Because of the correlation between the size of a motor unit and the type of fiber it contains, recruitment of fibers happen in a specific order. Which of the following fibers are recruited first?

Slow oxidative fibers

Fast oxidative fibers

Medium oxidative fibers

Slow oxidative fibers

Explanation:

Henneman Edward is a scientist who stated fibre size principle which gave the guidelines for the recruitment of muscle fibres he tried to show that fibres with small sizes are first recruited before fibres of larger sizes, he also showed that slow moving oxidative fibres are recruited first before fast moving oxidative fibres.

Oxidative fibres are fibres that utilizes aerobic respiration in order to primarily produce energy in the Form of ATP (adenosine triphosphate) the energy currency of cells.