High speed knee extension capacity of soccer players after different kinds of strength training

This study aimed to evaluate the effects playing position, match location (home or away), quality of opposition (strong or weak), effective playing time (total time minus stoppages), and score-line on physical match performance in professional soccer players using a large-scale analysis. A total of 10,739 individual match observations of outfield players competing in the Spanish La Liga during the 2018–2019 season were recorded using a computerized tracking system (TRACAB, Chyronhego, New York, USA). The players were classified into five positions (central defenders, players = 94; external defenders, players = 82; central midfielders, players = 101; external midfielders, players = 72; and forwards, players = 67) and the following match running performance categories were considered: total distance covered, low-speed running (LSR) distance (0–14 km · h−1), medium-speed running (MSR) distance (14–21 km · h−1), high-speed running (HSR) distance (>21 km · h−1), very HSR (VHSR) distance (21–24 km · h−1), sprint distance (>24 km · h−1) Overall, match running performance was highly dependent on situational variables, especially the score-line condition (winning, drawing, losing). Moreover, the score-line affected players running performance differently depending on their playing position. Losing status increased the total distance and the distance covered at MSR, HSR, VHSR and Sprint by defenders, while attacking players showed the opposite trend. These findings may help coaches and managers to better understand the effects of situational variables on physical performance in La Liga and could be used to develop a model for predicting the physical activity profile in competition.

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Musculoskeletal Outcomes from Chronic High-Speed, High-Impulse Resistance Exercise

International Journal of Sports Medicine ◽

10.1055/s-0044-101455 ◽

2018 ◽

Vol 39 (10) ◽

pp. 791-801 ◽

Cited By ~ 4

Author(s):

John Caruso ◽

Michael Voor ◽

Jason Jaggers ◽

T. Symons ◽

Jeremy Stith ◽

...

Keyword(s):

Mechanical Loading ◽

High Speed ◽

Type I Collagen ◽

Training Session ◽

Knee Extension ◽

Type I ◽

Before And After ◽

Force Peak ◽

Blood Marker ◽

Hip Extension

AbstractWhile bones and muscles adapt to mechanical loading, it appears that very specific types of stimuli must be applied to achieve osteogenesis. Our study assessed musculoskeletal outcomes to 30 training sessions on an Inertial Exercise Trainer (Newnan, GA). Subjects (n=13) performed workouts with their left leg, while their right served as an untreated control. Workouts entailed three 60-s sets each of knee extension, hip extension and calf press exercises, separated by 90-s rests. Before and after the 30 training sessions, subjects underwent strength tests (knee and ankle extensors of both legs), DEXA scans (hip, knee and ankles of both legs), and blood draws. After 30 training sessions 2×2 ANOVAs showed left leg peak torques rose significantly. 2×2 ANCOVAs, with bone scan area as a covariate, showed significant left leg calcaneal bone mineral content (+29%) and density (+33%) increases after 30 training sessions. A significant decline in C-terminal telopeptides of type I collagen, a blood marker of bone resorption, also occurred after 30 training sessions. The Inertial Exercise Trainer’s large volume of training session repetitions elicited high peak force, peak acceleration and impulses that likely provided a mechanical loading stimulus that evoked calcaneal accretion.

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The effects of core training given to female soccer players on different vertical jumping methods

Journal of Human Sciences ◽

10.14687/jhs.v16i3.5637 ◽

2019 ◽

Vol 16 (3) ◽

pp. 791-798 ◽

Cited By ~ 3

Author(s):

Mehmet Göktepe ◽

Meral Miyaç Göktepe ◽

Ferhat Güder ◽

Mehmet Günay

Keyword(s):

