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The muscle twitch lasts for about 0.1 seconds. It has three stages:

  1. Latent period: It is the period of no contraction and lasts for about 0.01 seconds.
  2. Phase of shortening or contraction: It is the phase when work is done. It lasts for about 0.04 seconds.
  3. 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.