Piasecki, M, Ireland, A, Piasecki, J, Stashuk, D W, Swiecicka, A, Rutter, M, Jones, D A & McPhee, J S 2018, ' Failure to expand the motor unit size to compensate for declining motor unit numbers distinguishes sarcopenic from non-sarcopenic older men ', The Journal of Physiology . https://doi.org/10.1113/JP275520