performance in Adolescent Soccer Players
Michael Keiner,
Andre Sander,
Klaus Wirth,
Hagen Hartmann,
Dennis Yaghobi
Issue:
Volume 2, Issue 6-1, December 2014
Pages:
1-7
Received:
5 November 2014
Accepted:
17 November 2014
Published:
22 November 2014
DOI:
10.11648/j.ajss.s.2014020601.11
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Abstract: For track, field and team sports, many authors advise sport-specific strength training with half and quarter squats instead of parallel squats. Due to the sport-specific argument, higher correlations with sprint performance could be expected for half and quarter squats. Hence, correlations between sprint performance (30 m linear sprint) and both One-Repetition-Maximum (1RM) and 1RM in relation to body weight (REL) in young, elite soccer athletes (n=28) were calculated for different squat depths (parallel, half and quarter). Further isometric maximum strength measurements of the trunk muscles were made. Normally distributed data were analysed using Pearson’s correlation coefficients. For correlation comparisons, Fisher’s z-transformation was computed and the empirical value was compared to the critical value. The data show significant moderate to high correlations for all 3 squat depths (REL) and the performance in linear sprint LS (r = -0.40 to -0.63). No significant differences were found between the correlations of the different squats. However, low to moderate correlations between the maximum trunk strength values and the performance in LS were calculated (r = -0.25 to -0.48). Medium to high correlations between the different squat depths and trunk strength parameters were measured (r = 0.47 to 0.75). Because there is no statistical difference between the correlations of the squat and sprint performances, the researchers’ advice is to train and test with the parallel or deep squat because the deeper squat variant requires less weight to generate an adequate stress stimulus for the lower extremities compared with the quarter and half squats.
Abstract: For track, field and team sports, many authors advise sport-specific strength training with half and quarter squats instead of parallel squats. Due to the sport-specific argument, higher correlations with sprint performance could be expected for half and quarter squats. Hence, correlations between sprint performance (30 m linear sprint) and both On...
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Differences in Loaded and Unloaded Vertical Jumping Ability and Sprinting Performance between Brazilian Elite Under-20 and Senior Soccer Players
Irineu Loturco,
Ronaldo Kobal,
Saulo Gil,
Bruno Pivetti,
Katia Kitamura,
Lucas A. Pereira,
Cesar Cavinato Cal Abad,
Fabio Yuzo Nakamura
Issue:
Volume 2, Issue 6-1, December 2014
Pages:
8-13
Received:
29 November 2014
Accepted:
2 December 2014
Published:
27 December 2014
DOI:
10.11648/j.ajss.s.2014020601.12
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Abstract: The aim of this study was to compare performance in sprint, change of direction speed, vertical jump and jump squat tests between elite soccer players from two different age categories (i.e., under-20 and senior players) from the same soccer club. Players performed sprints (average velocity at 5, 10 and 20 m), zig-zag change of direction speed (COD speed), squat and countermovement jump tests and loaded jump squats to obtain the maximum mean propulsive power (MPP) value. Senior players performed better in absolute MPP, while the relative MPP (W/kg) was higher in the U-20 players. Moreover, except for COD speed and average velocity from zero to 5 m (VEL 5 m), the senior soccer players presented superior performance in all tested variables (SJ, CMJ, VEL 10 m, VEL 20 m). In conclusion, most neuromuscular variables improve during the transition from the end of adolescence to the mature phase. However, to enhance the power abilities and sprinting capacity over very short-distances of senior soccer players, soccer fitness coaches are encouraged to increase the frequency and volume of strength/power training during the competitive season.
Abstract: The aim of this study was to compare performance in sprint, change of direction speed, vertical jump and jump squat tests between elite soccer players from two different age categories (i.e., under-20 and senior players) from the same soccer club. Players performed sprints (average velocity at 5, 10 and 20 m), zig-zag change of direction speed (COD...
