Isometric strength performance and muscle fibre type distribution in man

Abstract
Maximal isometric one-leg strength (MIS) was determined in 31 physical education students displaying a wide range in muscle fibre type distribution (21–79% fast twitch (FT) muscle fibres) in their vastus lateralis muscles. A linear positive correlation was found between MIS and the relative distribution of FT fibres (p < 0.001). This should mean that not only muscle mass involved but also the quality of muscle will be decisive for the ability to develop high isometric strength.