Motor unit plasticity is currently incorporated into many professional and collegiate training regiments. Motor unit plasticity can be measured in many ways, the most important of which being neural firing frequency, EMG amplitude, muscle force output, pre-synaptic inhibition, and synchronization. Firing frequency is defined as the number of neuronal signals sent per second on one motoneuron. This frequency is measured in Hertz. Maximum firing frequency in humans typically ranges from 100–200 Hz. Studies incorporating electromyography have proven that adaptation mechanisms occurring as a result of resistance training can drastically increase the maximal firing frequency of a motoneuron. Firing frequency has been shown to
Oh Dear! What Can the Matter Be? And nobody knew she was there. The second old lady was Abigail Splatter. She went there 'cause something was definitely the matter. But when she got there, it was only her bladder, And nobody knew she was there. </poem> One suggested precursor to the bawdy song, recorded in William's "Upper Thames" collection is the following "old morris fragment": <poem> Oh, dear, what can the matter be? Three old women tied to an apple tree! One ran away, the others stopped till Saturday. Oh, dear, what can the matter be? </poem> As with many folk songs and tall tales each verse