Should I exercise through pain?

How can I tell the difference between hurt and harm during exercise?

Pain is a protective signal, not a direct measure of damage, so a sore tendon or stiff back can hurt during exercise without being harmed by it. The useful question is how the pain behaves: whether it stays at a tolerable level, whether it eases once you stop, and whether you are back to your usual baseline by the next morning.

Harm looks different. It tends to show up as sharp or stabbing pain, a joint that swells, a limb that gives way, pain that is clearly worse the next day and the day after, or new numbness and tingling. Those patterns mean the load was more than the tissue could handle right now, and the plan needs to change.

How do physical therapists use a pain scale to set exercise limits?

Many therapists use a simple 0 to 10 scale and agree on a ceiling with you, often a mild to moderate level, then check what happens over the following 24 hours. This approach, sometimes called pain monitoring, grew out of tendon research and is now used widely for persistent joint, tendon and back pain. The exact ceiling is set for you after an examination.

A 2017 systematic review in the British Journal of Sports Medicine compared exercise where some pain was allowed with exercise kept pain-free in people with chronic musculoskeletal pain. Allowing pain gave a small short-term advantage and no clear difference later on, which suggests mild pain during rehab need not be a barrier. The list below shows how responses are commonly read.

• Pain stays at or below the agreed level and is gone or back to baseline by morning: keep going, progress gradually
• Pain goes above the agreed level during the set but settles by morning: keep the exercise, reduce weight, range or reps
• Pain is higher the next morning than usual: drop back to the last dose that felt fine
• Pain keeps climbing session after session: stop progressing and have it reassessed

Which kinds of pain mean I should stop exercising right away?

Stop, and get checked if it does not settle quickly, when pain is sudden and sharp, comes with a pop or tearing feeling, or arrives with any of the signs below. These are not the slow, familiar ache of a sensitive tendon; they point to something that needs a different plan, and occasionally to something that needs a physician.

If one of these appears, end the session and note exactly what you were doing when it started: the exercise, the weight, the position and the rep. That detail gives a therapist or physician far more to work with than a general report that it hurt.

• A pop or tearing sensation followed by swelling or bruising
• A joint that locks, catches or gives way
• New numbness, tingling or weakness spreading down an arm or leg
• Chest pain, unusual breathlessness, dizziness or a racing heartbeat
• Calf pain with swelling and warmth, especially after surgery or a long trip
• Pain at night that does not change with position, with fever or weight loss

Does pushing through pain work differently after surgery or a new injury?

Yes. In the days after a fresh strain or sprain, and throughout early recovery from an operation, healing tissue has limits that pain does not always announce. A repaired tendon or new ligament graft can be loaded too early without much warning, which is why your surgeon’s protocol sets ranges and timelines that override how the area feels.

Early after surgery, some discomfort during range-of-motion work is expected and usually necessary, but you work within the protocol rather than pushing to see what happens. If you are in rehab now, the explanation of why physical therapy can make pain worse at first and the guide to soreness after a session cover the normal patterns in more detail.

How can I keep training around a sore spot instead of stopping completely?

Change one thing at a time, such as weight, range of motion, speed, or how many days in a row you train, rather than stopping everything. A runner building toward the Carmel Marathon in April with an irritable Achilles might keep easy miles on the Monon Trail, slow the tempo of calf raises and drop hill work for a few weeks. A pickleball player with a cranky elbow might keep drilling footwork while shortening match play.

Complete rest often makes the eventual return harder, because the tissue loses tolerance. If you cannot find a level that settles by the next day, or pain has hung around for months, physical therapy for tendinitis or for chronic pain can set the dose. The two-minute questionnaire lets the matching team propose a therapist in the network.