The force of muscle contraction can be increased by all of the following except
The amplitude of action potential cannot be increased as it follows ‘All or none’ law. Force of contraction can be increased by increasing the number of motor units involved in contraction, by increasing the frequency of activation of motor units or by recruiting larger motor units.
Increasing the frequency of activation of motor units
Increasing the number of motor units activated
Increasing the amplitude of action potentials in the motor neurons
Recruiting larger motor units