The muscle twitch lasts for about 0.1 seconds. It has three stages:
Latent period: It is the period of no contraction and lasts for about 0.01 seconds.
Phase of shortening or contraction: It is the phase when work is done. It lasts for about 0.04 seconds.
Phase of relaxation: It is the phase when muscle returns to its previous relaxed state, and recovery is complete. It lasts for about 0.05 seconds.