There are five different subcategories of action tremor: Action tremorsĪction tremors occur during voluntary muscle movements. Resting tremors decrease during voluntary movements. For example, a person may experience a resting tremor in their hands when the hands are resting on their lap. Resting tremors occur in a body part that is relaxed and completely supported by gravity. These categories are resting tremors and action tremors. Medical experts classify body tremors into two categories. Share on Pinterest Resting and action tremors are involuntary muscle contractions, which may signify an underlying medical condition.
