Voluntary evoked neuromuscular properties of the dorsiflexors.

Old men had lower maximal voluntary isometric contraction (MVC) strength and concentric strength. Voluntary activation and antagonist coactivation (MVC Co-act) was not significantly different between groups. Eccentric strength was well maintained in old men relative to young and other contraction modes (ratio of eccentric to isometric strength; Ecc:Iso, ratio of eccentric to concentric strength; Ecc:Con). Passive force enhancement (PFE) was greater in old than young. Values are means ± standard deviation. * Denotes significant age difference.