Therapeutic modalities such as heat and cold therapies are used to manage injury and promote healing. Cold modalities like ice reduce inflammation and pain through vasoconstriction. Heat increases blood flow and circulation to aid healing. Modalities must be appropriately timed and balanced to support healing without hindering it. Examples of cold modalities include ice packs and contrast baths, while heat modalities include whirlpools, paraffin baths, and ultrasound. Electrical stimulation like TENS and interferential current can also reduce pain and swelling and promote muscle recovery.