The Relationship between Isokinetic Open and Closed Chain Lower Extremity Strength and Functional Performance

2000 ◽  
Vol 9 (1) ◽  
pp. 46-61 ◽  
Author(s):  
Rodney Negrete ◽  
Jay Brophy
Keyword(s):  
Lower Extremity ◽  
Functional Performance ◽  
Performance Testing ◽  
Knee Extension ◽  
Isokinetic Strength ◽  
Isokinetic Testing ◽  
Leg Press ◽  
Lower Extremity Strength ◽  
Closed Chain ◽  
Single Leg Squat

Objectives:To determine (1) correlations between isokinetic lower extremity strength and functional performance and (2) correlations among different modes of isokinetic testing.Design and Setting:A correlational design with 6 measures. A series of strength, power, and agility tests was performed at a hospital-based outpatient physical therapy clinic.Participants:A volunteer sample of 29 male and 31 female, college-age subjects participated.Measurements:All subjects were tested in the following isokinetic tests: reciprocal leg press, single-leg squat, and knee extension. Performance tests included single-leg hop and vertical jump and a speed/agility test.Results:Analysis showed isokinetic knee extension, leg press, and single-leg squat strength significantly correlated to all functional tests. There were significant correlations among the 3 different isokinetic strength measures, as well.Conclusions:These results suggest a significant relationship between lower extremity open and closed chain isokinetic strength and functional performance testing.

The Relationship between Lower Extremity Isokinetic Work and Single-Leg Functional Hop-Work Test

2006 ◽  
Vol 15 (2) ◽  
pp. 95-104 ◽  
Author(s):  
Robert English ◽  
Mary Brannock ◽  
Wan Ting Chik ◽  
Laura S. Eastwood ◽  
Tim Uhl
Keyword(s):  
Body Weight ◽  
Lower Extremity ◽  
Outcome Measures ◽  
Study Design ◽  
Peak Torque ◽  
Knee Extension ◽  
Isokinetic Strength ◽  
Total Work ◽  
Lower Extremity Strength ◽  
The Relationship

Context:Lower extremity functional testing assesses strength, power, and neuro-muscular control. There are only moderate correlations between distance hopped and isokinetic strength measures.Objective:Determine if incorporating body weight in the single-leg hop for distance increases the correlation to isokinetic measures.Study Design:Correlational study.Setting:Musculoskeletal laboratory.Participants:30 healthy college students; 15 men and 15 women; ages 18 to 30 years.Main Outcome Measures:Isokinetic average peak torque and total work of quadriceps and hamstrings and single-leg hop work and distance.Results:Significant correlations include hop work to total-work knee extension (r= .89), average peak-torque knee extension (r= .88), distance hopped to total-work knee extension (r= .56) and average peak-torque knee extension (r= .63). Correlations involving hop work were greater than distance hopped (P< .05).Conclusions:Use of body weight in the assessment of distance hopped provides better information about the patient’s lower extremity strength and ability than the distance hopped alone.

Lower Extremity Functional-Performance Testing, Part 3

2004 ◽  
Vol 9 (4) ◽  
pp. 32-35 ◽  
Author(s):  
Carl G. Mattacola ◽  
Joshua M. Drouin ◽  
Brian L. Riemann
Keyword(s):  
Lower Extremity ◽  
Functional Performance ◽  
Performance Testing

scholarly journals Lower Extremity Muscle Strength and Risk of Self-Reported Hip or Knee Osteoarthritis

2004 ◽  
Vol 1 (4) ◽  
pp. 321-330 ◽  
Author(s):  
Jennifer M. Hootman ◽  
Shannon FitzGerald ◽  
Carol A. Macera ◽  
Steven N. Blair
Keyword(s):  
Lower Extremity ◽  
Knee Osteoarthritis ◽  
Knee Extension ◽  
Quadriceps Strength ◽  
Community Dwelling ◽  
Leg Press ◽  
Knee Oa ◽  
Lower Extremity Muscle ◽  
Longitudinal Association

Purpose:The purpose of this study was to investigate the gender-specific longitudinal association between quadriceps strength and self-reported, physician-diagnosed hip or knee osteoarthritis (OA).Methods:Subjects were 3081 community-dwelling adults who were free of OA, joint symptoms and injuries, completed a maximum treadmill exercise test, had isokinetic knee extension and flexion and isotonic leg press strength measurements taken at baseline and returned at least one written follow-up survey. Multivariate logistic regression was used to estimate odds ratios and 95% confidence intervals.Results:Women with moderate or high isokinetic quadriceps strength had a significantly reduced risk (55% to 64%) of hip or knee OA. A similar, nonsignificant trend was noted among men. Moderate isotonic leg press strength was protective for hip or knee osteoarthritis among men only.Conclusions:These results suggest that quadriceps weakness is an independent and modifiable risk factor for lower extremity OA, particularly among women.

scholarly journals Predicting Functional Performance via Classification of Lower Extremity Strength in Older Adults with Exergame-Collected Data

2020 ◽  
Author(s):  
Hagen Becker ◽  
Augusto Garcia-Agundez ◽  
Philipp Niklas Müller ◽  
Thomas Tregel ◽  
André Miede ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Performance Monitoring ◽  
Functional Performance ◽  
Elderly Subjects ◽  
Non Invasive ◽  
Physical Independence ◽  
Lower Extremity Strength ◽  
Viable Solution ◽  
Via Classification

