The Effects of Limited Range of Motion Isokinetic Knee Extensor Training on Isometric Strength Development Inside and Outside of the Trained Range of Motion PDF Download
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Author: Jennifer L. Donner
Publisher:
ISBN:
Category : Isokinetic exercise
Languages : en
Pages : 68
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Book Description
Abstract: The purpose of this study was to determine the effects of limited range of motion (ROM) isokinetic knee extensor exercise on isometric strength development inside and outside the trained ROM. Four male and 18 female volunteers between the ages of 20 and 48 years were randomly assigned to one of two groups. The experimental group trained the knee extensors isokinetically on the KINCOM from 45 to 0 degrees of knee flexion three times a week for five weeks. The control group did not train. Both groups were pretested and posttested on the KINCOM for isometric knee extensor peak torque at 15, 25, 35, 55, 65 and 75 degrees of knee flexion. One half of the subjects in each group was tested at each angle in ascending order, while the other half was tested in descending order. The two orders of testing were randomly assigned and balanced over subjects with a matching procedure. Repeated-measures ANOVA with one between groups factor was used to determine if significant differences existed between the groups. Tukey's Honestly Significantly Different test was used to make pairwise comparisons between group means at each angle. Upon statistical analysis it was determined that no significant differences existed between the groups at each angle of measurement except at 75 degrees of knee flexion (p
Author: Jennifer L. Donner
Publisher:
ISBN:
Category : Isokinetic exercise
Languages : en
Pages : 68
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Book Description
Abstract: The purpose of this study was to determine the effects of limited range of motion (ROM) isokinetic knee extensor exercise on isometric strength development inside and outside the trained ROM. Four male and 18 female volunteers between the ages of 20 and 48 years were randomly assigned to one of two groups. The experimental group trained the knee extensors isokinetically on the KINCOM from 45 to 0 degrees of knee flexion three times a week for five weeks. The control group did not train. Both groups were pretested and posttested on the KINCOM for isometric knee extensor peak torque at 15, 25, 35, 55, 65 and 75 degrees of knee flexion. One half of the subjects in each group was tested at each angle in ascending order, while the other half was tested in descending order. The two orders of testing were randomly assigned and balanced over subjects with a matching procedure. Repeated-measures ANOVA with one between groups factor was used to determine if significant differences existed between the groups. Tukey's Honestly Significantly Different test was used to make pairwise comparisons between group means at each angle. Upon statistical analysis it was determined that no significant differences existed between the groups at each angle of measurement except at 75 degrees of knee flexion (p
Author: John William Halbach
Publisher:
ISBN:
Category : Joints
Languages : en
Pages : 168
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Book Description
This study examined the effects of a 6 wk limited range of motion (short quadricep arcs) strength training program on full range of motion strength of the knee extensors. Eighteen Ss, 9 in the control group and 9 in the experimental group, from the University of Wisconsin-La Crosse physical education and physical therapy classes participated in the study.
Author: Roger M. Zabik
Publisher:
ISBN:
Category : Isometric exercise
Languages : en
Pages : 246
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 110
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Book Description
Skeletal muscle is a major active mechanism of impact force attenuation in human movement. During the landing phase impact attenuation is achieved through eccentric contraction of the muscles of the lower extremity. However, few studies have investigated the effects of knee strength, especially eccentric strength, on impact attenuation during landing. Therefore the relationship was assessed in fourteen healthy, male volunteers. Seven NCAA Division I College football players (TRAINED) and seven recreationally active university students with limited sport training or competitive sport background (REC) participated in two testing sessions. Isokinetic testing of the knee extensor and flexor muscles was performed concentrically at 60 and 180 degree·sec−1, and eccentrically at 60 degree·sec−1. 3D kinematic and ground reaction force (GRF) data were collected during drop landings from heights of 40, 60cm and 100% of each individuals maximum jump height. The TRAINED had greater concentric strength, vertical jump height, but no significant differences existed in the eccentric strength (336 vs 340 N.m/kg) between the groups. The TRAINED had marginally greater peak GRFs (2.7 & 3.5 BW vs 2.0 & 2.7 BW for 40 and 60 cm, p=0.051) and significantly less time to the peak (0.048 & 0.043 s vs 0.060 & 0.053) compared to the REC in drop landing. The TRAINED used less but non-significant knee flexion range of motion ( -60.7 & -54.1 degree vs -62.7 & -69.6 degree) during drop landing than the REC. There were high, positive and significant correlations between the peak eccentric knee extensor torque and time to the first and second peak GRF. Despite all their training the results did not find any significant differences in eccentric strength of the TRAINED subjects in comparison to their REC counterparts. The TRAINED subjects adopted a stiffer landing strategy to deal effectively with high impact loading during landing. Future research is warranted in investigating impact attenuation in landing of participants with significantly different eccentric strength.
