scholarly journals The Effects of Successive Soccer Matches on the Internal Match Load, Stress Tolerance, Salivary Cortisol and Jumping Performance in Youth Soccer Players

2021 ◽  
Vol 80 (1) ◽  
pp. 173-184
Author(s):  
Julio Cesar Barbosa de Lima Pinto ◽  
Romerito Sóstenes Canuto de Oliveira ◽  
Nicole Leite Galvão-Coelho ◽  
Raissa Nóbrega de Almeida ◽  
Alexandre Moreira ◽  
...  
Keyword(s):  
Stress Tolerance ◽  
Salivary Cortisol ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Soccer Players ◽  
Enzyme Linked Immunosorbent Assay ◽  
Jump Height ◽  
Youth Soccer ◽  
Jumping Performance ◽  
Vertical Jump Height

Abstract The study aim was to analyze the effects of successive matches on the internal match load, stress tolerance, salivary cortisol concentration and countermovement vertical jump height in twelve youth soccer players (16.6 ± 0.5 yr; 175 ± 8 cm; 65 ± 8 kg) who performed four official matches within a four day-period with a 24-h recovery interval between the matches. The internal match load, monotony index and competitive strain, as well as stress tolerance were examined. Saliva samples were collected and countermovement vertical jump height was assessed 60 min pre and 30 min post each match; delta of salivary cortisol and countermovement vertical jump height for each match were analyzed. Salivary cortisol was analyzed using an enzyme-linked immunosorbent assay. The results of ANOVA with repeated measures showed no differences between matches for the internal match load (p > 0.05). The scores of the monotony index and competitive strain were 4.3 (±2.3) and 8104 (±6795) arbitrary units, respectively. There was no difference for stress tolerance between matches (p > 0.05). Delta values of salivary cortisol were not different among the assessed matches (F(3,33) = 1.397, p = 0.351, η2: 0.09); however, delta of countermovement vertical jump height decreased from match 1 to match 4 (F(3,33) = 8.64, p < 0.001, η2: 0.44). The current findings suggest that participating in four successive matches, with 24-h of recovery in between, may not lead to changes in stress tolerance and salivary cortisol of youth players, but it may induce a decrease in players’ jumping performance after the fourth match.

scholarly journals Strength and Jump Biomechanics of Elite and Recreational Female Youth Soccer Players

2012 ◽  
Vol 47 (6) ◽  
pp. 609-615 ◽  
Author(s):  
Sara P. Chrisman ◽  
John W. O'Kane ◽  
Nayak L. Polissar ◽  
Allan F. Tencer ◽  
Christopher D. Mack ◽  
...  
Keyword(s):  
Risk Factors ◽  
Vertical Jump ◽  
Soccer Players ◽  
Jump Height ◽  
Female Youth ◽  
Youth Soccer ◽  
Youth Athletes ◽  
Knee Strength ◽  
Vertical Jump Height ◽  
Flexion Extension

Context Most researchers investigating soccer injuries have studied elite athletes because they have greater athletic-exposure hours than other athletes, but most youth participate at the recreational level. If risk factors for injury vary by soccer level, then recommendations generated using research with elite youth soccer players might not generalize to recreational players. Objective To examine injury risk factors of strength and jump biomechanics by soccer level in female youth athletes and to determine whether research recommendations based on elite youth athletes could be generalized to recreational players. Design Cross-sectional study. Setting Seattle Youth Soccer Association. Patients or Other Participants Female soccer players (N = 92) aged 11 to 14 years were recruited from 4 randomly selected elite (n = 50; age = 12.5 years, 95% confidence interval [95% CI]) = 12.3, 12.8 years; height = 157.8 cm, 95% CI = 155.2, 160.3 cm; mass = 49.9 kg, 95% CI = 47.3, 52.6 kg) and 4 randomly selected recreational (n = 42; age = 13.2 years, 95% CI = 13.0, 13.5 years; height = 161.1 cm, 95% CI = 159.2, 163.1 cm; mass = 50.6 kg, 95% CI = 48.3, 53.0 kg) soccer teams. Main Outcome Measure(s) Players completed a questionnaire about demographics, history of previous injury, and soccer experience. Physical therapists used dynamometry to measure hip strength (abduction, adduction, extension, flexion) and knee strength (flexion, extension) and Sportsmetrics to measure vertical jump height and jump biomechanics. We compared all measurements by soccer level using linear regression to adjust for age and mass. Results Elite players were similar to recreational players in all measures of hip and knee strength, vertical jump height, and normalized knee separation (a valgus estimate generated using Sportsmetrics). Conclusions Female elite youth players and recreational players had similar lower extremity strength and jump biomechanics. This suggests that recommendations generated from research with elite youth soccer players could be generalized to recreational players.

