Endurance exercise training in common carp Cyprinus carpio L. induces proliferation of myonuclei in fast muscle fibres and slow muscle fibre hypertrophy.

Endurance exercise training (2.4-2.6 body lengths s(-1), 16 h day(-1) for 28 days) resulted in an increased density of myonuclei in fast muscle fibres relative to tank rested controls and induced slow muscle fibre hypertrophy. The results indicate that exercise is a powerful stimulus for the proliferation of myogenic cells and nuclear accretion. (c) 2006 The Authors Journal compilation (c) 2006 The Fisheries Society of the British Isles.