RT Journal Article
T1 Mechanomyographic measures of muscle contractile properties are influenced by electrode size and stimulation pulse duration
A1 Piqueras Sanchiz, Francisco
A1 Martín Rodríguez, Saúl
A1 Pareja Blanco, Fernando
A1 Baraja Vegas, Luis
A1 Blázquez Fernández, Jorge
A1 Bautista, Iker J.
A1 García García, Óscar
K1 2411.10 Fisiología del Músculo
K1 2411 Fisiología Humana
AB The aim was to determine the effects of changing pulse duration and electrode size on muscle contractile properties. Thirty-six healthy young male participated in the study (age 24.8 ± 5.8 years; height 178.2 ± 0.6 cm; body mass 71.8 ± 7.3 kg; self-reported weekly moderate intensity activity 3.5 ± 1.2 h·week−1). Tensiomyography was used to assess rectus femoris (RF) and vastus medialis (VM) muscles neuromuscular properties of the dominant leg according to the electrode size (3.2–5 cm) and the stimulus length (0.2, 0.5, and 1 ms). Maximal radial displacement (Dm); Contraction time (Tc); Delay time (Td); Sustained time (Ts) and Half relaxation time (Tr) were measured. Relative and absolute reliability was quantified. To analyze the effects of the electrode and the stimulus length, a repeated-measures analysis of variance was used. Dm and Tc parameters showed for both muscles an excellent relative (0.95–0.99) and absolute reliability (1.6–4.2%). However, Ts and Tr showed low values of absolute reliability (4.4–40.9%). The duration of the stimulus length applied to the RF and VM and electrode size significantly influences muscle’s contractile properties (p < 0.05; η2p = 0.09–0.60). The Dm increases substantially as the duration of the stimulus increases and with the use of the larger electrode in both muscles. However, Tc and Td are less affected by both conditions and not entirely clear. Practically, our study suggests that a stimulus pulse duration of 1 ms together with a 5 × 5 cm electrode is necessary to reach a reliable and reproducible assessment of both RF and VM muscles contractile propertie
PB Scientific Reports
SN 20452322
YR 2020
FD 2020-05-18
LK http://hdl.handle.net/11093/3914
UL http://hdl.handle.net/11093/3914
LA eng
NO Scientific Reports, 10(1): 8192 (2020)
DS Investigo
RD 30-sep-2023