Understanding the Prevention and Recovery Implications of Being Fit

When most people think about the benefits of exercise, they think about losing weight, gaining muscle, improving cardiovascular fitness, or simply looking and feeling better.

But there may be a much bigger reason to stay physically active:

Being fit could potentially reduce your chances of developing certain health problems that eventually require major medical treatment—and in some situations, exercise-based treatment may even help people avoid or delay surgery.

That does not mean exercise makes you immune to disease, injury, cancer, or surgery. Genetics, age, accidents, environmental exposures, infections, and many other factors remain outside our control.

What fitness can do is improve many of the systems that influence our risk of chronic disease, physical disability, injury, and complications from medical treatment.

And if surgery eventually becomes necessary, entering that surgery with greater strength and cardiovascular fitness may give your body a better foundation for recovery.

So, can fitness actually help you avoid surgery or serious treatment?

In certain circumstances, yes—but the bigger story is how physical fitness changes the trajectory of your health before, during, and after a medical problem develops.

Fitness Is About More Than How You Look

It is easy to view fitness as something cosmetic.

We exercise to lose body fat.

We lift weights to build muscle.

We run or cycle to improve endurance.

But underneath those visible changes are adaptations occurring throughout the body.

Regular physical activity can improve:

• Cardiovascular fitness
• Skeletal muscle strength
• Insulin sensitivity and glucose regulation
• Blood pressure
• Body composition
• Bone health
• Functional mobility
• Balance and coordination
• Metabolic health
• Physical capacity and independence

These changes can have enormous consequences later in life.

The World Health Organization reports that regular physical activity contributes to the prevention and management of cardiovascular disease, cancer, diabetes, hypertension and other noncommunicable diseases.

WHO also estimates that people who are insufficiently active have a 20–30% greater risk of death compared with people who are sufficiently active.

In other words, exercise isn’t simply changing your body.

It is changing your risk profile.

How Fitness Could Help You Avoid Serious Medical Treatment

There are several different ways physical fitness can potentially reduce the likelihood of needing major medical intervention.

The first—and perhaps most important—is prevention.

1. Exercise Can Reduce Your Risk of Chronic Disease

Many serious medical treatments don’t begin with a sudden emergency.

They begin years earlier.

High blood pressure progresses.

Insulin resistance worsens.

Body fat accumulates.

Cardiovascular fitness declines.

Muscle mass decreases.

Mobility becomes more difficult.

Eventually, these changes can contribute to diseases that require medications, procedures, hospitalization, or surgery.

Regular exercise attacks several of these risk factors simultaneously.

According to the World Health Organization, regular physical activity helps prevent and manage conditions including:

• Heart disease
• Hypertension
• Stroke
• Type 2 diabetes
• Several cancers

Physical inactivity, meanwhile, contributes to metabolic risk factors including elevated blood pressure, excess body weight, elevated blood glucose and abnormal blood lipids.

This means one of the most powerful ways fitness may help you avoid serious treatment is surprisingly simple:

It may reduce your chances of developing the disease that requires the treatment in the first place.

Could Exercise Actually Help Someone Avoid Surgery?

Sometimes.

And orthopedic medicine provides a particularly interesting example.

Not every structural problem automatically requires an operation.

For certain musculoskeletal conditions, appropriately prescribed exercise and physical therapy can improve strength, movement and function enough that conservative treatment may be considered before surgery.

A fascinating example involves degenerative meniscal tears of the knee.

Researchers publishing in JAMA Network Open followed adults between 45 and 70 years old who had degenerative meniscal tears.

One group underwent arthroscopic partial meniscectomy surgery.

The other received exercise-based physical therapy.

After five years, researchers found that exercise-based physical therapy remained noninferior to surgery for patient-reported knee function.

The researchers concluded that physical therapy should be the preferred treatment over surgery for degenerative meniscal tears in the population studied.

Read the JAMA Network Open study

That doesn’t mean someone with knee pain should simply refuse surgery.

Some injuries and conditions absolutely require surgical intervention.

But it demonstrates an important principle:

A problem involving your joints, muscles or connective tissue does not automatically mean surgery is the only solution.

Improving strength, mobility, stability and movement capacity can sometimes be part of a conservative treatment strategy.

