Muscle Hypertrophy

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William C Olivero - One of the best experts on this subject based on the ideXlab platform.

Mohammed Al-mukhaini - One of the best experts on this subject based on the ideXlab platform.

Ganganath Rodrigo - One of the best experts on this subject based on the ideXlab platform.

  • isolated unilateral temporalis Muscle Hypertrophy in a child a case report with literature review
    BMC Pediatrics, 2018
    Co-Authors: Jagath Ranasinghe, Chandani Wickramasinghe, Ganganath Rodrigo
    Abstract:

    Temporalis Muscle Hypertrophy is a rare entity of masticatory Muscle Hypertrophy. All types of masticatory Muscle hypertrophies have been documented of which temporalis Muscle Hypertrophy is one. Temporalis Muscle Hypertrophy is most commonly bilateral and usually associated with other types of masticatory Muscles Hypertrophy such as masseter or pterygoid Hypertrophy. However, isolated unilateral temporalis Muscle Hypertrophy is extremely rare and only 9 cases have been reported to date in English literature since 1990 with only two patients less than 18 years. There is no exact etiology identified and the diagnosis is made by Muscle biopsy combined with imaging study to exclude other possibilities. Age at presentation is ranges from 15 to 65 years with involvement of both sexes. We report the youngest child who is a seven year old girl with right side isolated unilateral temporalis Muscle Hypertrophy. In this patient, we discuss the youngest child with isolated unilateral temporalis Muscle Hypertrophy and literature review to date. The patient is a seven year old female presenting with painless swelling of the right temporalis Muscle. There had no features of inflammation, trauma, neoplasm or history of parafunctions such as bruxism. The child was not complaining significantly headache or visual disturbances as well. She had undergone radiological assessment with ultrasound scan and contrast MRI. The diagnosis was confirmed by Muscle biopsy which shows normal Muscle architecture. She was managed conservatively with regular follow up. Isolated unilateral temporalis Muscle Hypertrophy is extremely rare in children. However this case raises the importance of considering alternative diagnoses despite the condition being rare in the pediatric population.

Jeremy P. Loenneke - One of the best experts on this subject based on the ideXlab platform.

  • What is the Impact of Muscle Hypertrophy on Strength and Sport Performance
    Strength & Conditioning Journal, 2018
    Co-Authors: William G. Hornsby, Takashi Abe, Jeremy A. Gentles, G. Gregory Haff, Michael H. Stone, Samuel L. Buckner, Scott J. Dankel, Zachary W. Bell, Jeremy P. Loenneke
    Abstract:

    ABSTRACTFOR DECADES, MOST SCIENTISTS AND PRACTITIONERS HAVE AGREED THAT Muscle Hypertrophy ALSO INDUCES STRENGTH GAINS. HOWEVER, A RECENT PUBLICATION “THE PROBLEM OF Muscle Hypertrophy: REVISITED,” BUCKNER, SL, DANKEL, SJ, MATTOCKS, KT, JESSEE, MB, MOUSER, JG, COUNTS, BR, ET AL. THE PROBLEM OF MUSCL

  • Do metabolites that are produced during resistance exercise enhance Muscle Hypertrophy?
    European Journal of Applied Physiology, 2017
    Co-Authors: Scott J. Dankel, Samuel L. Buckner, Kevin T. Mattocks, Matthew B. Jessee, J. Grant Mouser, Jeremy P. Loenneke
    Abstract:

    Many reviews conclude that metabolites play an important role with respect to Muscle Hypertrophy during resistance exercise, but their actual physiologic contribution remains unknown. Some have suggested that metabolites may work independently of Muscle contraction, while others have suggested that metabolites may play a secondary role in their ability to augment Muscle activation via inducing fatigue. Interestingly, the studies used as support for an anabolic role of metabolites use protocols that are not actually designed to test the importance of metabolites independent of Muscle contraction. While there is some evidence in vitro that metabolites may induce Muscle Hypertrophy, the only study attempting to answer this question in humans found no added benefit of pooling metabolites within the Muscle post-exercise. As load-induced Muscle Hypertrophy is thought to work via mechanotransduction (as opposed to being metabolically driven), it seems likely that metabolites simply augment Muscle activation and cause the mechanotransduction cascade in a larger proportion of Muscle fibers, thereby producing greater Muscle growth. A sufficient time under tension also appears necessary, as measurable Muscle growth is not observed after repeated maximal testing. Based on current evidence, it is our opinion that metabolites produced during resistance exercise do not have anabolic properties per se, but may be anabolic in their ability to augment Muscle activation. Future studies are needed to compare protocols which produce similar levels of Muscle activation, but differ in the magnitude of metabolites produced, or duration in which the exercised Muscles are exposed to metabolites.

