Related Clues:

• Flurry of activity
• Charley horse
• Muscle woe
• Seizure
• Involuntary contraction
• Charley horse, e.g.
• Back ailment
• Convulsion
• Swimmer's pain
• Muscular jerk?
• More than a twitch
• Swimmer's problem
• Cramp
• Some kind of jerk?
• Common contraction?