Strength Training ◽

English Summary ◽

Soccer Players ◽

Favorable Effect ◽

Rank Test ◽

Average Height ◽

Core Strength ◽

The Core ◽

Vertical Jumping ◽

Core Training

This study aims to determine the effects of core training given to female soccer players on their methods of different vertical jumping. 16 female certified soccer players playing in the female soccer team of Bartın University with average age of 21.07±3.56 years, average height of 163.00±7.18 cm and with weight of 56.60±7.15 kg were included in the study on the basis of volunteering. Prior to the tests, all the female soccer players completed a survey form used in determining their medical status and filled in a form to confirm that they participated in the study voluntarily. The core training programme was applied for 8 weeks two times a week regularly. The pre-test and post-test measurements were made and then subjects’ height and weight were measured, they were asked to run for 10 minutes for warm-up and the activity was ended by making jumping measurement. The research was performed in the physiology laboratory of Bartın University School of Physical Education and Sport (BESYO). Statistical evaluation was made by using SPSS 22.0 programme. The values obtained were compared after checking normality distribution through Shapiro-Wilk test with the help of Wilcoxon signed rank test. This study, we aimed to determine the effect of core strength training on different vertical jump methods applied to female soccer players. It has been observed that it has a favorable effect on counter movement jumping (CMJ) and static jumping (SJ) values (p <0.05). It was found that there was no statistically significant effect on drop jumping (DJ) values (p> 0.05). As a result; It can be said that the core strength training practiced in female soccer players developed counter movement jumpingand static jumping characteristic of vertical jumping methods and did not affect the drop jumpingfeature. In line with these results, it is recommended to take into account the core training programs because the strength training that will be applied in female soccer players can improve the counter movement jumping and static jumping feature. Extended English summary is in the end of Full Text PDF (TURKISH) file. Özet Bu araştırmanın amacı, kadın futbolculara uygulanan kor kuvvet antrenmanlarının farklı dikey sıçrama yöntemlerine etkisinin belirlenmesidir. Çalışmaya Bartın Üniversitesi Kadın Futbol Takımında lisanslı, yaş ortalamaları 21,07±3,56 yıl, boy ortalamaları 163,00±7,18 (cm) ve vücut ağırlıkları 56,60±7,15 (kg) olan gönüllü 16 kadın futbolcu dahil edilmiştir. Testlerden önce araştırmaya katılan kadın futbolcular sağlık durumlarını belirtir sağlık anketini ve gönüllü katılım formunu doldurup imzalamışlardır. Kor antrenman programı 8 hafta boyunca, haftada 2 gün düzenli olarak uygulanmıştır. Çalışmaya katılan kadın futbolculara sırasıyla; boy ve vücut ağırlığı ölçümü yapıldı. 10 dakika ısınma koşusu yaptırıldıktan sonra, sıçrama ölçümleri yapılarak çalışma sonlandırıldı. Bu araştırma Bartın Üniversitesi BESYO Fizyoloji Laboratuvarında yapılmıştır. İstatistiksel değerlendirme SPSS 22.0 programı kullanılarak yapıldı. Ön test ve son testten elde edilen değerler, Shapiro-Wilk testi ile normallik dağılımına bakıldıktan sonra Wilcoxon İşaretli Sıralar testi yardımı ile istatistiksel olarak karşılaştırılmıştır. Çalışmamızın bulgularına göre; kadın futbolculara uygulanan kor kuvvet antrenmanlarının farklı dikey sıçrama yöntemlerine etkisinin belirlenmesi amacıyla yapmış olduğumuz çalışmamızda uygulanan kor kuvvet antrenmanlarının dikey sıçrama yöntemlerinden; yaylanarak sıçrama (YS) ve statik sıçrama (SS) değerlerine olumlu düzeyde etki ettiği gözlemlenmiştir (p<0.05). Düşerek sıçrama (DS) değerlerine ise istatistiksel olarak etkisinin olmadığı tespit edilmiştir (p>0.05). Sonuç olarak; kadın futbolcularda uygulanan kor kuvvet antrenmanlarının dikey sıçrama yöntemlerinden statik sıçrama ve yaylanarak sıçrama özelliğini geliştirdiği, düşerek sıçrama özelliğine ise etki etmediği söylenebilir. Bu sonuçlar doğrultusunda kadın futbolcularda uygulanacak kor kuvvet antrenmanlarının statik sıçrama ve yaylanarak sıçrama özelliğine olumlu yönde etkisi olabileceğinden antrenman programlarında göz önünde bulundurulması önerilebilir.

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ISOKINETIC PROFILES AND REFERENCE VALUES OF PROFESSIONAL SOCCER PLAYERS

Revista Brasileira de Medicina do Esporte ◽

10.1590/1517-8692202127062021_0073 ◽

2021 ◽

Vol 27 (6) ◽

pp. 610-615

Author(s):

Guillermo Charneco Salguero ◽

Francisco García-Muro San José ◽

Arturo Pérez Gosalvez ◽

Jose Miguel Cárdenas Rebollo ◽

Isabel Brígido Fernández ◽

...

Keyword(s):

Reference Values ◽

Health Professionals ◽

High Speed ◽

Peak Torque ◽

Soccer Players ◽

Level Of Evidence ◽

Warm Up ◽

Professional Soccer ◽

Average Work ◽

Torque Values

ABSTRACT Introduction: Isokinetics is a tool commonly used in professional soccer. There is ongoing debate among researchers as to the isokinetic reference values a player should have. Objectives: To determine the absolute peak torque (PT) and average work of professional soccer players in relation to their positions on the field, and to establish the reference values for these variables. Methods: Purposeful sampling was used to select 289 professional soccer players. The sample included 32 goalkeepers, 100 defenders, 98 midfielders, and 59 strikers. The participants were measured preseason. The players were asked to perform a 10-minute warm-up on an exercise bike, and then to perform 5 repetitions at low speed, 10 at medium speed, and 25 at high speed, with 30 to 40-s of rest between each set of repetitions. The contraction method was concentric-concentric in a dynamometer Isomed 2000. Results: The average age, weight, and height of the players was 21.9 years, 74.3 kilograms, and 1.8 meters, respectively. The goalkeepers presented higher PT at the 3 measured speeds, and the higher average work at 180°/s and 240°/s in relation to defenders and midfielders. The strikers presented higher average work at 240°/s in relation to midfielders, and higher PT in relation to the defenders and midfielders. Absolute values were shown and reference values were established. Conclusions: The goalkeepers and strikers were the players that showed the greatest differences in their favor in relation to the other positions. The peak torque values and average work were described in relation to the player's position on the field. This study resulted in the creation of a tool for health professionals working with professional soccer players, providing reference values for these players in relation to their position on the field that can be used as benchmarks, by health professionals, to optimize soccer players’ performance. Level of evidence II, Prospective comparative study.