Author: Laurel Joan Beebe
Publisher:
ISBN:
Category : Exercise
Languages : en
Pages : 154
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Author: Daniel Romero
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Strength is one characteristic that most athletes focus on improving as it is a critical element for success. It is believed that some micro-tearing of the muscle tissue occurs daily in routine activities and during regular exercise. Any restriction or imbalance within the musculoskeletal structure can affect optimal range of motion which then can affect the quality of force production, force application, and movement efficacy. Nontraditional treatments are beginning to be investigated to examine their effects on strength and a few techniques are slowly gaining popularity are the Graston Technique (GT) and Whole Body Vibration (WBV). Clinicians might apply the GT before practice or competition to break down adhesions to allow the muscle to function freely or use WBV to stimulate the neuromuscular system. However, the use of the GT or WBV may possibly leave the athlete susceptible to injury if strength is diminished in the process. PURPOSE: The purpose of this study is to address the potential acute effects of the GT and WBV on peak isokinetic torque and fatigue of the quadriceps during maximal voluntary contraction. The secondary purpose is to compare the individual effects between the GT and WBV on strength and fatigue following an acute exercise protocol. METHODS: Subjects were randomly selected into three groups: the GT, WBV and control. Each subject completed their group protocol a week after the pre-test. Peak isokinetic torque, total work and work fatigue values were collected pre-test and post-test using the Thorstennson protocol on the Biodex dynamometer 4.0. Following data collection, independent sample t-tests and a one-way ANOVA were performed on SPSS Statistics to analyze the data. RESULTS: Peak isokinetic torque and work fatigue decreased following each intervention. There was no significant difference between pre-test and post-test or between groups. Total work only increased in the GT but not significantly when compared to the WBV and control group. CONCLUSION: Based on the results, it is safe to assume that the GT and WBV is not better or worse than resting for 5 minutes before practice or competition when it comes to strength and fatigue.
Author: James R. Andrews
Publisher: Elsevier Health Sciences
ISBN: 0702036056
Category : Medical
Languages : en
Pages : 897
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Book Description
The latest edition of this in-depth look at athletic injuries of the shoulder has been updated to feature 16 new chapters, additional illustrations and algorithms, an added focus on arthroscopic treatments, and pearls that highlight key information. Additional contributing authors give you a fresh spin on new and old topics from rehabilitation exercises to special coverage of female athletes, pediatrics, and golfers. This book offers coverage of arthroscopy, total joint replacement, instability, football, tennis, swimming, and gymnastic injuries, rotator cuff injuries, and much, much more! The large range of topics covered in this text ensures that it's a great resource for orthopaedists, physical therapists, athletic trainers, and primary care physicians. - Presents a multidisciplinary approach to the care of the shoulder, combining contributions from the leaders in the field of orthopedic surgery, physical therapy, and athletic training. - Demonstrates which exercises your patients should perform in order to decrease their chance of injury or increase strength following an injury through illustrated exercises for rehabilitation and injury prevention. - Illustrates how the shoulder is affected during activity of certain sports with a variety of tables and graphs. - Covers a large range of topics including all shoulder injuries to be sufficiently comprehensive for both orthopaedists and physical therapists/athletic trainers.Features 16 new chapters, including Internal Impingement, Bankarts: Open vs. Arthroscopy, Adhesive Capsulitis of the Shoulder, Cervicogenic Shoulder Pain, Proprioception: Testing and Treatment, and more. - Details current surgical and rehabilitation information for all aspects of shoulder pathology to keep you up-to-date. - Organizes topics into different sections on anatomy, biomechanics, surgery, and rehabilitation for ease of reference.
Author: Peter Sisco
Publisher: McGraw Hill Professional
ISBN: 9780809230716
Category : Health & Fitness
Languages : en
Pages : 260
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Book Description
Bodybuilding experts Peter Sisco and John Little present a revolutionary new system for building maximum muscle in a minimum amount of time. Power Factor Training emphasizes very heavy overloading of the musculature and long rest periods between workouts, resulting in amazing gains in size and strength. This astounding guide details the proven physiological principles of the program, answers specific training questions, and outlines a concise workout schedule that is sure to benefit beginning, intermediate, and advanced bodybuilders.
Author: Erin Elizabeth Simunds
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Book Description
Author: Tim Ogletree
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 74
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Book Description