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Anthropometric Characteristic, Body Composition and Somatotype of Canadian Female Soccer Players
Anup Adhikari,
Jady Nugent
Issue:
Volume 2, Issue 6-1, December 2014
Pages:
14-18
Received:
2 December 2014
Accepted:
12 December 2014
Published:
27 January 2015
DOI:
10.11648/j.ajss.s.2014020601.13
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Abstract: Canadian female junior soccer players were evaluated for their anthropometrical characteristics including somatotype and body composition with a aim to evaluate with their international counterparts. 18 female soccer players with an average age of 16(±0.5) of a local club were assessed during their peak season time . Somatotype was assessed using Heath-Carter method and body composition ( Fat%) was assessed by surface anthropometry . Endomorphic mesomorph (3.0 ±0.8 ─ 3.9±0.8 ─2.58±1.0 ) body type was observed in average with an average 22.1(±3.1) % body fat. Average waist-hip ratio was 0.7 (±0.03) . Though BMI does not reflect the obesity precisely in athletic population, average BMI of the female soccer group was in normal range with an average value of 21.5 (±1.8) kg.m-2 .Thus the Canadian junior female soccer players possessed an average muscularity with slightly higher fat % compare to national level female athletes . The group needed more muscularity with less fattiness.
Abstract: Canadian female junior soccer players were evaluated for their anthropometrical characteristics including somatotype and body composition with a aim to evaluate with their international counterparts. 18 female soccer players with an average age of 16(±0.5) of a local club were assessed during their peak season time . Somatotype was assessed using H...
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A Study on Impact of Receiving Training on Football and Sprinting on Body Composition and Physical Fitness Status of Adolescent Males
Neepa Banerjee,
Sandipan Chatterjee,
Surjani Chaterjee,
Ayan Chatterjee,
Satabdi Bhattacharjee,
Tanaya Santra,
Bijan Saha,
Shankarashis Mukherjee,
Indranil Manna
Issue:
Volume 2, Issue 6-1, December 2014
Pages:
19-23
Received:
6 February 2015
Accepted:
8 February 2015
Published:
5 March 2015
DOI:
10.11648/j.ajss.s.2014020601.14
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Abstract: Physical characteristics and body composition have been known to be fundamental to excellence in athletic performance. Specific athletic events require different body types and weights for maximal performance. Therefore determination of body constitution and fitness status of an athlete is very important for producing maximal performance. With growth of children and adolescents there is a change in body composition parameters and the gender difference becomes more pronounced. Soccer playing and sprinting are the popular playing events. Both of them require fast body movements and therefore receiving training on these games may have some impact on body constitution and eventually on fitness status. A study was undertaken, in this backdrop, on randomly selected male adolescents of age range 12-18 years, receiving training in football (n1 = 36) and in sprinting (n2 = 32), the inclusion criterion being that the volunteers for the study should be receiving training for at least a period of 3 years with no chronic disease history. It has been observed that male adolescent individuals receiving similar pattern of training in football and sprinting did not vary significantly in terms of body composition but those being trained in football having better fitness status, compared to their sprinter counterparts.
Abstract: Physical characteristics and body composition have been known to be fundamental to excellence in athletic performance. Specific athletic events require different body types and weights for maximal performance. Therefore determination of body constitution and fitness status of an athlete is very important for producing maximal performance. With grow...
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Sports Injuries with Special Reference to Soccer: Causes, Consequences and Prevention Strategies
Surjani Chaterjee,
Neepa Banerjee,
Satabdi Bhattacharjee,
Tanaya Santra,
Ayan Chatterjee,
Sandipan Chatterjee,
Bijan Saha,
Shankarashis Mukherjee,
Indranil Manna
Issue:
Volume 2, Issue 6-1, December 2014
Pages:
24-30
Received:
6 February 2015
Accepted:
8 February 2015
Published:
5 March 2015
DOI:
10.11648/j.ajss.s.2014020601.15
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Abstract: Sports injury occurs during a sporting activity caused by overuse, direct impact, or the application of force that is greater than the body part can structurally withstand. Soccer is usually defined as a body contact outdoor game and therefore there is a chance of being injured by the opponents or due to not following proper playing rule or not using protective equipment. To maximize the health benefits of sports and exercise and to minimize the direct and indirect costs associated with injuries, developing and adopting injury prevention strategies is an important goal. Successful sports injury prevention programme requires successful implementation of effective interventions. This paper reviews the main mechanisms and risk factors for injuries to the head, groin, knee, ankle, muscle as well as the evidence supporting various strategies to prevent them. Approaches that have been shown to be successful include: (1) using protective equipment to reduce injury risk, (2) adopting the rules of play, and (3) specific exercise programmes developed to reduce injury risk.
Abstract: Sports injury occurs during a sporting activity caused by overuse, direct impact, or the application of force that is greater than the body part can structurally withstand. Soccer is usually defined as a body contact outdoor game and therefore there is a chance of being injured by the opponents or due to not following proper playing rule or not usi...
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