scholarly journals Effects of an Initial Muscle Strength Level on Sports Performance Changes in Collegiate Soccer Players

Sports ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 127 ◽  
Author(s):  
Ai Ishida ◽  
Kyle Rochau ◽  
Kyle P. Findlay ◽  
Brandon Devero ◽  
Marco Duca ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Strength Training ◽  
Physical Performance ◽  
Peak Power ◽  
Vertical Jump ◽  
Performance Testing ◽  
Peak Force ◽  
Soccer Players ◽  
Sports Performance ◽  
And Performance

The purposes of this study were to investigate effects of partial block periodized strength training on physical performance and to examine relationships between initial muscle strength measured with isometric mid-thigh pull (IMTP) and performance changes after 7 weeks of strength training. Seventeen collegiate male soccer players participated. Initial muscle strength was determined using IMTP while physical performance included 10 m and 20 m sprints and static vertical jump with a polyvinyl chloride pipe (SJ0), 20 kg barbell (SJ20), and barbell loaded to 40 kg bar (SJ40). Performance testing was performed at three points: before first week (baseline), fourth week (T1), and seventh week (T2). Statistically small to moderate changes were found from baseline to T2 in peak power (PP; p < 0.001, ES = 0.49), net impulse (NI; p < 0.001, ES = 0.49), peak velocity (PV; p < 0.001, ES = 0.62), allometrically scaled PP (PPa; p < 0.001, ES = 0.62) in SJ20 and jump height (JH) in SJ40 (p < 0.001, ES = 0.36). Moderate to large correlations were found between isometric peak force and the changes from baseline to T2 in SJ20 PP (p = 0.04, r = −0.49), SJ20 PF (p = 0.03, r = −0.52), PPa (p = 0.04, r = −0.50), and SJ20 allometrically scaled peak force (p = 0.04, r = −0.49). Properly structured strength training maximizes task-specific physical performance. Initial muscle strength negatively affects the magnitudes of adaptations to physical performance.

Association of plasma 25-hydroxyvitamin D with physical performance in physically active children

2016 ◽  
Vol 41 (11) ◽  
pp. 1124-1128 ◽  
Author(s):  
Ikram Bezrati ◽  
Raouf Hammami ◽  
Mohamed Kacem Ben Fradj ◽  
Domenico Martone ◽  
Johnny Padulo ◽  
...  
Keyword(s):  
Vitamin D ◽  
Muscle Strength ◽  
Physical Performance ◽  
Vertical Jump ◽  
Performance Testing ◽  
Skeletal Muscle Function ◽  
Cross Sectional ◽  
Physically Active ◽  
Hydroxyvitamin D ◽  
25 Hydroxyvitamin D

Vitamin D is thought to regulate skeletal muscle function and boost physical performance. The aim of this study was to assess the relationship between vitamin D and physical performance in physically active children. This cross-sectional study included 125 children who practice football as a leisure activity. Plasma 25-hydroxyvitamin D (25-OHD) was assessed using a chemiluminescence immunoassay method. Vitamin D inadequacy was defined as 25-OHD < 20 ng/mL. Physical performance testing included measurements of muscle strength (maximal isometric contraction), jumping ability (vertical jump, standing broad jump, triple hop test), linear sprint (10 m and 20 m), and agility (9 × 4-m shuttle run). Plasma 25-OHD concentrations were positively correlated with muscle strength (r = 0.539; p < 0.001), vertical jump (r = 0.528; p < 0.001), and standing broad jump (r = 0.492; p < 0.001) but inversely correlated with sprint performance (r = –0.539; p < 0.001). In multivariate analysis models, plasma 25-OHD concentrations were associated with each physical performance parameter independently of age, maturity status, body mass index, fat mass, and protein and calcium intakes. In conclusion, a low plasma 25-OHD level was associated with decreased muscle strength, agility, and jumping and sprinting abilities in physically active children. Vitamin D inadequacy may limit exercise performance. Further research should verify whether correction of vitamin D deficiency enhances physical performance.

Impact of COVID-19 Lockdown on Serie A Soccer Players’ Physical Qualities

2021 ◽  
Author(s):  
Ermanno Rampinini ◽  
Federico Donghi ◽  
Marco Martin ◽  
Andrea Bosio ◽  
Marco Riggio ◽  
...  
Keyword(s):  
Aerobic Fitness ◽  
Mixed Models ◽  
Peak Power ◽  
Vertical Jump ◽  
Soccer Players ◽  
Limited Evidence ◽  
Professional Soccer ◽  
Home Based ◽  
Before And After ◽  
Different Seasons

