Exercises for knee injuries: what to do and what to avoid?

Receiving a diagnosis of a knee injury often raises an immediate question: should I continue exercising or is it better to stop completely?

For a long time, it was believed that rest was the main solution for knee problems. Today, science shows that, in most cases, properly prescribed exercises are part of the treatment and recovery.

This doesn’t mean that any exercise is indicated. Depending on the type of injury, some movements may be more appropriate than others.

In this article, you will understand which exercises are usually recommended and what precautions deserve attention during recovery.

Movement is important for recovery. Except in specific situations determined by a healthcare professional, absolute rest is rarely the best long-term strategy.

Lack of movement can contribute to:

  • Loss of muscle strength;
  • Reduced mobility;
  • Decreased functional capacity;
  • Greater difficulty returning to daily activities.

Therefore, many rehabilitation programs use progressive exercises to restore knee function.

What to do?

  1. Prioritize exercises that respect your pain tolerance

Recovery is generally more efficient when the applied load is appropriate to the current capacity of the tissue. Mild discomfort during some exercises may be acceptable in certain cases, but intense pain or a significant worsening of symptoms indicates that adjustments may be necessary.

  1. Strengthen the muscles of the lower limbs

Muscle strengthening is one of the most widely used strategies in knee rehabilitation programs.

Muscle groups frequently worked include:

  • Quadriceps;
  • Glutes;
  • Calves;
  • Hamstrings.

These muscles help absorb forces and improve functional capacity.

  1. Use gradual progression

Recovery does not usually happen linearly.

Therefore, increasing weight, volume, or intensity gradually is generally safer than trying to quickly regain lost conditioning.

  1. Staying physically active

Depending on the injury, activities such as walking, stationary cycling, and low-impact exercises can be used to maintain physical fitness during the recovery process.

What to avoid?

  1. Ignoring intense pain

One of the least recommended actions is trying to “force” the knee despite significant symptoms. Persisting in activities that significantly increase pain can hinder the recovery process.

  1. Increasing the load too quickly

Even when symptoms improve, the tissues may still be adapting. Sudden increases in training load are one of the most common causes of relapse.

  1. Comparing your recovery to that of others

Each injury has its own characteristics. Factors such as age, history of physical activity, type of injury, and general health condition influence recovery time.

  1. Completely avoid movement for extended periods

In many cases, prolonged inactivity can delay recovery by promoting loss of strength and reduced physical function.

Are there exercises that are prohibited for those with knee injuries?

Not always.

A common mistake is classifying certain exercises as “good” or “bad” for the knee. In practice, what usually determines whether an exercise will be suitable is:

  • The stage of recovery;
  • The load used;
  • The range of motion;
  • Individual tolerance.

Even exercises often considered problematic, such as squats, can be part of rehabilitation programs when properly adjusted. Examples of exercises frequently used depending on the clinical condition and the stage of recovery include:

  • Sit-to-stand exercises;
  • Partial squats;
  • Hip bridge;
  • Calf raises;
  • Low step-ups;
  • Stationary bike;
  • Progressive walking.

The choice should always consider individual needs.

Putting science into practice

Knee injury recovery generally involves muscle strengthening, gradual progression of loads, and maintaining movement within tolerable limits.

If you are looking for a structured routine to strengthen your knees and hips, you can check out this exercise program:

Remember that results may vary depending on individual condition and regularity of practice.

When to seek professional help?

It is important to seek professional evaluation when:

  • There is significant swelling;
  • The knee is locking or catching;
  • There is a feeling of instability;
  • Pain persists for several weeks;
  • Symptoms are limiting daily activities.

A proper evaluation can help identify which strategies are most appropriate for each situation.

Conclusion

In many knee injuries, exercise is part of the solution, not the problem.

The secret usually lies in choosing appropriate movements, respecting individual tolerance, and gradually increasing the load.

Instead of seeking “forbidden” or “miraculous” exercises, the most important thing is to develop a plan that allows you to regain strength, function, and confidence to return to your daily activities.

Reference

Fransen M, McConnell S, Harmer AR, Van der Esch M, Simic M, Bennell KL. Exercise for osteoarthritis of the knee: a Cochrane systematic review. Br J Sports Med. 2015;49(24):1554-1557.

Collins NJ, Barton CJ, van Middelkoop M, Callaghan MJ, Rathleff MS, Vicenzino B, et al. 2018

Consensus statement on exercise therapy and physical interventions for patellofemoral pain. Br J Sports Med. 2018;52(18):1170-1178.

Van Melick N, van Cingel REH, Brooijmans F, Neeter C, van Tienen T, Hullegie W, Nijhuis-van der Sanden MWG. Evidence-based clinical practice update: practice guidelines for anterior cruciate ligament rehabilitation. Br J Sports Med. 2016;50(24):1506-1515.

Smith BE, Selfe J, Thacker D, Hendrick P, Bateman M, Moffatt F, Rathleff MS, Smith TO, Logan P. Incidence and prevalence of patellofemoral pain: systematic review and meta-analysis. PLoS One. 2018;13(1):e0190892.

Bannuru RR, Osani MC, Vaysbrot EE, Arden NK, Bennell K, Bierma-Zeinstra SMA, et al. OARSI guidelines for the non-surgical management of knee, hip, and polyarticular osteoarthritis. Osteoarthritis Cartilage. 2019;27(11):1578-1589.

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