Actions of β2-adrenoceptor agonist drug on neuromuscular function after fatigue.

Purpose: The effects of β2-agonists on human skeletal muscle contractile function are unclear, more particularly in the presence of fatigue. Moreover, it remains to be ascertained whether central motor drive during voluntary contractions could counter for eventual contractile alterations induced by β2-agonists. This study explored central and peripheral neuromuscular adjustments of the quadriceps induced by β2-agonist terbutaline after fatiguing exercise.

Actions of β2-adrenoceptor agonist drug on human soleus muscle contraction.

Purpose: The effects of β(2)-agonists on human skeletal muscle contractile properties, particularly on slow fibers, are unclear. Moreover, it remains to be ascertained whether central motor drive (CMD) during voluntary contractions could counter for eventual contractile alterations induced by β(2)-agonists. This study investigated central and peripheral neuromuscular adjustments induced by β(2)-agonist terbutaline on a predominantly slow human muscle, the soleus.

Effects of salbutamol on the contractile properties of human skeletal muscle before and after fatigue.

Aim: The study examined the effects of an oral acute administration of the β2-agonist salbutamol (Sal) (6 mg) vs. placebo on muscle strength and fatigability in 12 non-asthmatic recreational male athletes in a randomized double-blind protocol.

Methods: Contractile properties of the right quadriceps muscle were measured during electrical stimulations, i.

Reverse genetic analysis of Ourmiaviruses reveals the nucleolar localization of the coat protein in Nicotiana benthamiana and unusual requirements for virion formation.

Ourmia melon virus (OuMV) is the type member of the genus Ourmiavirus. These viruses have a trisegmented genome, each part of which encodes a single protein. Ourmiaviruses share a distant similarity with other plant viruses only in their movement proteins (MP), whereas their RNA-dependent RNA polymerase (RdRP) shares features only with fungal viruses of the family Narnaviridae.

A new method to measure rolling resistance in treadmill cycling.

The purpose of this study was to evaluate a new method of measuring rolling resistance in treadmill cycling and to establish its sensitivity and reproducibility. One participant was asked to keep a bicycle in equilibrium on a treadmill without pedalling at a constant speed of 5.56 m x s(-1), which was held in place in the front by a dynamometer.