scholarly journals Eccentric knee flexor strength profiles of 341 elite male academy and senior Gaelic football players: Do body mass and previous hamstring injury impact performance?

2018 ◽  
Vol 31 ◽  
pp. 68-74 ◽  
Author(s):  
Mark Roe ◽  
Shane Malone ◽  
Eamonn Delahunt ◽  
Kieran Collins ◽  
Conor Gissane ◽  
...  
Keyword(s):  
Body Mass ◽  
Hamstring Injury ◽  
Football Players ◽  
Impact Performance ◽  
Knee Flexor ◽  
Flexor Strength

The Effect of Body Mass on Eccentric Knee-Flexor Strength Assessed With an Instrumented Nordic Hamstring Device (Nordbord) in Football Players

2016 ◽  
Vol 11 (6) ◽  
pp. 721-726 ◽  
Author(s):  
Martin Buchheit ◽  
Yannick Cholley ◽  
Mark Nagel ◽  
Nicholas Poulos
Keyword(s):  
Body Mass ◽  
Soccer Players ◽  
Football Players ◽  
Knee Flexor ◽  
Professional Soccer ◽  
Australian Football League ◽  
Training History ◽  
Absolute Strength ◽  
Australian Football ◽  
Flexor Strength

Purpose:To examine the effect of body mass (BM) on eccentric knee-flexor strength using the Nordbord and offer simple guidelines to control for the effect of BM on knee-flexor strength.Methods:Data from 81 soccer players (U17, U19, U21, senior 4th French division, and professionals) and 41 Australian Football League (AFL) players were used for analysis. They all performed 1 set of 3 maximal repetitions of the bilateral Nordic hamstring exercise, with the greatest strength measure used for analysis. The main regression equation obtained from the overall sample was used to predict eccentric knee-flexor strength from a given BM (moderate TEE, 22%). Individual deviations from the BM-predicted score were used as a BM-free index of eccentric knee- flexor strength.Results:There was a large (r = .55, 90% confidence limits .42;.64) correlation between eccentric knee-flexor strength and BM. Heavier and older players (professionals, 4th French division, and AFL) outperformed their lighter and younger (U17–U21) counterparts, with the soccer professionals presenting the highest absolute strength. Professional soccer players were the only ones to show strength values likely slightly greater than those expected for their BM.Conclusions:Eccentric knee-flexor strength, as assessed with the Nordbord, is largely BM-dependent. To control for this effect, practitioners may compare actual test performances with the expected strength for a given BM, using the following predictive equation: Eccentric strength (N) = 4 × BM (kg) + 26.1. Professional soccer players with specific knee-flexor-training history and enhanced neuromuscular performance may show higher than expected values.

Eccentric knee flexor strength of professional football players with and without hamstring injury in the prior season

2020 ◽  
pp. 1-9 ◽  
Author(s):  
João Breno Ribeiro-Alvares ◽  
Gabriel Dos Santos Oliveira ◽  
Felipe Xavier De Lima-E-Silva ◽  
Bruno Manfredini Baroni
Keyword(s):  
Hamstring Injury ◽  
Football Players ◽  
Professional Football ◽  
Knee Flexor ◽  
Flexor Strength

scholarly journals Association between eccentric knee flexor strength and hamstring injury risk in 185 elite Gaelic football players

2020 ◽  
Vol 30 (3) ◽  
pp. 515-522 ◽  
Author(s):  
Mark Roe ◽  
Eamonn Delahunt ◽  
Malachy McHugh ◽  
Conor Gissane ◽  
Shane Malone ◽  
...  
Keyword(s):  
Injury Risk ◽  
Hamstring Injury ◽  
Football Players ◽  
Knee Flexor ◽  
Flexor Strength

Post-match recovery of eccentric knee flexor strength in male professional football players

2021 ◽  
Vol 47 ◽  
pp. 140-146
Author(s):  
César Augusto Bueno ◽  
João Breno de Araujo Ribeiro-Alvares ◽  
Gabriel dos Santos Oliveira ◽  
Rafael Grazioli ◽  
Filipe Veeck ◽  
...  
Keyword(s):  
Football Players ◽  
Professional Football ◽  
Knee Flexor ◽  
Flexor Strength

scholarly journals The Effects of a Soccer-Specific Fitness Test on Eccentric Knee Flexor Strength

2020 ◽  
pp. 1-5
Author(s):  
Christopher Michael Brogden ◽  
Lewis Gough ◽  
Adam Kelly
Keyword(s):  
Outcome Measures ◽  
Body Mass ◽  
Assessment Method ◽  
Peak Force ◽  
Soccer Players ◽  
Youth Soccer ◽  
Knee Flexor ◽  
Fitness Test ◽  
Hamstring Injuries ◽  
Flexor Strength

