Muscle fatigue during dynamic contractions assessed by new spectral indices

Article Abstract:

The applicability and sensitivity of electromyography (EMG) spectral indices is tested in assessing peripheral muscle fatigue during dynamic knee-extension exercise. This test finds that the new spectral indices provide reliable evaluation of peripheral muscle fatigue during dynamic contractions comparable with the EMG spectral characteristics traditionally used as muscle fatigue indices however, the new indices provide greater sensitivity allowing to classify the tested subjects into groups according to their muscle fatigability.

Care and treatment, Causes of, Endurance sports, Fatigue

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Sex differences in mechanomyographic responses to voluntary isometric contractions

Article Abstract:

A study was conducted to compare mechanomyography (MMG) and the force relationship during isometric ramp contractions of biceps branchii muscles in females and males to identify sex differences in MMG responses. It is concluded that sex differences in MMG responses and motor unit (MU) activation strategy result from predominant activity of the slow-twitch-MU and an effective fused tetanus in females.

Sex differences (Biology)

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Acute effects of a vibration-like stimulus during knee extension exercise

Article Abstract:

A study was conducted to test whether a low-frequency vibration-like stimulus applied during a single session of knee extension exercise would alter muscle performance. Vibration superimposition during knee extension exercise at low contraction intensity enhanced muscle performance due to adaptation of neural factors such as motor unit excitability in response to sensory receptor simulation.

Strengthening exercises

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