Why Is Early Loading Important After Soft Tissue Injuries?

After a muscle strain, ankle ligament injury or tendon irritation, the first reaction is often to completely protect the injured body part. A person may avoid movement for several days and then feel afraid to start exercising again because even minor discomfort is interpreted as a sign that the tissue is still being damaged.

Initial protection after an acute injury can indeed be necessary. However, prolonged complete rest is not an optimal rehabilitation strategy for most mild to moderate soft tissue injuries. Muscles, ligaments and tendons need gradually introduced mechanical loading to restore movement, strength and the ability to tolerate the demands of everyday activity or sport.

Early loading does not mean exercising through sharp pain or returning to full sports training the day after an injury. It means introducing safe, controlled movement that is appropriate for the specific injury as early as reasonably possible, while continuing to protect the tissue from excessive loading.

What is a soft tissue injury?

Soft tissue injuries generally refer to damage involving:

• muscles;
• tendons;
• ligaments;
• fascia;
• joint capsules;
• other connective tissues.

An injury may occur suddenly, for example during sprinting, an awkward landing, a fall or a rapid change of direction. In other cases, tissue irritation develops gradually when repeated loading exceeds the ability of a particular muscle or tendon to recover.

Examples of acute soft tissue injuries include a hamstring strain, calf muscle tear, ankle ligament sprain and collateral ligament injury of the knee. Although all involve soft tissues, rehabilitation cannot be identical. Muscles, ligaments and tendons respond differently to stretching, contraction, compression and high-speed loading.

Why can prolonged complete rest delay recovery?

During the initial period after a more significant injury, it may be necessary to restrict loading and use crutches, a brace or another form of protection. This can reduce the risk of further injury and help control symptoms.

However, unnecessarily prolonged immobilisation can create several problems:

• muscle activation and strength decrease;
• joint range of motion can deteriorate;
• movement can become stiff and less confident;
• tissue tolerance to mechanical loading decreases;
• the person may lose confidence in using the injured body part;
• return to everyday activity and sport can take longer.

Experimental and clinical research generally supports appropriately controlled mobilisation rather than unnecessarily prolonged complete immobilisation after many muscle and ligament injuries.

In a randomised study involving 50 recreational athletes with acute thigh or calf muscle injuries, beginning rehabilitation two days after injury resulted in a faster return to full activity than beginning rehabilitation on day nine. This does not mean that every injury should be loaded after exactly two days, but it illustrates that unnecessarily delaying rehabilitation may not be beneficial.

What does early or optimal loading actually mean?

Optimal loading means providing enough mechanical stimulus to support recovery and maintain function without applying so much stress that it causes reinjury or a substantial increase in symptoms.

Early loading may include:

• gentle active movement;
• isometric muscle contractions;
• partial or full weight-bearing;
• controlled walking;
• simple strengthening exercises;
• gradual restoration of balance and movement control.

For example, after an ankle sprain, early loading may initially involve moving the ankle within a tolerable range, activating the calf muscles and walking with a brace or crutches when needed. It does not yet mean running, jumping or performing rapid changes of direction.

Read more about adapting training load and evaluating the response to exercise in our article about load management in sport and rehabilitation.

From RICE and POLICE to PEACE & LOVE

In the past, the RICE principle was frequently used after acute injuries:

• Rest;
• Ice;
• Compression;
• Elevation.

This was later followed by the POLICE principle, in which complete rest was replaced with Protection and Optimal Loading. More recently, the PEACE & LOVE framework has become widely recognised because it considers both the early protection phase and the subsequent rehabilitation process. It is not a strict protocol that applies identically to every injury, but it provides a useful framework for understanding the main principles of soft tissue injury management.

PEACE during the early period

Protect. Temporarily restrict movements and loading that cause sharp pain or may aggravate the injury.

Elevate. If significant swelling is present, the injured limb can periodically be kept in an elevated position.

Avoid unnecessary anti-inflammatory approaches. The inflammatory response is part of the normal healing process. The use of anti-inflammatory medication should be considered individually and discussed with a doctor or pharmacist when appropriate.

Compress. An elastic bandage or appropriate compression product can sometimes help manage swelling and improve comfort.

Educate. The person should understand what they can safely do, what should temporarily be avoided and how loading can gradually be resumed.

LOVE during subsequent rehabilitation

Load. Gradually restore movement and the tissue’s ability to tolerate mechanical loading.

Optimism. Fear of movement and the belief that every painful sensation represents new tissue damage can make returning to activity more difficult.

Vascularisation. Appropriate low-intensity aerobic activity can help maintain general fitness and gradually restore tolerance to physical activity.

Exercise. Restoring movement, strength, balance and functional capacity is a central part of rehabilitation.

How does mechanical loading help tissues recover?

Muscles, tendons and ligaments are not passive materials. Their cells respond to mechanical stress and convert that mechanical stimulus into biological signals. This process is known as mechanotransduction.

