Search results for "Active muscle"
showing 3 items of 3 documents
The effects of muscle history on short latency stretch reflex response of soleus muscle
2003
Abstract The purpose of the present study was to investigate the combined effects of muscle history, activation and stretching velocity on short latency stretch response (SLR). Stretches (70, 120 and 200 deg s-1) were elicited to both passive and active (10–25% MVC) triceps surae muscle with constant (ISO), lengthened (LEN) or shortened (SHO) muscle length. Under the passive SHO pre-condition both SLR amplitude and reflex torque (RT) decreased where as latency increased compared with the passive ISO pre-condition. Such observations were absent in active trials. Stretches applied to a lengthening passive muscle (LEN) resulted in smaller SLR amplitude and RT compared with passive ISO. In acti…
Aktive Muskeldehntestung der ischiocruralen Muskulatur: Referenzwerte und Einflussfaktoren
2013
Einleitung: Eine verminderte Dehnfahigkeit der ischiocruralen Muskulatur fuhrt zu einem erhohten Verletzungsrisiko. Ziel ist deshalb die Herstellung einer muskularen Balance. Der Active-Knee-Extension-Test (AKE) uberpruft die Dehnfahigkeit der ischiocruralen Muskulatur. Da die bislang verfugbaren „Referenzwerte“ einem Kollektiv von wenigen mannlichen Probanden entstammen, ist deren Aussagekraft nur eingeschrankt verwertbar. Ziel der vorliegenden Studie ist daher die Erhebung von Referenzwerten an einem grosen gemischtgeschlechtlichen Probandenkollektiv gesunder Fitnesssportler sowie die Ermittlung von Einflussfaktoren auf die aktive Dehnfahigkeit der ischiocruralen Muskulatur. Material und …
2019
Post-activation potentiation (PAP) is a well-described phenomenon with a short half-life (~28 s) that enhances muscle force production at submaximal levels of calcium saturation (i.e., submaximal levels of muscle activation). It has been largely explained by an increased myosin light chain phosphorylation occurring in type II muscle fibers, and its effects have been quantified in humans by measuring muscle twitch force responses to a bout of muscular activity. However, enhancements in (sometimes maximal) voluntary force production detected several minutes after high-intensity muscle contractions are also observed, which are also most prominent in muscles with a high proportion of type II fi…