Assessment of eccentric exercise-induced muscle damage of the elbow flexors by tensiomyography

Muscle mechanical properties of strength and endurance athletes and changes after one week of intensive training

“…As less motor units are recruited during lengthening muscle actions in comparison to isometric and concentric actions, while producing a great amount of force, damage in cellular structures are yielded (Hunter et al, 2012;Howatson and van Someren, 2008;Howatson and Milak, 2009;Schoenfeld, 2012). In this regard, Hunter et al (2012) recently demonstrated that the parameter Dm is closely associated with exercise-induced muscle damage.…”

“…It may provide an additional advantage in the applied field to detect between-group differences in cross-sectional comparisons (e.g., talent detection) and within-group changes in longitudinal assessments (e.g., after training and rest periods), as it allows a non-invasive evaluation of the contractile properties (Carrasco et al, 2011;de Paula Simola et al, 2015;Hunter et al, 2012) without producing additional fatigue, and examines muscle in isolation (García-García et al, 2015;Loturco et al, 2015). The TMG mechanical properties have been used to investigate the effects of different types of physical exercise, such as strength (de Paula Simola et al, 2015;García-Manso et al, 2012;Hunter et al, 2012) and endurance (García-Manso et al, 2011), besides estimating the fiber typer composition in skeletal muscle (Simunic et al, 2011). Nonetheless, information concerning differences in TMG mechanical properties of typical endurance and strength/power athletes is spare (Loturco et al, 2015).…”

Comportamiento neuromuscular posterior a la competencia en jugadores profesionales de fútbol de Costa Rica: un seguimiento tensiomiográfico

“…La intensidad de los impulsos eléctricos según la capacidad del equipo es de entre 1 mA-110 mA, con una duración de fase de 1 ms y una forma de onda monofásica cuadrangular (Rey, Lago-Peñas & Lagos-Ballesteros, 2012). Las descargas eléctricas se realizan con un estimulador artificial Ljubljana,Slovenia) e inician en 20 mA hasta el máximo desplazamiento mecánico del vientre muscular, similar a lo indicado por Hunter, et al, (2012). Para provocar el máximo desplazamiento mecánico se realizaron incrementos graduales de 10 mA cada descarga (Ditroilo, Smith, Fairweather & Hunter, 2013).…”

Determining minimal stimulus intensity for mechanomyographic analysis

“…More recently, MMG has been investigated to determine whether it can be reliably utilized in monitoring the recovery of injured muscles (McAndrew et al, 2005). In a study by Hunter et al (2012), the authors employed an eccentric fatiguing protocol on the forearm flexor muscles, in a group of volunteers, in order to induce a delayed onset of muscle soreness (DOMS). Inducing muscle contractions through the delivery of percutaneous neuromuscular stimulations (PNS) to monitor contraction dynamics daily, the authors showed changes in contraction dynamics between non-injured and injured muscle states and between the onset of injury to complete recovery.…”