Appropriately dosed loading can help:

• organise newly formed tissue in relation to the direction of loading;
• maintain muscle activation;
• reduce unnecessary muscle atrophy;
• restore the mechanical tolerance of tendons and ligaments;
• improve movement coordination;
• gradually prepare tissues for greater loads.

In physiotherapy, using mechanical loading to promote tissue adaptation and recovery is sometimes referred to as mechanotherapy. The choice of exercise matters, but so do intensity, volume, frequency and the timing of progression.

Tissue-healing stages are not an exact calendar

Soft tissue healing is commonly described as three overlapping phases:

1. inflammation and initial protection;
2. new tissue formation or proliferation;
3. tissue remodelling and maturation.

These phases do not occur as clearly separated weeks on a calendar. New tissue formation may begin while swelling is still present, while remodelling can continue for several months after a person already feels almost normal during everyday activities.

For this reason, rehabilitation should not be progressed solely according to the number of days or weeks since the injury. It is also important to assess:

• pain and swelling;
• range of motion;
• ability to load the injured limb;
• muscle strength;
• movement quality;
• the response on the following day;
• the demands of the person’s activity or sport.

The old explanation that exercise is required to “break down” or “dissolve” scar tissue is not accurate. The aim of rehabilitation is to use appropriate loading to encourage tissue remodelling and restore functional capacity rather than mechanically destroying scar tissue.

Early loading after a muscle injury

After a muscle strain or smaller muscle tear, movements that reproduce the original injury mechanism should initially be avoided. For example, after an acute hamstring injury, maximal sprinting, aggressive stretching and large-range high-load eccentric exercises would not normally be introduced immediately.

Early rehabilitation may include:

• gentle muscle contractions in a shortened or neutral position;
• controlled movement within a tolerable range;
• walking if it can be performed without pronounced limping;
• training adjacent muscle groups;
• gradually increasing strength loading.

Later, rehabilitation can progress towards exercises at longer muscle lengths, eccentric loading, faster movements, running and sport-specific tasks.

Starting rehabilitation early does not mean progressing aggressively. For example, research on acute hamstring injuries found that introducing lengthening exercises earlier did not by itself result in a better outcome than introducing them later. This highlights that the important question is not only when rehabilitation begins, but also whether the selected exercise is appropriate for the stage of recovery.

Early loading after a ligament sprain

After a mild or moderate ligament sprain, protected weight-bearing and joint movement can often be resumed relatively early.

After a lateral ankle ligament sprain, clinical guidelines recommend using appropriate external support, such as a brace or tape, together with progressive weight-bearing according to injury severity and symptoms. A short period of immobilisation may be appropriate after a severe sprain, but prolonged immobilisation should generally be avoided when it is not required.

Rehabilitation progression commonly includes:

• restoring range of motion;
• restoring normal walking;
• strengthening the calf and foot muscles;
• single-leg balance;
• dynamic stability;
• jumping, landing and changing direction.

For a practical example, see our guide to ankle sprain rehabilitation and bracing.

Early loading for tendon problems

Tendon problems can differ considerably. Gradually developing tendinopathy is not the same condition as an acute partial or complete tendon rupture.

With tendinopathy, complete rest often reduces pain only temporarily but does not restore the tendon’s ability to tolerate load. Rehabilitation is generally based on controlled strength training together with a gradual return to running, jumping or another activity that previously provoked symptoms.

Loading after a sudden tendon injury should be approached more cautiously. If the injury involved a tearing or snapping sensation, sudden loss of strength, a palpable gap in the tissue or an inability to perform the usual movement, medical assessment is required first. After a complete Achilles, patellar, biceps or other tendon rupture, early loading should only be performed according to the specific treatment or postoperative protocol.

How can you tell whether the load is appropriate?

An appropriate rehabilitation load does not always have to be completely pain-free. Mild discomfort may sometimes be acceptable if it remains controlled and settles relatively quickly after the exercise.

It is useful to assess the response during three different periods:

During the exercise

The load is probably too high if sharp or rapidly increasing pain develops, movement mechanics change substantially or the person begins to compensate noticeably.

Immediately after exercise

Mild fatigue or sensitivity may be acceptable. However, there should not be rapidly increasing swelling, pronounced loss of strength or an inability to use the injured body part normally.

The following day

The next-day response can often provide more useful information than the sensation experienced during the session itself. If pain, stiffness or swelling is substantially greater than before exercise, the volume, intensity or difficulty of the exercise should be reduced.

There is no universal pain score that is appropriate for every type of injury. An acute muscle injury, ligament sprain and longstanding tendinopathy may respond differently to the same reported level of pain.

Read more about the difference between expected post-exercise soreness and a possible injury in our article Muscle Soreness After Exercise – DOMS or Injury?

