–The maximum voluntary force/torque values (normalized by the mean values of 11-year-old group and expressed as a %) as a function of age in TD children in: (a) index finger pressing force task, (b) thumb-index finger pinching force task, and (c) thumb-index finger pinching torque task. Coefficient of variations (CV), as a function of age in TD children in: (d) constant index finger pressing force task, (e) thumb-index finger pinching force task, and (f) thumb-index finger pinching torque task are also shown. ** p<.01.