Muscle adaptation to type of training load: An EMG study in elite athletes
Journal Title: Indian Journal of Neurosciences - Year 2017, Vol 3, Issue 4
Abstract
Introduction: Muscle fiber composition and fatigue characteristics are different in strength or endurance trained elite athletes, this may be a result of muscle adaptation to specific training loads. EMG power spectra can be used to study these differences. Objective: Study the effect of long-term training on the muscle fatigue and fiber composition. Methods: SEMG was recorded in country’s elite athletes who were either endurance (Marathoners/ Long distance runners, En; n=20) or strength (Weight lifters / Throwers, St; n=20) trained for past > 5 years. The fall in EMG median frequency (MDF) of two upper body (Biceps Brachii; BB & Triceps; TR) and two lower body (Vastus Lateralis; VL & Biceps Femoris; BF) muscles, during 80% MVC isometric contraction was used to assess fatigability and thus the predominant muscle fiber type. Similar data was also collected in untrained controls (Un; n=20). Results: MDF showed no significant fall (p > 0.05) during the task in TR and VL in all the groups, indicating higher proportion of type I fibers and inconsequent influence of type of training. BB & BF (St & Un only) MDF fell significantly (p< 0.05) during the task indicative of more type II fibers. BF MDF in En group though showed a decrease but it was not statistically significant (p > 0.05). Conclusion: The results indicate higher proportion type I fibers in hamstrings (BF) of Endurance trained athletes when compared to other subjects, suggestive of its adaptability to long-term endurance training.
Authors and Affiliations
Atul Shekhar, DBS Brashier, Vishal Sharma, BK Nayak, Latika Mohan
Keywords
Related Articles
- EP ID EP310684
- DOI 10.18231/2455-8451.2017.0031
- Views 79
- Downloads 0
Candidal meningitis in disseminated candidiasis by Candida tropicalis - A rare case report from India
IntroductionCandida spp are the normal flora of human body and do not cause CNS disease unless there is some immune disturbance The prevalence of non albicans species differed significantly in various geographic areas Ca...
Intramedullary epidermoid cyst of spinal cord: Experience of 24 Cases at a Tertiary Care Institute
Introduction: Epidermoid cyst is the sequel of developmental aberration often intriguing the neurosurgeons. Intramedullary epidermoid cysts are rare entities with delay and variability in the clinical presentation. The a...
Sensation seeking and high risk behaviour among alcohol dependent patients
Objective To study the relationship between sensation seeking and high risk behaviour in alcohol dependent patientsIntroduction Several studies have indicated the role of sensation seeking as a personality construct in e...
Choroidal melanoma with isolated brain metastasis- A rare occurance
Choroidal melanoma is the second most common primary malignant melanoma of the body The most common site for metastasis of choroidal melanoma is liver Isolated brain metastases in choroidal melanomas is extremely rare En...
In Silico docking analysis of Amyloid Precursor Protein Intracellular Domain (AICD) with neuronal cytoplasmic and nuclear membrane proteins and its relevance in neuronal death and AD pathogenesis
Recent evidences reveal the controlled intramembrane proteolysis of the C-terminal fragment of amyloid precursor-protein (APP) by gamma-secretases, yielding an additional 57 residue peptide fragment called APP intracellu...