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Characteristics associated with improved knee extension after strength training for individuals with cerebral palsy and crouch gait

Journal of Pediatric Rehabilitation Medicine ◽

10.3233/prm-2012-0201 ◽

2012 ◽

Vol 5 (2) ◽

pp. 99-106 ◽

Cited By ~ 22

Author(s):

K.M. Steele ◽

D.L. Damiano ◽

M.N. Eek ◽

M. Unger ◽

S.L. Delp

Keyword(s):

Cerebral Palsy ◽

Strength Training ◽

Knee Extension ◽

Crouch Gait

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The Influence of Changes in Acute Training Load on Daily Sensitivity of Morning-Measured Fatigue Variables in Elite Soccer Players

International Journal of Sports Physiology and Performance ◽

10.1123/ijspp.2016-0433 ◽

2017 ◽

Vol 12 (s2) ◽

pp. S2-107-S2-113 ◽

Cited By ~ 33

Author(s):

Robin T. Thorpe ◽

Anthony J. Strudwick ◽

Martin Buchheit ◽

Greg Atkinson ◽

Barry Drust ◽

...

Keyword(s):

Heart Rate ◽

Sleep Quality ◽

High Speed ◽

Muscle Soreness ◽

Linear Models ◽

Heart Rate Recovery ◽

Training Load ◽

Soccer Players ◽

Daily Training ◽

Submaximal Heart Rate

Purpose:To determine the sensitivity of a range of potential fatigue measures to daily training load accumulated over the previous 2, 3, and 4 d during a short in-season competitive period in elite senior soccer players (N = 10).Methods:Total highspeed-running distance, perceived ratings of wellness (fatigue, muscle soreness, sleep quality), countermovement-jump height (CMJ), submaximal heart rate (HRex), postexercise heart-rate recovery (HRR), and heart-rate variability (HRV: Ln rMSSD) were analyzed during an in-season competitive period (17 d). General linear models were used to evaluate the influence of 2-, 3-, and 4-d total high-speed-running-distance accumulation on fatigue measures.Results:Fluctuations in perceived ratings of fatigue were correlated with fluctuations in total high-speed-running-distance accumulation covered on the previous 2 d (r = –.31; small), 3 d (r = –.42; moderate), and 4 d (r = –.28; small) (P < .05). Changes in HRex (r = .28; small; P = .02) were correlated with changes in 4-d total high-speed-running-distance accumulation only. Correlations between variability in muscle soreness, sleep quality, CMJ, HRR%, and HRV and total high-speed-running distance were negligible and not statistically significant for all accumulation training loads.Conclusions:Perceived ratings of fatigue and HRex were sensitive to fluctuations in acute total high-speed-running-distance accumulation, although sensitivity was not systematically influenced by the number of previous days over which the training load was accumulated. The present findings indicate that the sensitivity of morning-measured fatigue variables to changes in training load is generally not improved when compared with training loads beyond the previous day’s training.

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Strength training in professional soccer: effects on short-sprint and jump performance

International Journal of Sports Medicine ◽

10.1055/a-1653-7350 ◽

2021 ◽

Author(s):

Javier Nuñez ◽

Luis Suarez-Arrones ◽

Moisés de Hoyo ◽

Irineu Loturco

Keyword(s):

Strength Training ◽

Meta Analysis ◽

Vertical Jump ◽

Soccer Players ◽

Validity And Reliability ◽

Jump Performance ◽

Training Strategy ◽

Performance Improvements ◽

Professional Soccer ◽

Training Schemes

Several studies have confirmed the efficacy of strength training to maximize soccer player performance during competition. The aim of this meta-analysis was to determine the effects of different strength training protocols on short-sprint and vertical jump performance of professional soccer players from the first division of their countries. The following inclusion criteria were employed for the analysis: (a) randomized studies; (b) high validity and reliability instruments; (c) studies published in a high-quality peer-reviewed journal; (d) studies involving professional soccer players from the first division; (e) studies with descriptions of strength training programs; and (f) studies where countermovement jump and 10-m sprint time were measured pre and post training. Overall, the different strength-oriented training schemes produced similar performance improvements, which seem not to depend on the training strategy. Strength training appears to have a lower effect when applied during in-season than when applied in pre-season periods in first division soccer players. In this meta-analysis it is not possible to confirm that strength training in isolation is capable of improving the short-sprint and jump performance of elite soccer players. The congested fixture schedule and, thus, the limited time to perform complementary (non-specific) training sessions, may contribute to these reduced effects.

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