The Effects of Acupuncture Needle Stimulation on Skeletal Muscle Activity and Performance

Skeletal muscle glucose uptake closely reflects muscle activity at exercise intensity levels <55% of maximal oxygen consumption (V̇o2max). Our purpose was to evaluate individual skeletal muscle activity from glucose uptake in humans during pedaling exercise at different workloads by using [18F]fluorodeoxyglucose (FDG) and positron emission tomography (PET). Twenty healthy male subjects were divided into two groups (7 exercise subjects and 13 control subjects). Exercise subjects were studied during 35 min of pedaling exercise at 40 and 55% V̇o2max exercise intensities. FDG was injected 10 min after the start of exercise or after 20 min of rest. PET scanning of the whole body was conducted after completion of the exercise or rest period. In exercise subjects, mean FDG uptake [standardized uptake ratio (SUR)] of the iliacus muscle and muscles of the anterior part of the thigh was significantly greater than uptake in muscles of control subjects. At 55% V̇o2max exercise, SURs of the iliacus muscle and thigh muscles, except for the rectus femoris, increased significantly compared with SURs at 40% V̇o2max exercise. Our results are the first to clarify that the iliacus muscle, as well as the muscles of the anterior thigh, is the prime muscle used during pedaling exercise. In addition, the iliacus muscle and all muscles in the thigh, except for the rectus femoris, contribute when the workload of the pedaling exercise increases from 40 to 55% V̇o2max.

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Regulation of the Size and Distribution of Agrin-Induced Postsynaptic-like Apparatus in Adult Skeletal Muscle by Electrical Muscle Activity

Molecular and Cellular Neuroscience ◽

10.1006/mcne.1999.0744 ◽

1999 ◽

Vol 13 (3) ◽

pp. 207-217 ◽

Cited By ~ 15

Author(s):

Iacob Mathiesen ◽

Mendell Rimer ◽

Omid Ashtari ◽

Ilana Cohen ◽

Uel J. McMahan ◽

...

Keyword(s):

Skeletal Muscle ◽

Muscle Activity ◽

Adult Skeletal Muscle ◽

Electrical Muscle

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Interrelationships between skeletal muscle adaptations and performance as studied by detraining and retraining

Acta Physiologica Scandinavica ◽

10.1111/j.1748-1716.1979.tb06328.x ◽

1979 ◽

Vol 105 (2) ◽

pp. 163-170 ◽

Cited By ~ 66

Author(s):

Michael E. Houston ◽

Henning Bentzen ◽

Henrik Larsen

Keyword(s):

Skeletal Muscle ◽

Muscle Adaptations ◽

And Performance ◽

Skeletal Muscle Adaptations

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Evaluation of Skeletal Muscle Activity During Foot Training Exercises Using Positron Emission Tomography

10.21203/rs.3.rs-958459/v1 ◽

2021 ◽

Author(s):

Tomoyuki Kanayama ◽

Junsuke Nakase ◽

Takafumi Mochizuki ◽

Kazuki Asai ◽

Rikuto Yoshimizu ◽

...

Keyword(s):

Skeletal Muscle ◽

Positron Emission Tomography ◽

Muscle Activity ◽

Skeletal Muscles ◽

Standardized Uptake Value ◽

Emission Tomography ◽

Abductor Hallucis ◽

Continuous Training ◽

Positron Emission ◽

The Difference

Abstract The foot exercises “rock-paper-scissors” and “towel gathering” are widely used in patients with lower limb disorders; however, there are no detailed reports on muscle activity during such training. We quantitatively evaluated the difference in skeletal muscle activity between the two exercises using positron emission tomography. Eight university student athletes were included. Four participants each were assigned to the foot rock-paper-scissors and towel gathering groups. Participants in each group underwent continuous training for 15 min. They received an intravenous injection of 18F-fluorodeoxyglucose and retrained for 15 min, following which they rested for 45 min. Regions of interest were defined in 25 muscles. The standardized uptake value (SUV) in the trained limb was compared with that in the non-trained control limb. SUVs increased in four skeletal muscles (tibialis anterior, peroneus brevis, extensor hallucis brevis, and abductor hallucis) in the rock-paper-scissors group, and in four muscles (flexor digitorum longus, extensor hallucis brevis, extensor digitorum brevis, and quadratus plantae) in the towel gathering group. Thus, foot rock-paper-scissors and towel gathering affected skeletal muscles related to the medial longitudinal arch and toe grip strength, respectively. Given that the two exercises target different skeletal muscles, they should be taught and implemented according to their respective purposes.

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Influence of Training-induced Testosterone and Cortisol Changes on Skeletal Muscle and Performance in Elite Junior Athletes

American Journal of Sports Science and Medicine ◽

10.12691/ajssm-9-1-4 ◽

2021 ◽

Vol 9 (1) ◽

pp. 13-23

Author(s):

Janel Bailey ◽

Rachel Irving ◽

Paula Dawson ◽

Dialo-Rudolph Brown ◽

Eon Campbell

Keyword(s):

Skeletal Muscle ◽

Junior Athletes ◽

And Performance

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The Effects of Bench Press Variations in Competitive Athletes on Muscle Activity and Performance

Journal of Human Kinetics ◽

10.1515/hukin-2017-0047 ◽

2017 ◽

Vol 57 (1) ◽

pp. 61-71 ◽

Cited By ~ 18

Author(s):

Atle Hole Saeterbakken ◽

Dag-André Mo ◽

Suzanne Scott ◽

Vidar Andersen

Keyword(s):

Muscle Activity ◽

Latissimus Dorsi ◽

Bench Press ◽

Biceps Brachii ◽

High Load ◽

Emg Activity ◽

International Level ◽

Triceps Brachii ◽

Competitive Athletes ◽

And Performance

AbstractThe aim of the study was to compare the EMG activity performing 6RM competition style bench press (flat bench-wide grip) with 1) medium and narrow grip widths on a flat bench and 1) inclined and declined bench positions with a wide grip. Twelve bench press athletes competing at national and international level participated in the study. EMG activity was measured in the pectoralis major, anterior and posterior deltoid, biceps brachii, triceps brachii and latissimus dorsi. Non-significant differences in activation were observed between the three bench positions with the exception of 58.5-62.6% lower triceps brachii activation, but 48.3-68.7% greater biceps brachii activation in the inclined bench compared with the flat and declined bench position. Comparing the three grip widths, non-significant differences in activations were observed, with the exception of 25.9-30.5% lower EMG activity in the biceps brachii using a narrow grip, compared to the medium and wide grip conditions. The 6-RM loads were 5.8-11.1% greater using a medium and wide grip compared to narrow grip width and 18.5-21.5% lower in the inclined bench position compared with flat and declined. Comparing the EMG activity during the competition bench press style with either the inclined and declined bench position (wide grip) or using a narrow and medium grip (flat bench), only resulted in different EMG activity in the biceps- and triceps brachii. The 6RM loads varied with each bench press variation and we recommend the use of a wide grip on a flat bench during high load hypertrophy training to bench press athletes.

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