AbstractIn March 2020, the COVID-19 pandemic forced most activities in Italy, including soccer, to cease. During lockdown, players could only train at home, with limited evidence regarding the effect of this period. Therefore, this study aimed to investigate the effect of COVID-19 lockdown on professional soccer players’ physical performance. Aerobic fitness and vertical jump were assessed before and after four periods in two different seasons: COVID-19 lockdown, competitive period before lockdown, competitive period and summer break of the 2016–2017 season. Linear mixed models were used to examine within-period changes and between-period differences in changes observed during COVID-19 lockdown and the three other periods. Within-period changes in aerobic fitness showed a significant improvement following COVID-19 lockdown (p<0.001) and a significant decline during summer break (p<0.001). Between-period differences were significant in the comparison of COVID-19 lockdown with both the competitive 2019–2020 season (p<0.01) and summer break (p<0.001). For the vertical jump, only the between-period comparison revealed significant differences as the changes associated with COVID-19 lockdown were worse than those of the two competitive periods, for both absolute (p<0.05; p<0.001) and relative peak power (p<0.01; p<0.001). Home-based training during lockdown was effective to improve aerobic fitness, although it did not allow players to maintain their competitive period’s power levels.

scholarly journals Sleep Data, Physical Performance, and Injuries in Preparation for Professional Mixed Martial Arts

Sports ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Corey Peacock ◽  
Mauricio Mena ◽  
Gabriel Sanders ◽  
Tobin Silver ◽  
Douglas Kalman ◽  
...  
Keyword(s):  
Heart Rate ◽  
Physical Performance ◽  
Performance Measures ◽  
Martial Arts ◽  
Sleep Latency ◽  
Heart Rate Recovery ◽  
Vertical Jump ◽  
Performance Testing ◽  
Sleep Efficiency ◽  
Mixed Martial Arts

The purpose of this investigation is to present observational data regarding sleep variables in professional Mixed Martial Arts (MMA) athletes. These sleep performance measures were related to physical performance and injury in MMA athletes. Eight professional athletes were placed into a quasi-controlled, multivariable fight-camp environment for a six-week period in preparation for fight competition. Throughout a six-week fight camp environment, athletes were continuously monitored for sleep performance measures (sleep latency, sleep efficiency, onset, and wake variances) via validated wearable sleep monitoring technology. Athletes were tested seven days prior to competition on measures of physical performance (vertical jump, VO2max, heart rate recovery, prowler sled push, and pull-ups). Multiple correlational analyses were utilized to assess relationships between all sleep and physical performance measures. There were significant (P < 0.05) correlations between sleep latency and VO2max, heart rate recovery, prowler sled push, vertical jump, and missed practice sessions. There were also significant (P < 0.05) correlations between average fall asleep time and heart rate recovery. Lastly, there were significant (P < 0.05) correlations between sleep efficiency, heart rate recovery, and missed practice sessions. MMA athletes who exhibited consistency in sleep demonstrated stronger relationships with performance testing during the fight-camp period.

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

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.

The Use of Maximum Strength Measures as a Predictor of Rapid Force Production and Strength Endurance

2017 ◽  
Vol 22 (2) ◽  
pp. 48-59
Author(s):  
Roger O. Kollock ◽  
Bonnie Van Lunen ◽  
Stacie I. Ringleb ◽  
James Onate
Keyword(s):  
Lower Extremity ◽  
Force Production ◽  
Peak Force ◽  
Maximum Strength ◽  
Time Constraints ◽  
Sports Performance ◽  
Force Development ◽  
Lower Extremity Strength ◽  
Optimal Health ◽  
And Performance

The ability to produce force rapidly and to maintain it is essential to sports performance. Although rapid force production and endurance are indispensable characteristics of optimal health and performance, assessing these qualities of strength is difficult because of clinician time constraints. The purpose of this study was to determine if peak force is a predictor of rate of force production and strength endurance. The results indicated peak force is a predictor of rate of force development, but not strength endurance. Clinicians should assess both maximum strength and endurance to gain a more complete picture of lower extremity strength deficits.

scholarly journals Stretch-Shortening Cycle in Countermovement Jump: Exclusive Review of Force-Time Curve Variables in Eccentric and Concentric Phases

2017 ◽  
Author(s):  
Mahdi Cheraghi ◽  
Javad Sarvestan ◽  
Masoud Sebyani ◽  
Elham Shirzad
Keyword(s):  
Peak Power ◽  
Vertical Jump ◽  
Average Power ◽  
Peak Force ◽  
Jump Height ◽  
Time Curve ◽  
Jump Performance ◽  
Volleyball Players ◽  
Time Variables ◽  
Force Time

