Returning to sport after an injury should be decided by whether you've passed step-by-step criteria, not by the day the pain disappeared. That is the core recommendation of a return-to-sport consensus statement written by 17 expert clinicians who met right after the First World Congress in Sports Physical Therapy in Bern, Switzerland, in November 2015 (Ardern et al., British Journal of Sports Medicine, 2016). The statement treats return to sport not as a single day but as a continuum that runs alongside recovery and rehab, and it proposes an evidence-based, graded progression. It applies just as much to everyday athletes who sprain an ankle or strain a hamstring and head straight back to the field simply because it no longer hurts.

An injured body is easier to injure again

Pain is only one of several signs of recovery. Even after the pain settles, strength, joint range of motion, and balance are often not fully back.

One sense that is typically slow to return is proprioception: the ability to feel where a joint is and at what angle without looking at it. If you cut sharply or land while this sense is still dulled, it's easy to hurt the same spot again.

The numbers back this up. A 2017 systematic review and meta-analysis by Toohey et al., published in the same journal, pooled 12 studies to look at the link between a previous injury and later lower-limb injuries. People with a history of ACL (anterior cruciate ligament) injury had about 2.25 times the risk of a later hamstring (back-of-thigh muscle) injury (pooled from 3 studies). A history of leg muscle injury was also linked to a higher risk of muscle injuries elsewhere. The researchers concluded that "previous injury, regardless of type, may increase the risk of a range of lower limb injuries."

Because these studies mostly involved athletes, the same ratios can't simply be applied to the general public. Still, the direction is clear: recovery includes the work of not getting hurt again.

Three stages: participation, sport, performance

The Bern statement divides return into three stages. The first is return to participation: you're taking part in rehab, training, or exercise, but you're not yet ready to go back to your own sport. The second is return to sport: you're playing your original sport again, but not yet at the level you want. The third is return to performance: you're back at or above your pre-injury level.

In rehab practice, this progression usually unfolds in order: protecting the injured tissue, building the muscle control that keeps the joint stable, balance and proprioception training, strength and power work, and finally practicing sport-specific movements. Cutting back the load or taking a short break when your body calls for it is also part of the process. In other words, it isn't a one-way road.

Criteria, not dates, for body and mind

The statement recommends "a graded, criterion-based progression that can be applied to any sport." Instead of "It's been a few weeks, so I should be fine," you check whether you've met set conditions at each stage. At the same time, the statement itself admits that many commonly used return criteria still rest on weak evidence.

Its comments on testing also stand out. Most functional tests are so-called closed tasks, where you repeat a predetermined movement. Real sport, though, is a string of open tasks where you have to react to an opponent or a ball. The statement says predetermined movement tests alone aren't enough and suggests adding reactive agility or change-of-direction tests.

Mental readiness counts as a criterion too. The statement notes that fear of reinjury, self-efficacy (believing you can do it), and motivation all affect return outcomes. Sometimes the body is ready but the mind hasn't caught up.

Movement screens such as the Functional Movement Screen (FMS) can also be useful reference points. If pain appears during the test, the rule is to stop and assess the cause rather than assign a score. A good score is no guarantee you'll avoid injury. It's just one piece of the picture.

• You have no pain in daily life or during light exercise.
• The injured joint moves through about the same range as the other side, without pain.
• There's no large strength difference between your two legs (or arms).
• You can do single-leg hops (for distance, repeated hops, etc.) steadily on both sides.
• You can perform the movements your sport demands, such as cutting, landing, and reacting to an opponent, without pain.
• Your confidence about returning outweighs your fear of reinjury.
• Swelling or pain doesn't increase the day after you exercise.

Author's note

Rereading the Bern statement, the word that caught my eye was "continuum." If you see return as a one-day event, the first pain-free day becomes your return date. If you see it as a continuum, that day is closer to the starting line.

From a chiropractic perspective, too, we look beyond whether there's pain to how the joint moves and how the body handles load and changes of direction. The starting point is comparing the injured side with the uninjured side. If you notice a difference, you're still somewhere in the middle of that continuum.

See a doctor first if…

• You suspect a broken bone (obvious deformity, can't bear weight, severe pain when pressing one specific spot)
• After a blow to the head, there was loss of consciousness, a seizure, confusion, balance problems, memory gaps, or unusual behavior
• After a neck injury, arm numbness or weakness persists or appears in both arms
• Your knee suddenly gives way, or it feels locked and won't straighten as if something is caught
• Without any specific injury, pain in the same spot on a bone gets worse the more you exercise and doesn't settle well with rest (possible stress fracture)

If you have any of the symptoms above, put off your return and get evaluated by a medical professional first. This is especially true if concussion is suspected. The consensus statement from the 6th International Conference on Concussion in Sport, held in Amsterdam in October 2022 (Patricios et al., BJSM, 2023), recommends that anyone showing signs such as loss of consciousness, seizure, confusion, impaired balance, behavioral change, or memory loss be removed from play immediately and not return to play or training that day. The return that follows is graded, with each step usually taking at least 24 hours. Later steps that carry a risk of head contact should only proceed once symptoms have fully resolved and a clinician has given clearance.

Before you return, try standing on one leg on the injured side. If it feels clearly different from the other side, there's no reason to rush.

This article is for general health information. Everyone's condition is different, so an accurate assessment requires consulting a professional.