Creatine Supplementation in Young Soccer Players

2004 ◽  
Vol 14 (1) ◽  
pp. 95-103 ◽  
Author(s):  
Sergej M. Ostojic
Keyword(s):  
Vertical Jump ◽  
Creatine Supplementation ◽  
Creatine Monohydrate ◽  
Soccer Players ◽  
Jump Height ◽  
Endurance Test ◽  
Power Test ◽  
Vertical Jump Height ◽  
Placebo Trial ◽  
Specific Skill

The purpose of this study was to examine the effects of acute creatine-monohydrate supplementation on soccer-specific performance in young soccer players. Twenty young male soccer players (16.6 ± 1.9 years) participated in the study and were matched and allocated to 2 randomly assigned trials: ingesting creatine-monohydrate supplement (3 × 10-g doses) or placebo for 7 days. Before and after the supplementation protocol, each subject underwent a series of soccer-specific skill tests: dribble test, sprint-power test, endurance test, and vertical jump test. Specific dribble test times improved significantly in the creatine group (13.0 ± 1.5 vs. 10.2 ± 1.8 s; p < .05) after supplementation protocol. Sprint-power test times were significantly improved after creatine-monohydrate supplementation (2.7 ± 0.4 vs. 2.2 ± 0.5 s; p < .05) as well as vertical jump height (49.2 ± 5.9 vs. 55.1 ± 6.3 cm; p < .05) in creatine trial. Furthermore, dribble and power test times, along with vertical jump height, were superior in creatine versus placebo trial (p < .05) at post-supplementation performance. There were no changes in specific endurance test results within or between trials (p > .05). There were no between-trial differences in the placebo trial (p > .05). The main finding of the present study indicates that supplementation with creatine in young soccer players improved soccer-specific skill performance compared with ingestion of placebo.

scholarly journals Effect of 6 Weeks of Preseason Concurrent Muscular Strength and Plyometric Training in Professional Soccer Players

2014 ◽  
Vol 48 (1) ◽  
pp. 27-32 ◽  
Author(s):  
Shweta Shenoy ◽  
Amrinder Singh ◽  
Kartik Kulkarni ◽  
Jaspal Sandhu
Keyword(s):  
Muscular Strength ◽  
Vertical Jump ◽  
High Load ◽  
Soccer Players ◽  
Jump Height ◽  
Plyometric Training ◽  
Recovery Test ◽  
Professional Soccer ◽  
Vertical Jump Height ◽  
Soccer Training

ABSTRACT The purpose of this study was to compare the effects of combined strength and plyometric training with soccer training alone on strength and power-related measurements in professional soccer players. Subjects were randomly divided into two groups: group EG (n = 14) performed heavy resistance and plyometric training thrice a week during 6 weeks training period in addition to 6-8 soccer sessions per week; group CG (n = 14) performed 6-8 soccer sessions a week. EG significantly increased (p < 0.05) ball shooting speed and agility but showed no changes in body mass. Within-subject improvement was significantly higher (p < 0.01) in the EG compared with the CG for vertical jump height, 10 and 30 m sprint times, distances covered in the Yo-Yo intermittent recovery test. Plyometric can be concurrently performed with high load muscular strength training to enhance soccer players’ explosive performances. How to cite this article Singh A, Kulkarni K, Shenoy S, Sandhu J. Effect of 6 Weeks of Preseason Concurrent Muscular Strength and Plyometric Training in Professional Soccer Players. J Postgrad Med Edu Res 2014;48(1):27-32.

A Comparative Analysis of Selected Ankle Orthoses during Functional Tasks

2001 ◽  
Vol 10 (3) ◽  
pp. 174-183 ◽  
Author(s):  
James A. Yaggie ◽  
Stephen J. Kinzey
Keyword(s):  
Outcome Measures ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Plantar Flexion ◽  
Jump Height ◽  
Vertical Jump Height ◽  
Run Time ◽  
Joint Range ◽  
Shuttle Run ◽  
Ankle Bracing

Context:Ankle bracing has been used for many years in an attempt to prevent lateral ligamentous injuries of the ankle by restricting joint range of motion (ROM).Objective:To examine the influence of ankle bracing on ROM and sport-related performance.Design:Repeated measures.Setting:Biomechanics laboratory.Participants:30 volunteers. None reported ankle trauma within 2 years preceding the study or had other orthopedic conditions that would have affected physical performance.Intervention:Three brace conditions (McDavid A101™, Perform-8™ Lateral Stabilizer) were assessed during performance of the vertical jump and shuttle run.Main Outcome Measures:shuttle-run time, vertical jump height, inversion, and plantar flexion ROM.Results:Both braces restricted plantar flexion and inversion ROM and caused no change in shuttle-run time or vertical jump height.Conclusions:Our results indicate that bracing the ankle joint increases external lateral support to the joint without significantly restricting functional ability.