Strength Gives Your Body More Options

Imagine two people experiencing the same decline in knee function.

One has maintained strong quadriceps, hamstrings, glutes and surrounding musculature for decades.

The other has gradually lost muscle and physical capacity.

Their medical diagnosis may be similar.

Their functional starting points may be very different.

Muscle gives the body something extremely valuable:

physical reserve.

Strong muscles help us produce force, absorb force, stabilize joints and perform everyday movements.

This becomes increasingly important as we age.

Getting out of a chair, climbing stairs, carrying groceries, catching yourself when you stumble and getting off the floor all require muscular strength.

The goal of strength training isn’t simply to build bigger muscles.

It is to maintain your ability to physically interact with the world around you.

And maintaining that capacity may provide more conservative options when injuries or age-related changes eventually occur.

Fitness May Also Reduce Your Risk of Certain Cancers

Exercise isn’t only relevant to orthopedic health.

There is substantial research examining physical activity and cancer risk.

The National Cancer Institute reports strong evidence linking higher levels of physical activity with lower risks of several cancers.

For example, research summarized by the NCI has associated greater physical activity with approximately:

• 12–21% lower breast cancer risk among the most active women in a large meta-analysis
• 19% lower colon cancer risk among the most physically active individuals in another meta-analysis
• 20% lower endometrial cancer risk among highly active women in a meta-analysis
• Lower risks of several additional cancers

Researchers believe several mechanisms may contribute.

Physical activity can influence:

• Insulin levels
• Sex hormones
• Inflammation
• Immune function
• Body composition
• Gastrointestinal transit
• Obesity risk

More recent research has continued strengthening this relationship.

In 2025, the National Cancer Institute reported findings from more than 85,000 adults.

People with the greatest overall amount of daily physical activity had a 26% lower risk of developing 13 physical-activity-associated cancers compared with those recording the least activity during the study’s follow-up period.

Even daily step count was associated with risk.

Compared with people averaging 5,000 steps per day, cancer risk was:

11% lower around 7,000 steps per day

and

16% lower around 9,000 steps per day.

Importantly, these are associations and do not mean exercise guarantees cancer prevention.

But they illustrate why regular movement should be viewed as a component of long-term preventive health—not merely weight management.

What If You Still Need Surgery?

This is where the fitness conversation becomes especially interesting.

Being fit isn’t only potentially valuable for avoiding medical treatment.

It may also help prepare your body to tolerate treatment.

There is even a medical term for intentionally improving a patient’s physical condition before surgery:

Prehabilitation

Most people are familiar with rehabilitation—the process of rebuilding strength and function after surgery.

Prehabilitation flips that idea around.

Instead of waiting until after surgery to become stronger, patients improve their physical capacity before the operation takes place.

Prehabilitation programs can include:

• Aerobic exercise
• Resistance training
• Respiratory muscle training
• Nutritional interventions
• Psychological support
• Other individualized preparation

The goal is essentially to enter surgery with greater physiological reserve.

Does Prehabilitation Actually Work?

Research increasingly suggests that it can help, although results vary depending on the surgery, patient and program.

A large systematic review published in BMJ Open examined 178 randomized controlled trials involving preoperative interventions.

Researchers found that certain forms of prehabilitation reduced hospital length of stay and postoperative complications.

Exercise interventions were associated with a reduction in postoperative pulmonary complications in the studies analyzed.

Read the BMJ Open systematic review

Another systematic review and meta-analysis involving 2,070 patients undergoing major surgery examined preoperative exercise training.

Researchers found that preoperative exercise was associated with a substantially lower incidence of postoperative pulmonary complications.

Read the study through PubMed

A separate systematic review examining preoperative exercise found modest improvements in postoperative pain, function and quality of life following joint replacement surgery, particularly during the first months of recovery.

Read the systematic review through PubMed

More recent research published in The BMJ has continued examining how different combinations of exercise, nutrition and psychological preparation may improve surgical outcomes.

Explore the BMJ prehabilitation research

The evidence isn’t saying that exercise makes surgery easy or eliminates risk.

It suggests something much more practical:

The condition in which you enter surgery can influence the condition in which you come out of it.

