Examination of muscle activity with an elastic hamstring assistance device

Bellar, David; LeBlanc, Nina R.; Judge, Lawrence W.

doi:10.4103/2394-2010.143321

Cited by 4 publications

(6 citation statements)

References 21 publications

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“…The hamstring muscle group is composed of three muscles: the biceps femoris, the semitendinosus and the semimembranosus. Composed of mostly Type II muscle fibers, hamstring muscles produce motion in both the knee and hip joints ( Bellar et al, 2014 ; Worrel and Perrin, 1992 ). The long head of the biceps femoris is responsible for hip extension and knee flexion, while the short head produces knee flexion.…”

Section: Introductionmentioning

confidence: 99%

“…Hamstring injuries are thought to occur during the terminal phase of the gait cycle due to large eccentric forces necessary to arrest the swing of the lower leg in preparation for ground contact ( Bellar et al, 2014 ). The most common injury was hamstring strain, which was prevalently found among those participating in speed-strength events that included sprints ( Makaruk et al, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

“…Eccentric muscle contractions were known to cause most muscle damage when compared to other types of contractions ( Bellar and Judge, 2014 ; Bryner et al, 2004 ; Eston et al, 1995 ; Higashihara et al, 2010 ). Bird et al (2014) noted that it was common for people to suffer from muscle soreness in the 24 to 72 h period following bouts of an exercise that was unfamiliar.…”

Section: Introductionmentioning

confidence: 99%

“… Bellar et al (2014) measured activation of the biceps femoris and the semitendinosus while the subject performed an isometric hamstring strength test at 45 and 90 degrees of knee extension with a novel hamstring assistance device. This protocol was designed to measure EMG readings at the previously stated angles at the following percentages of peak isometric force: 15, 30, 45 and 60%.…”

Section: Introductionmentioning

confidence: 99%

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Effects of an Elastic Hamstring Assistance Device During Downhill Running

Aldret

Trahan

Davis

et al. 2017

Journal of Human Kinetics

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The purpose of this study was to determine the appropriateness of using an elastic hamstring assistance device to reduce perceived levels of soreness, increase isometric strength, increase passive range of motion, and decrease biomarkers of muscle damage after eccentric exercise, specifically, downhill running This study was conducted in a university exercise physiology laboratory placing sixteen apparently healthy males ( = 21.6 ± 2.5 years) into two groups using a pre-test/post-test design. Pre-intervention measures taken included participants’ body height, body mass, body fat, capillary blood samples, VO2max, isometric hamstring strength at 45 and 90 degrees of flexion and passive hamstring range of motion. Post-intervention measures included blood biomarkers, passive range of motion, the perceived level of soreness and isometric strength. An analysis of normality of data was initially conducted followed by multivariate analysis of variance (MANOVA) of hamstring strength at 45 and 90 degrees of flexion, blood myoglobin and passive range of motion of the hamstrings. Statistically significant changes were noted in subject-perceived muscle soreness and isometric strength at 90 degrees at the 24-hour post-exercise trial measure between the two groups. Results would suggest the findings could be explained by the decrease in muscle soreness from utilizing the device during the exercise trial. Further research should be conducted to address sample size issues and to determine if the results are comparable on different surfaces.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of an Elastic Hamstring Assistance Device During Downhill Running

Aldret

Trahan

Davis

et al. 2017

Journal of Human Kinetics

View full text Add to dashboard Cite

show abstract

“…For instance, Miyawaki et al (2001) reported 28% and 35% deficits in biceps brachii (BB) and triceps brachii (TB) muscle activities, respectively, using the arm balancer assistive device. Bellar et al (2014) reported that the use of an elastic hamstring assistance device resulted in an 11.6% reduction in mean electromyographic data of the biceps femoris and a 3.5% reduction in semitendinosus muscle activities during an isometric knee extension exercise.…”

Section: Introductionmentioning

confidence: 99%