scholarly journals Physical Performance Improves With Time and a Functional Knee Brace in Athletes After ACL Reconstruction

2020 ◽  
Vol 8 (8) ◽  
pp. 232596712094425
Author(s):  
Laura C. Dickerson ◽  
Alexander T. Peebles ◽  
Joseph T. Moskal ◽  
Thomas K. Miller ◽  
Robin M. Queen
Keyword(s):  
Physical Performance ◽  
Performance Measures ◽  
Repeated Measures ◽  
Vertical Jump ◽  
Performance Testing ◽  
Performance Measure ◽  
Jump Height ◽  
Knee Brace ◽  
Vertical Jump Height ◽  
The Impact

Background: Athletes who return to sport (RTS) after anterior cruciate ligament reconstruction (ACLR) often have reduced physical performance and a high reinjury rate. Additionally, it is currently unclear how physical performance measures can change during the RTS transition and with the use of a functional knee brace. Purpose/Hypothesis: The purpose of this study was to examine the effects of time since surgery (at RTS and 3 months after RTS) and of wearing a brace on physical performance in patients who have undergone ACLR. We hypothesized that physical performance measures would improve with time and would not be affected by brace condition. Study Design: Controlled laboratory study. Methods: A total of 28 patients who underwent ACLR (9 males, 19 females) completed physical performance testing both after being released for RTS and 3 months later. Physical performance tests included the modified agility t test (MAT) and vertical jump height, which were completed with and without a knee brace. A repeated-measures analysis of variance determined the effect of time and bracing on performance measures. Results: The impact of the knee brace was different at the 2 time points for the MAT side shuffle ( P = .047). Wearing a functional knee brace did not affect any other physical performance measure. MAT times improved for total time ( P < .001) and backpedal ( P < .001), and vertical jump height increased ( P = .002) in the 3 months after RTS. Conclusion: The present study showed that physical performance measures of agility and vertical jump height improved in the first 3 months after RTS. This study also showed that wearing a knee brace did not hinder physical performance. Clinical Relevance: Wearing a functional knee brace does not affect physical performance, and therefore a brace could be worn during the RTS transition without concern. Additionally, physical performance measures may still improve 3 months past traditional RTS, therefore justifying delayed RTS.

Is Change Of Direction Ability Related To Vertical Jump Height In Female Soccer Players?

2014 ◽  
Vol 46 ◽  
pp. 959
Author(s):  
Chieh-Ying Chiang ◽  
Kimitake Sato ◽  
Christopher A. Bailey ◽  
Christopher J. Sole ◽  
Timothy J. Suchomel ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Soccer Players ◽  
Jump Height ◽  
Change Of Direction ◽  
Vertical Jump Height

scholarly journals Effects of Percutaneous Electrical Nerve Stimulation on Countermovement Jump and Squat Performance Speed in Male Soccer Players: A Pilot Randomized Clinical Trial

2021 ◽  
Vol 10 (4) ◽  
pp. 690
Author(s):  
Gracia María Gallego-Sendarrubias ◽  
José Luis Arias-Buría ◽  
Edurne Úbeda-D’Ocasar ◽  
Juan Pablo Hervás-Pérez ◽  
Manuel Antonio Rubio-Palomino ◽  
...  
Keyword(s):  
Training Program ◽  
Nerve Stimulation ◽  
Vertical Jump ◽  
Sport Performance ◽  
Flight Time ◽  
Soccer Players ◽  
Jump Height ◽  
Countermovement Jump ◽  
Electrical Nerve Stimulation ◽  
Vertical Jump Height

It has been suggested that Percutaneous Electrical Nerve Stimulation (PENS) can increase muscle strength. No previous study has investigated changes in performance in semiprofessional soccer players. This study compares the effects of adding two sessions of PENS to a training program versus the single training program over sport performance attributes (e.g., jump height and squat speed) in healthy soccer players. A cluster-randomized controlled trial was conducted on twenty-three semiprofessional soccer players who were randomized into an experimental (PENS + training program) or control (single training program) group. The training program consisted of endurance and strength exercises separated by 15-min recovery period, three times/week. The experimental group received two single sessions of PENS one-week apart. Flight time and vertical jump height during the countermovement jump and squat performance speed were assessed before and after each session, and 30 days after the last session. Male soccer players receiving the PENS intervention before the training session experienced greater increases in the flight time, and therefore, in vertical jump height, after both sessions, but not one month after than those who did not receive the PENS intervention (F = 4.289, p = 0.003, η 2 p: 0.170). Similarly, soccer players receiving the PENS intervention experienced a greater increase in the squat performance speed after the second session, but not after the first session or one month after (F = 7.947, p < 0.001, η 2 p: 0.275). Adding two sessions of ultrasound-guided PENS before a training strength program improves countermovement jump and squat performance speed in soccer players.

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