Stop Icing Your Injuries — Here's What the Research Says Instead
ICE— OR —HEAT
You rolled your ankle — reach for the ice, right? Maybe not. The old rulebook on ice and heat has quietly been rewritten, and grabbing the wrong one at the wrong moment can stall the healing you're trying to speed up. Here's what the current research actually says.
It's one of the most common questions we get at Root Physical Therapy: "Should I ice it or heat it?" For decades the answer seemed simple — ice for injuries, heat for stiffness. But the research has shifted, and some of what you grew up believing is now considered outdated, or even counterproductive.
For 40 years, the reflex was RICE — Rest, Ice, Compression, Elevation. It came from a 1978 book by Dr. Gabe Mirkin and became gospel in every locker room and training room. There's just one problem: in 2015, Dr. Mirkin himself walked it back.
Here's why the thinking changed. When you ice, blood vessels constrict — that numbs pain and limits swelling, which feels like progress. But the inflammatory response you're shutting down isn't a malfunction. It's your body's repair crew clocking in. Inflammation is how white blood cells, growth factors, and satellite cells reach the injury to rebuild it. Suppress it too hard, too long, and you can slow the very healing you're chasing.
Yes — but with a purpose and a timer. Ice is genuinely useful for short-term pain relief in the first day or two after an acute injury. The mental shift is understanding what it's for: managing symptoms, not accelerating repair.
Apply for 10–20 minutes, wrapped in a towel (never bare on skin), during the first 24–48 hours after an acute injury. Use it for pain, then move. Most people should transition from ice to gentle active rehab within 48–72 hours.
The framework that has largely taken over is PEACE & LOVE (introduced in the BJSM in 2019). It moves the focus from passively resting and icing toward protecting early, then loading and moving — because movement, not cold, is what drives recovery.
Heat runs the opposite direction from ice: it opens blood vessels, lifts circulation, relaxes muscle, and improves tissue elasticity. Wrong for a fresh, swollen injury — right for stiffness and chronic aches.
Never put heat on a fresh injury that's actively swelling. Heat drives more blood to the area, which makes swelling and inflammation worse in the acute phase. Wait until the initial swelling settles — usually after 72 hours.
Heat is at its best for chronic muscle tightness, arthritis stiffness, and warming up before activity or rehab. A common clinical move: heat before your exercises, when stiffness is the thing holding you back. The warmth lowers pain sensitivity and quiets muscle guarding, so you can move through the work that actually helps.
Use warm — not hot — heat for 15–20 minutes. Moist heat (a damp warm towel or moist pad) penetrates deeper than dry. Apply before movement or to unwind at day's end. Skip it on open wounds, numb areas, or anything actively swollen.
Standing at the freezer, unsure? Run these three questions.
Neither ice nor heat is a healing shortcut. Both are tools for managing symptoms so you can do the thing that genuinely drives recovery: move. Ice buys early pain relief. Heat loosens you up to work. But the real medicine is loading the tissue, restoring movement, and rebuilding strength — which is exactly what physical therapy is built to do.
Ice and heat are fine for everyday tweaks. But if pain is significant, isn't improving after a few days, involves trouble bearing weight, or keeps returning — that's the tissue telling you it needs more than a heating pad. A physical therapist can pin down what's actually driving the problem and build a plan to fix it, not just numb it.
At Root Physical Therapy, Washington's direct-access law means no referral needed to be seen. We're inside Root Strength gym in Georgetown, with a full training floor for the movement-based rehab the research keeps pointing back to.
General guidance based on current research — not individualized medical advice. If you have a serious injury or a condition affecting circulation or sensation, check with a healthcare professional before using ice or heat.
Still Not Sure?
Our Doctors of Physical Therapy will assess what's going on and build a plan that fixes it — not just masks it. Most major insurance accepted. Georgetown, Seattle.
BOOK AN ASSESSMENT →- Dubois B, Esculier JF. Soft-tissue injuries simply need PEACE and LOVE. British Journal of Sports Medicine. 2020;54(2):72–73.
- Critical review of cryotherapy and tissue regeneration. British Journal of Sports Medicine. 2024.
- Mirkin G. Revised position statement on ice and injury recovery, 2015.
- Wang ZR, Ni GX. Is it time to put traditional cold therapy in soft-tissue rehab out to pasture? World Journal of Clinical Cases. 2021;9(17):4116–4122.
- Malanga GA, Yan N, Stark J. Mechanisms and efficacy of heat and cold therapies for musculoskeletal injury. Postgraduate Medicine. 2015;127(1):57–65.
