Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Muscle fibre conduction velocity during a 30-s Wingate anaerobic test

Stewart, D. and Farina, D. and Shen, C. and Macaluso, A. (2011) Muscle fibre conduction velocity during a 30-s Wingate anaerobic test. Journal of Electro - myography and Kinesiology, 21 (3). pp. 418-422. ISSN 1050-6411

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

Ten male volunteers (age 29.2 +/- 5.2 years, mean +/- SD) were recruited to test the hypothesis that muscle fibre conduction velocity (MFCV) would decrease with power output during a 30-s Wingate test on a mechanically-braked cycle ergometer. Prior to the main test, the optimal pre-fixed load corresponding to the highest power output was selected following a random series of six 10-s sprints. Surface electromyographic (EMG) signals were detected from the right vastus lateralis with linear adhesive arrays of eight electrodes. Power output decreased significantly from 6-s until the end of the test (860.9 +/- 207.8 vs. 360.9 +/- 11.4 W, respectively) and was correlated with MFCV (R = 0.543, P < 0.01), which also declined significantly by 26.8 +/- 11% (P < 0.05). There was a tendency for the mean frequency of the EMG power spectrum (MNF) to decrease, but average rectified values (ARV) remained unchanged throughout the test. The parallel decline of MFCV with power output suggests changes in fibre membrane properties. The unaltered ARV, together with the declined MFCV, would indicate either a decrease in discharge rate, de-recruitment of fatigued motor units or elongation of still present motor unit action potentials.