  • Possibility of leg Muscle Hypertrophy by ambulation in older adults: A brief review
    Clinical Interventions in Aging, 2013
    Co-Authors: Hayao Ozaki, Joel M. Stager, Jeremy P. Loenneke, Robert S. Thiebaud, Takashi Abe
    Abstract:

    It is known that ambulatory exercises such as brisk walking and jogging are potent stimuli for improving aerobic capacity, but it is less understood whether ambulatory exercise can increase leg Muscle size and function. The purpose of this brief review is to discuss whether or not ambulatory exercise elicits leg Muscle Hypertrophy in older adults. Daily ambulatory activity with moderate (>3 metabolic equivalents [METs], which is defined as the ratio of the work metabolic rate to the resting metabolic rate) intensity estimated by accelerometer is positively correlated with lower body Muscle size and function in older adults. Although there is conflicting data on the effects of short-term training, it is possible that relatively long periods of walking, jogging, or intermittent running for over half a year can increase leg Muscle size among older adults. In addition, slow-walk training with a combination of leg Muscle blood flow restriction elicits Muscle Hypertrophy only in the blood flow restricted leg Muscles. Competitive marathon running and regular high intensity distance running in young and middle-aged adults may not produce leg Muscle Hypertrophy due to insufficient recovery from the damaging running bout, although there have been no studies that have investigated the effects of running on leg Muscle morphology in older subjects. It is clear that skeletal Muscle Hypertrophy can occur independently of exercise mode and load.

  • Skeletal Muscle Hypertrophy: How important is Exercise Intensity?
    Journal of Trainology, 2012
    Co-Authors: Jeremy P. Loenneke
    Abstract:

    throughout a lifetime is essential for a favorable quality of life. Like most human tissue, skeletal Muscle is highly plastic and is capable of responding to a stimulus through a network of anabolic signaling which results in growth and increases in strength. Skeletal Muscle functions as the largest disposal site of ingested glucose 1, plays an important role in lipid oxidation 2, 3, and is one of the greatest modifiable contributors to the resting metabolic rate 4, demonstrating the importance of maintaining skeletal Muscle quantity and quality. In contrast, the removal of that appropriate stimulus results in the loss of favorable Muscle adaptations. Current recommendations for resistance training exercise intensities are commonly based on a percentage of the concentric one repetition maximum (1RM) for a particular exercise. By definition there is a direct relationship between the external load lifted and the exercise intensity (↑external load=↑exercise intensity and vice versa). The American College of Sports Medicine (ACSM) recommends that novice lifters lift at 70-85% 1RM and advanced lifters work with intensities ranging from 70-100% 1RM 5 in order to produce measurable changes in skeletal Muscle Hypertrophy. Recommendations from the National Strength and Conditioning Association (NSCA) in their current issue of the Essentials of Strength Training and Conditioning textbook mirror those of the ACSM 6. It is acknowledged that exercise intensity is only one of many variables (e.g. contraction velocity, contraction time, rest periods, volume, etc.) that can affect the chronic adaptation from resistance training. However, we emphasize exercise intensity in this review, because both the ACSM 5 and NSCA 6 emphasize this as an important variable for increasing skeletal Muscle mass. Therefore, the purpose of this manuscript will be to discuss the skeletal Muscle Hypertrophy exercise intensity recommendations and discuss what these recommendations are largely based on. This manuscript will review recent acute and chronic data which suggests that exercise intensity may be playing less of a role with skeletal Muscle Hypertrophy than previously thought.

Prashanth Panduranga - One of the best experts on this subject based on the ideXlab platform.

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