Do Injuries Really Heal on Their Own? What Shoulder Pain Research Actually Tells Us

A 2004 study published in the Journal of Shoulder & Elbow Surgery revealed something interesting about shoulder pain. Researchers took 60 people with painful shoulders and split them into three groups for a 12-week treatment that included either:

 

 • physical therapy,
 • home exercise,
 • or a shoulder brace.

 

Here's what caught my attention: The home treatment group improved just as much as the physical therapy group.

 

Even more surprising? The shoulder brace group also got better—just as well.

 

Well, crap. Is that all it takes? A shoulder brace?

 

It seems that way at first glance. However, further assessment proves something we already know about the body: many injuries often improve on their own.

 

This is the concept of Natural History—how an injury heals over time with nothing more than rest and the body's repair process. That might sound like a weird message coming from a guy slinging shoulder bands for shoulder rehab, but it's the truth.

 

Here are some common injuries and their timelines for healing.

 

Ankle Sprain (Grade I–II)
Most mild to moderate sprains start feeling better in 1–2 weeks. But for a full ligament return to sport? That can take up to 6–12 weeks. 

 

Hamstring Strain
Light strains might feel fine in 2–3 weeks. Moderate to severe tears? You're looking at 6–8 weeks minimum. 

 

Rotator Cuff Tendinopathy
Pain might improve in a few weeks or drag out for 3–6 months or longer.

 

Surprisingly common and often scary, but most acute cases improve on their own in 4–6 weeks. 

 

So, if injuries can heal on their own, why bother with the exercise stuff at all? Because while "doing nothing" might work eventually, it's rarely the best option. 

 

 1. Pain-Free ≠ Full Recovery
Pain going away doesn't mean your body is back to normal. Extended time off without restoring strength, mobility, and coordination, you're often left with a weaker, less capable version of yourself—just waiting for the next setback.

 

2. Natural History Takes Time—Sometimes a Lot of It
Sure, the body can fix itself but often does so at a glacial pace. Targeted rehab may help accelerate the process, depending on the issue, but it also gives active people the satisfaction of keeping themselves moving and doing their body good. This is important for life satisfaction.

 

3. You Miss the Chance to Build Back Better
Rehab isn't just about healing, it can also be an opportunity to level up. It's a chance to address the weaknesses and come back stronger, more resilient, and less likely to end up here again.

 

4. It Builds Trust in the Body
Fear of movement is a huge roadblock in recovery. Gradual, progressive loading through exercise helps rebuild confidence, stop guarding, and start moving freely again.

 

5. Two-Steps is Back is Better Than Crawling
While it's normal to take a step back during the rehabilitation process, complete rest can significantly hinder your progress. Staying active in any way possible will help you be better prepared to resume activities when you're ready.

 

Overall, for most pain issues, time plus avoiding provocative movements equals progress. 

 

In the shoulder brace study, all participants were told to avoid overhead work and sports, and the rest period alone likely allowed inflammation to settle and the body to heal naturally.

 

So yes, the body has remarkable healing power if given time and the right environment—but that doesn't mean doing nothing is ideal.

 

Although, that means your shoulder rehab should be a bit more intensive than basic band rotations.  If you're still struggling with shoulder pain, stick to the 30-Day Shoulder Fix for a complete plan of attack.