A simple example of load progression

Rehabilitation stage	Main goal	Possible exercises
Initial protection	Control symptoms and prevent additional injury	Gentle active movement, isometric activation, protected walking
Restoring movement	Regain range of motion and normal everyday function	Mobility exercises, gait exercises, light strengthening
Building strength	Increase the tissue’s ability to tolerate loading	Progressive strengthening, increased range and resistance
Dynamic function	Prepare the body for fast and complex movement	Running, jumping, landing and changes of direction
Return to sport	Restore sport-specific performance	Sprinting, maximal strength, fatigue exposure and sport-specific situations

Progression to the next stage should not happen simply because a particular week has been reached. The person should demonstrate sufficient range of motion, strength, movement control and tolerance to loading.

Are ice and compression still useful?

Cold application may temporarily reduce pain and improve comfort, but it should not be considered the primary method of tissue healing. If cold is used, it should generally be applied for a limited period with a layer of material between the cold source and the skin, avoiding prolonged cooling or loss of skin sensation.

Compression and elevation can help manage swelling, particularly after a lower-limb injury. A brace can provide protection and help a person resume safe loading earlier, but it should not replace the restoration of movement, strength and balance.

The purpose of rehabilitation aids is to create conditions that support rehabilitation, not to replace rehabilitation.

When may early loading not be safe?

Early loading is not a universal instruction to begin exercising without an appropriate diagnosis. Medical assessment should be considered first if:

• there is visible deformity or a suspected fracture;
• it is impossible to bear weight through the leg after injury;
• the joint is locked or markedly unstable;
• swelling or bruising increases rapidly;
• there is sudden and pronounced loss of strength;
• a loud tearing or snapping sound occurred during the injury;
• a complete muscle or tendon rupture is suspected;
• the limb becomes cold, pale or numb;
• pain continues to increase rapidly;
• the injury occurred after surgery and loading is restricted by the surgeon’s protocol.

More severe ligament injuries, fractures, dislocations and complete tendon ruptures may require a longer protection or immobilisation period. Rehabilitation is often still introduced as early as safely possible, but the type and amount of loading depend on the diagnosis and treatment plan.

Early loading is not the same as an early return to sport

A person may begin simple rehabilitation exercises a few days after an injury while still being far from ready for running, contact training or competition.

Before returning safely to sport, it is important to restore:

• adequate range of motion;
• sufficient muscle strength;
• the ability to produce and absorb force;
• balance and movement control;
• running, jumping and change-of-direction capacity;
• sport-specific endurance;
• confidence in the injured body part.

A return-to-sport decision should not be based only on the absence of pain at rest. Read more about the relevant criteria in our article Return to Sport After Injury – When Is It Safe?.

Summary

After many mild and moderate muscle, ligament and tendon injuries, prolonged complete rest is not the best rehabilitation strategy. Initially, the injured tissue should be protected from additional damage, but controlled movement and progressive loading should then be introduced as early as reasonably appropriate. The amount of protection and load restriction also depends on the injured joint. For example, after a wrist sprain, the duration of brace use should be adapted according to injury severity, pain and joint stability.

Early loading helps maintain movement, muscle activation and confidence in using the injured body part. Rehabilitation can then progress from simple movement and isometric exercises towards strength training, running, jumping and sport-specific movements.

The goal is not to start as early as possible at any cost. The goal is to introduce the right load at the right time and adapt it to the diagnosis, symptoms and individual goals.

References

Dubois B, Esculier JF. Soft-tissue injuries simply need PEACE and LOVE. British Journal of Sports Medicine. 2020;54:72–73.

Khan KM, Scott A. Mechanotherapy: how physical therapists’ prescription of exercise promotes tissue repair. British Journal of Sports Medicine. 2009;43:247–252.

Bayer ML, Magnusson SP, Kjaer M. Early versus Delayed Rehabilitation after Acute Muscle Injury. New England Journal of Medicine. 2017;377:1300–1301.

Martin RL, et al. Ankle Stability and Movement Coordination Impairments: Lateral Ankle Ligament Sprains Revision 2021. Journal of Orthopaedic & Sports Physical Therapy. 2021;51:CPG1–CPG80.

Kannus P. Immobilization or early mobilization after an acute soft-tissue injury? The Physician and Sportsmedicine. 2000;28:55–63.

Vermeulen R, et al. Early versus delayed lengthening exercises for acute hamstring injury in male athletes. British Journal of Sports Medicine. 2022.

📖 Calf Muscle Tear – Symptoms, Treatment and Rehabilitation

📖 Balance Training – Why Is It Important and How Can You Improve It?

📖 Functional or Structural Scoliosis – What Is the Difference?

Can You Exercise After an Injury If There Is Still Some Pain?

Aigars Caune
Physiotherapist

Mild, controllable discomfort during rehabilitation does not necessarily mean that tissue is being damaged. The important points are that pain should not become sharp, substantially change the way you move or increase significantly after loading. If there is more swelling, stiffness or pain the following day than before the exercise session, the load should be reduced and the rehabilitation plan reassessed.

Looking for More Practical Physiotherapist Advice?

Visit our Physiotherapist Recommendations section for practical articles about exercise, injury prevention, pain management, load modification, rehabilitation principles and safely returning to everyday activities or sport.

View Physiotherapist Recommendations