Motor unit recordings from a study participant. In standing balance there was Intermittent motor unit activity in the medial gastrocnemius muscle (red) and continuous activity in the soleus muscle (blue). Interestingly, there was no motor unit activity in the lateral gastrocnemius muscle (middle three recordings). When the participant was supported and performed a ramp and hold contraction, motor units in the lateral gastrocnemius muscle were recruited much later than those from the other parts of the triceps surae.