Physical training can lead to changes in muscle composition andproperties of local motor neurons, both of which will alter ourcapabilities to carry out movements. Are the following statementsabout that type of plasticity of our motor system TRUE orFALSE?

While riding a bike, maintaining posture to keep sitting on thesaddle is carried out by slow motor units, while the legs use fastfatigable motor units, while working really hard to get up a shortsteep incline very fast. Imagine you previously trained for lifting heavy weights and nowtrain for running marathons, This leads to an increase in theexcitability of the motor neurons, so that neurons start to becomeactive with weaker stimulation. Due to the decreased excitability of motor neurons aftertraining for heavy lifting, the muscle fibers they activate becomeactive already when the task is to lift very lightobjects.   Unless your little pinky finger is trained to do heavy lifting,we can safely assume that the motor neurons that activate itsmuscles contact only very few muscle fibers. A motor neuron that has a relatively short duration ofhyperpolarization (overshoot) after an action potential is expectedto be able to produce higher action potential firing frequenciesand thus stronger contractions of muscle fibers. A fast, large, strong, fast fatigable (FF) motor unit motorneuron that was trained to do heavy lifting has a very small axondiameter.