Abstract Objective: The goal of this article is to present and to evaluate a sensor-based functional performance monitoring system. The system consists of an array of Wii Balance Boards (WBB) and an exergame that estimates whether the player can maintain physical independence, comparing the results with the 30 Second Chair-Stand Test (30CST). Methods: Sixteen participants recruited at a nursing home performed the 30CST and then played the exergame described here as often as desired during a period of two weeks. For each session, features related to walking and standing on the WBBs while playing the exergame were collected. Different classifier algorithms were used to predict the result of the 30CST on a binary basis as able or unable to maintain physical independence. Results: By using a Logistic Model Tree, we achieved a maximum accuracy of 91% when estimating whether player’s 30CST scores were over or under a threshold of 12 points, Our findings suggest that predicting age- and sex-adjusted cutoff scores is feasible. Conclusion: An array of WBBs seems to be a viable solution to estimate lower extremity strength and thereby functional performance in a non-invasive and continuous manner. This study provides proof of concept supporting the use of exergames to identify and monitor elderly subjects at risk of losing physical independence.

Lower Extremity Functional Performance Testing, Part 2

2004 ◽  
Vol 9 (3) ◽  
pp. 49-51 ◽  
Author(s):  
Carl G. Mattacola ◽  
Joshua M. Drouin ◽  
Bryan L. Riemann
Keyword(s):  
Lower Extremity ◽  
Functional Performance ◽  
Performance Testing

scholarly journals Predicting functional performance via classification of lower extremity strength in older adults with exergame-collected data

2020 ◽  
Vol 17 (1) ◽  
Author(s):  
Hagen Becker ◽  
Augusto Garcia-Agundez ◽  
Philipp Niklas Müller ◽  
Thomas Tregel ◽  
André Miede ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Performance Monitoring ◽  
Functional Performance ◽  
Elderly Subjects ◽  
Non Invasive ◽  
Physical Independence ◽  
Lower Extremity Strength ◽  
Viable Solution ◽  
Via Classification

Abstract Objective The goal of this article is to present and to evaluate a sensor-based functional performance monitoring system. The system consists of an array of Wii Balance Boards (WBB) and an exergame that estimates whether the player can maintain physical independence, comparing the results with the 30 s Chair-Stand Test (30CST). Methods Sixteen participants recruited at a nursing home performed the 30CST and then played the exergame described here as often as desired during a period of 2 weeks. For each session, features related to walking and standing on the WBBs while playing the exergame were collected. Different classifier algorithms were used to predict the result of the 30CST on a binary basis as able or unable to maintain physical independence. Results By using a Logistic Model Tree, we achieved a maximum accuracy of 91% when estimating whether player’s 30CST scores were over or under a threshold of 12 points, our findings suggest that predicting age- and sex-adjusted cutoff scores is feasible. Conclusion An array of WBBs seems to be a viable solution to estimate lower extremity strength and thereby functional performance in a non-invasive and continuous manner. This study provides proof of concept supporting the use of exergames to identify and monitor elderly subjects at risk of losing physical independence.

Profiling Isokinetic Strength by Leg Preference and Position in Rugby Union Athletes

2016 ◽  
Vol 11 (4) ◽  
pp. 500-507 ◽  
Author(s):  
Scott R. Brown ◽  
Matt Brughelli ◽  
Lee A. Bridgeman
Keyword(s):  
Lower Extremity ◽  
Peak Torque ◽  
Knee Extension ◽  
Rugby Union ◽  
Lower Extremity Injury ◽  
Cross Sectional ◽  
Hip Strength ◽  
Lower Extremity Muscle ◽  
Lower Extremity Strength ◽  
Sectional Analysis

Context:Muscle imbalances aid in the identification of athletes at risk for lower-extremity injury. Little is known regarding the influence that leg preference or playing position may have on lower-extremity muscle strength and asymmetry.Purpose:To investigate lower-extremity strength profiles in rugby union athletes and compare isokinetic knee- and hip-strength variables between legs and positions.Methods:Thirty male academy rugby union athletes, separated into forwards (n = 15) and backs (n = 15), participated in this cross-sectional analysis. Isokinetic dynamometry was used to evaluate peak torque, angle of peak torque, and strength ratios of the preferred and nonpreferred legs during seated knee extension/flexion and supine hip extension/flexion at 60°/s.Results:Backs were older (ES = 1.6) but smaller in stature (ES = –0.47) and body mass (ES = –1.3) than the forwards. The nonpreferred leg was weaker than the preferred leg for forwards during extension (ES = –0.37) and flexion (ES = –0.21) actions and for backs during extension (ES = –0.28) actions. Backs were weaker at the knee than forwards in the preferred leg during extension (ES = –0.50) and flexion (ES = –0.66) actions. No differences were observed in strength ratios between legs or positions. Backs produced peak torque at longer muscle lengths in both legs at the knee (ES = –0.93 to –0.94) and hip (ES = –0.84 to –1.17) than the forwards.Conclusions:In this sample of male academy rugby union athletes, the preferred leg and forwards displayed superior strength compared with the nonpreferred leg and backs. These findings highlight the importance of individualized athletic assessments to detect crucial strength differences in male rugby union athletes.

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