Reliability of resting intramuscular fiber conduction velocity evaluation

Autor: Nikolaos Karandreas, Gerasimos Terzis, Spyridon Methenitis
Rok vydání: 2017
Předmět:
Zdroj: Scandinavian Journal of Medicine & Science in Sports. 28:48-56
ISSN: 1600-0838
0905-7188
DOI: 10.1111/sms.12908
Popis: Characterization of the least number of muscle fibers analyzed for a quick and reliable, evaluation of intramuscular fiber conduction velocity (MFCV) is of importance for sport scientists. Aim of the present study was to evaluate the reliability of vastus lateralis’ intramuscular MFCV measuring either 25 or 50 different muscle fibers per participant, as well as to compare intramuscular MFCV measured in 25 (C25), 50 (C50) or 140 (C140) muscle fibers. Resting vastus lateralis’ MFCV was measured in twenty-one young healthy males (age 22.1 ± 2.4 yrs) using intramuscular microelectrodes in different days. Test-retest reliability of MFCV's parameters were calculated for C25 and C50 while MFCV was compared among C25, C50 and C140. Significant differences of MFCV parameters were observed between C25 condition and those of C50 and C140. The differences in MFCV values between conditions C50 and C140 were non-significant. A close correlation was found for MFCV between C50 and C140 (r = 0.884 - 0.988, p = 0.000). All reliability measures of MFCV measured with 50 fibers were high (e.g. ICC = 0.813 - 0.980, p = 0.000), in contrast to C25 (e.g. ICC = 0.023 - 0.580 p > 0.05). In conclusion, an average of 50 different fibers per subject is sufficient to provide a quick and reliable intramuscular evaluation of vastus lateralis MFCV. This article is protected by copyright. All rights reserved.
Databáze: OpenAIRE
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