Context: Physiological fitness testing, such as the Yo-Yo Intermittent Recovery Test (YYIR) is a key requirement of the Elite Player Performance Plan, introduced by the English Premier League. Eccentric hamstring strength has been identified as a risk factor for hamstring injuries in soccer players, with fatigue highlighted to further exasperate this issue. Objective: The aim of the current study was to examine the effect of the YYIR level 1 (YYIR1) on eccentric knee flexor strength assessed using the NordBord in youth soccer players. Design: Experimental design. Setting: Soccer club academy. Participants: A total of 67 male academy soccer players (age = 16.58 [0.57] y; height = 175.45 [5.85] cm; mass = 66.30 [8.21] kg) volunteered to participate in the current study during the English competitive soccer season. Main Outcome Measures: Participants conducted eccentric hamstring strength assessments using the NordBord prior to and immediately postcompletion of the YYIR1, with outcome measures of peak force and peak force relative to body mass recorded. Results: Paired t tests highlighted increased absolute eccentric knee flexor strength values (P < .001) immediately post-YYIR1 for both the dominant and nondominant limbs, with the same trend (P < .001) observed for eccentric strength relative to body mass. Conclusions: The results of this study indicate that the YYIR1 does not induce eccentric knee flexor fatigue and as such is not a valid assessment method to assess the effects of fatigue on hamstring function. However, results do suggest that the NordBord may be considered a viable and more accessible alternative to detect pre–post fitness test/fatigue protocol differences in eccentric knee flexor peak strength while working in the field.

Knee flexor strength, rate of torque development and flexibility in women and men with patellofemoral pain: Relationship with pain and the single leg bridge test

2021 ◽  
Author(s):  
Matheus Henrique Maiolini Ducatti ◽  
Marina Cabral Waiteman ◽  
Ana Flávia Balotari Botta ◽  
Helder dos Santos Lopes ◽  
Neal Robert Glaviano ◽  
...  
Keyword(s):  
Patellofemoral Pain ◽  
Knee Flexor ◽  
Rate Of Torque Development ◽  
Torque Development ◽  
Flexor Strength

Dietary, Anthropometric, Blood-Lipid, and Performance Patterns of American College Football Players during 8 Weeks of Training

2012 ◽  
Vol 22 (6) ◽  
pp. 444-451 ◽  
Author(s):  
Rochelle D. Kirwan ◽  
Lindsay K. Kordick ◽  
Shane McFarland ◽  
Denver Lancaster ◽  
Kristine Clark ◽  
...  
Keyword(s):  
Body Mass ◽  
Performance Measures ◽  
Fat Mass ◽  
Blood Lipid ◽  
Low Density Lipoproteins ◽  
Football Players ◽  
Low Density ◽  
Early Season ◽  
Performance Patterns ◽  
And Performance

Purpose:The purpose of this study was to determine the dietary, anthropometric, blood-lipid, and performance patterns of university-level American football players attempting to increase body mass during 8 wk of training.Methods:Three-day diet records, body composition (DEXA scan), blood lipids, and performance measures were collected in redshirt football players (N = 15, age 18.5 ± 0.6 yr) early season and after 8 wk of in-season training.Results:There was an increase (p < .05) from early-season to postseason testing for reported energy (+45%), carbohydrate (+82%), and protein (+29%) intakes and no change in the intake of fat. Fat intake was 41% of energy at the early-season test and 32% of energy at the postseason test. Increases (p < .05 for all) in performance measures, lean mass (70.5 ± 7.7–71.8 ± 7.7 kg), fat mass (15.9 ± 6.2–17.3 ± 6.8 kg), plasma total cholesterol (193.5 ± 32.4–222.6 ± 40.0 mg/dl), and low-density lipoproteins (LDL; 92.7 ± 32.7–124.5 ± 34.7 mg/dl) were measured. No changes were measured in triglycerides, very-low-density lipoproteins, or high-density lipoproteins.Conclusion:Increases in strength, power, speed, total body mass, muscle mass, and fat mass were measured. Cholesterol and LDL levels increased during the study to levels associated with higher risk for cardiovascular disease. It is possible that this is a temporary phenomenon, but it is cause for concern and an indication that dietary education to promote weight gain in a manner less likely to adversely affect the lipid profile is warranted.

Sign in / Sign up

Export Citation Format

Share Document