The importance of vertical jump in sport fields and rehabilitation is widely recognized. Furthermore, Force-Time variables of vertical jump are factors affecting jumping height. Exclusive review of each of this variables, in eccentric and concentric phases, can lead to a specific focus on them during jumping exercises. So, the aims of his study were to a) reviewing the relationship between force-time curve variables of eccentric and concentric phases with jump height and b) description of this variables in Iran national youth volleyball players society. This is an observational study. 12 elite volleyball player (Male, Iran national youth volleyball players, 17&plusmn;0.7 years) have participated in this study. Correlation between Force-Time variables - included peak force (PF), relative peak force (RPP), peak power (PP), average power (AP), relative peak power (RPP), and Modified Reactive Strength Index (MRSI) - in eccentric and concentric phases and ultimate jump height has been studied. Results showed that the average power (r=0.7) and relative peak force (r=0.75) of concentric phase and MRSI (r=0.83) have significant correlation with ultimate jump height (JH). Relative peak power and average power of concentric phase can massively effect Jump Height in sports like volleyball, which vertical jump is an integral part of them. Focus on both of these factors, which has been studied in this research, in training programs, can improve athlete jump performance significantly.

Effect of High-Speed Strength Training on Physical Performance in Young Soccer Players of Different Ages

2017 ◽  
Vol 31 (9) ◽  
pp. 2498-2508 ◽  
Author(s):  
David Rodríguez-Rosell ◽  
Felipe Franco-Márquez ◽  
Ricardo Mora-Custodio ◽  
Juan José González-Badillo
Keyword(s):  
Strength Training ◽  
Physical Performance ◽  
High Speed ◽  
Soccer Players ◽  
Different Ages

Relative Net Vertical Impulse Determines Jumping Performance

2011 ◽  
Vol 27 (3) ◽  
pp. 207-214 ◽  
Author(s):  
Tyler J. Kirby ◽  
Jeffrey M. McBride ◽  
Tracie L. Haines ◽  
Andrea M. Dayne
Keyword(s):  
Body Mass ◽  
Peak Power ◽  
Vertical Jump ◽  
Peak Force ◽  
Jump Height ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Velocity Peak ◽  
Force Peak ◽  
The Relationship

The purpose of this investigation was to determine the relationship between relative net vertical impulse and jump height in a countermovement jump and static jump performed to varying squat depths. Ten college-aged males with 2 years of jumping experience participated in this investigation (age: 23.3 ± 1.5 years; height: 176.7 ± 4.5 cm; body mass: 84.4 ± 10.1 kg). Subjects performed a series of static jumps and countermovement jumps in a randomized fashion to a depth of 0.15, 0.30, 0.45, 0.60, and 0.75 m and a self-selected depth (static jump depth = 0.38 ± 0.08 m, countermovement jump depth = 0.49 ± 0.06 m). During the concentric phase of each jump, peak force, peak velocity, peak power, jump height, and net vertical impulse were recorded and analyzed. Net vertical impulse was divided by body mass to produce relative net vertical impulse. Increasing squat depth corresponded to a decrease in peak force and an increase in jump height and relative net vertical impulse for both static jump and countermovement jump. Across all depths, relative net vertical impulse was statistically significantly correlated to jump height in the static jump (r= .9337,p< .0001, power = 1.000) and countermovement jump (r= .925,p< .0001, power = 1.000). Across all depths, peak force was negatively correlated to jump height in the static jump (r= –0.3947,p= .0018, power = 0.8831) and countermovement jump (r= –0.4080,p= .0012, power = 0.9050). These results indicate that relative net vertical impulse can be used to assess vertical jump performance, regardless of initial squat depth, and that peak force may not be the best measure to assess vertical jump performance.

scholarly journals Correlates of Physical Functioning and Performance Across the Spectrum of Kidney Function

2017 ◽  
Vol 27 (5) ◽  
pp. 579-596 ◽  
Author(s):  
E. Segura-Ortí ◽  
P. L. Gordon ◽  
J. W. Doyle ◽  
K. L. Johansen
Keyword(s):  
Physical Activity ◽  
Muscle Strength ◽  
Physical Function ◽  
Kidney Function ◽  
Physical Performance ◽  
Physical Functioning ◽  
Muscle Size ◽  
Thigh Muscle ◽  
Muscle Area ◽  
And Performance

The aim of this study was to determine the extent to which poor physical functioning, low participation in physical activity, and muscle atrophy observed among patients on hemodialysis are evident in the earlier stages of chronic kidney disease (CKD). We enrolled adults in three groups: no CKD, Stages 3 to 4 CKD, and hemodialysis. Outcomes measured were physical activity, muscle size, thigh muscle strength, physical performance, and self-reported physical function. Patients with CKD had muscle area intermediate between the no CKD and hemodialysis groups, but they had low levels of physical activity that were similar to the hemodialysis group. Physical activity and muscle size were significantly associated with all outcomes. Kidney function was not significantly associated with muscle strength or physical performance after adjustment for physical activity and muscle size. In conclusion, interventions aimed to increase muscle mass and energy expenditure might have an impact on improving physical function of CKD patients.

Sign in / Sign up

Export Citation Format

Share Document