Different types of muscular contractions in rugby?

Answer 1

In Rugby when you are pushing against each other( in a rugby scrum) your muscles contract but stay the same length and this is isometric contraction. Even though you are using a lot of force your muscles stay the same length.

Answer 2

A muscles contraction (also known as a muscle twitch or simply twitch) occurs when a http://www.answers.com/topic/skeletal-muscle generates tension through the action of http://www.answers.com/topic/actin and http://www.answers.com/topic/myosin cross-bridge cycling. While under tension, the muscle may http://www.answers.com/topic/muscle-contraction#Eccentric_contraction#Eccentric_contraction, http://www.answers.com/topic/muscle-contraction#Concentric_contraction#Concentric_contraction or http://www.answers.com/topic/muscle-contraction#Isometric_contraction#Isometric_contraction.