Effectiveness of an injury prevention video on risky behaviours in youth snow sports: A randomized controlled trial.

Objectives: Ski and snowboard-related injuries are common among Canadian youth. Analyzing the role of risky behaviours that contribute to injury risk is essential for gaining an understanding of injury prevention opportunities. The objective was to determine if rates of risky behaviour seen at the ski hill were lower for children and adolescents exposed to an educational injury prevention video.

Increased force following muscle stretching and simultaneous fibre shortening: Residual force enhancement or force depression - That is the question?

Residual force enhancement (rFE) describes the increase in isometric force following muscle stretching compared to the corresponding isometric force. Even though rFE is consistently observed in isolated muscle preparations, it is not always observed in human skeletal muscle. This inconsistency might be associated with disociations between length changes in muscle tendon units (MTUs) and fibres.