Think of Fitness as Building a Physical Reserve

Fitness doesn’t guarantee that bad things won’t happen. It changes how prepared your body is when they do.

One helpful way to understand fitness is to think about it like saving money.

If an unexpected financial emergency happens, having savings doesn’t prevent the emergency.

But it gives you resources to deal with it.

Fitness works in a somewhat similar way.

Every workout can contribute to your physical reserve.

You build:

Muscle reserve.

Cardiovascular reserve.

Movement capacity.

Work capacity.

Balance and coordination.

Metabolic health.

You may never know exactly when those reserves will become important.

Maybe it’s when you’re 40 and injure your knee.

Maybe it’s when you’re 55 and your doctor becomes concerned about your blood sugar.

Maybe it’s when you’re 65 and preparing for joint replacement surgery.

Maybe it’s when you’re 75 and trying to maintain your independence.

Fitness doesn’t guarantee that bad things won’t happen.

It changes how prepared your body is when they do.

Fitness Can Also Make Recovery More Manageable

Consider what happens after many major procedures.

Patients may temporarily experience:

• Reduced mobility
• Decreased activity
• Muscle loss
• Reduced cardiovascular conditioning
• Difficulty performing everyday activities

If someone enters that period with very little muscle mass and poor cardiovascular fitness, losing additional capacity can become particularly problematic.

Someone beginning with greater physical capacity has more reserve to lose before everyday activities become difficult.

This is one reason maintaining muscle throughout adulthood is so important.

We shouldn’t wait until our physical capacity becomes medically necessary before deciding to build it.

Exercise Is Not a Replacement for Medical Care

This point deserves to be extremely clear.

Fitness should never be used as an excuse to avoid necessary medical treatment.

Exercise cannot fix every structural injury.

It cannot prevent every disease.

It cannot eliminate genetic risk.

And it certainly cannot replace emergency medical care, cancer treatment, necessary surgery or appropriately prescribed medications.

There are circumstances where surgery isn’t merely helpful—it may be lifesaving.

The goal should never be:

“How do I avoid doctors and surgery at all costs?”

A much healthier question is:

“How can I maintain my body so that I reduce preventable risk, preserve my options, and enter medical treatment as physically prepared as reasonably possible?”

That is where fitness becomes incredibly valuable.

So, How Fit Do You Need to Be?

Fortunately, health benefits don’t require becoming an elite athlete.

The World Health Organization recommends that most adults accumulate approximately:

150–300 minutes of moderate-intensity aerobic activity per week

or

75–150 minutes of vigorous aerobic activity

along with:

Muscle-strengthening exercise involving the major muscle groups at least twice per week.

That could mean:

• Strength training 2–4 days per week
• Regular walking
• Cycling
• Swimming
• Hiking
• Running
• Recreational sports
• Other forms of cardiovascular exercise

And importantly, you don’t have to become fit overnight.

For someone currently sedentary, gradually increasing activity can be an enormous improvement.

The Best Time to Build Strength Is Before You Need It

There is a tendency to think about our health reactively.

Our back starts hurting—then we think about strengthening it.

Our knees become weak—then we start exercising our legs.

Our blood pressure rises—then we start doing cardio.

A surgery gets scheduled—then we start thinking about getting healthier.

But fitness works best when it is built before the crisis arrives.

You don’t know exactly what physical challenge your body will encounter 10, 20 or 30 years from now.

What you can control is how prepared your body is when that day arrives.

The Bottom Line: Can Fitness Help You Avoid Surgery or Serious Treatment?

Potentially, yes.

Regular physical activity can reduce the risk of numerous chronic diseases. Exercise-based rehabilitation can sometimes serve as an effective alternative to surgery for specific musculoskeletal conditions. And when surgery is unavoidable, better physical preparation may improve certain recovery outcomes and reduce some postoperative complications.

But perhaps the biggest benefit of fitness isn’t simply avoiding treatment.

It’s resilience.

Building muscle, cardiovascular fitness, mobility and metabolic health gives your body a larger physical reserve from which to respond when illness, injury or surgery occurs.

You cannot exercise your way out of every medical problem.

But you can give your body more capacity to handle the problems that eventually come your way.

And that may be one of the most important reasons to stay fit.