Why building muscle is one of the best things you can do for your body

When most people think of muscle, they picture bodybuilders flexing on stage or athletes lifting heavy weights in the gym. But there’s a growing body of science showing that muscle is far more than a symbol of strength or vanity—it’s a key player in your long-term health.

Muscle mass affects everything from your blood sugar and metabolism to your bone density and aging process. And while cardio tends to get most of the attention when it comes to general health, building and maintaining muscle deserves just as much focus.

Let’s break down why.

1. You’ll Be Stronger—and More Independent

The most obvious benefit of building muscle is increased strength. But this strength isn’t just about lifting heavier at the gym. It’s about making daily tasks easier and safer—carrying groceries, lifting your child, climbing stairs, or rearranging furniture without hurting yourself.

“When you build muscle, you gain functional strength,” says certified personal trainer Anthony Moreno. “That means freedom—the ability to move through life on your own terms, without needing help for basic activities.”

Over time, this strength protects your quality of life. It gives you confidence and autonomy, especially as you age.

2. You Lower Your Risk of Injury

Muscles play a key role in supporting your joints and maintaining proper movement patterns. When they’re weak or imbalanced, other parts of your body—like your back or knees—tend to compensate, increasing the chance of strain or injury.

“Strong glutes and core muscles can offload stress from your lower back. Likewise, strong hamstrings protect your knees,” explains Brian Betancourt, a clinical exercise physiologist. “Gaining muscle improves posture, reduces the risk of falls, and preserves long-term joint health.”

That said, proper form is crucial. If you’re new to strength training, take it slow. Learn foundational movements first, and let your body adapt before pushing intensity.

3. You May Control Blood Sugar More Effectively

Muscle is your body’s most insulin-sensitive tissue. After you eat, a large portion of the glucose (sugar) in your bloodstream is absorbed by your muscles—either to be used for energy or stored for later.

The more muscle you have, the more efficiently your body can manage blood sugar. This improves insulin sensitivity and reduces your risk of developing type 2 diabetes.

What’s more, muscle doesn’t always need insulin to absorb glucose. During and after exercise, muscle tissue can pull in sugar on its own. That makes strength training a powerful tool for both preventing and managing diabetes.

4. You Burn More Calories—Even at Rest

Muscle is metabolically active. That means it burns calories, even when you’re not doing anything.

Estimates vary, but generally, one pound of muscle burns around 6–7 calories per day at rest—compared to 1–2 calories for a pound of fat. This might not sound like much, but over time, it adds up. Plus, after a strength training session, your metabolism stays elevated for up to 48 hours as your body recovers and repairs muscle tissue.

More importantly, muscle improves your body’s ability to use different fuel sources—carbs, fats, and stored glycogen—depending on the situation. This flexibility makes your energy levels more stable and helps prevent weight gain.

5. You’ll Likely Feel More Confident

Physical transformation is one part of the story—but there’s a mental shift too.

“Building muscle teaches people that they can do hard things. It’s not just about what you look like—it’s about who you become in the process,” says Milchu Perez, a personal trainer and mental health advocate. “That builds self-trust.”

Multiple studies back this up. People who lift weights regularly report higher self-esteem, better mood regulation, and stronger body awareness. The confidence you build in the gym tends to ripple out into other areas of life—your relationships, your career, your overall mindset.

6. You Strengthen Your Bones, Not Just Your Muscles

Muscles and bones work together. When you load your muscles through strength training, you also place healthy stress on your bones. This stimulates bone remodeling and increases bone mineral density—a key factor in preventing osteoporosis and fractures.

This is especially important as we age. Women, in particular, are at greater risk of bone loss after menopause, but both men and women benefit from early and consistent strength training.

“Think of lifting as an investment in your skeletal health,” says physical therapist Hiral Jain Surana. “It’s one of the best ways to keep your bones strong and your joints stable.”

7. You Age With More Strength and Resilience

Muscle mass is one of the strongest predictors of longevity and healthspan—the number of years you live in good health, not just how long you live. As we age, we naturally lose muscle unless we fight to maintain it. This condition, called sarcopenia, can lead to weakness, frailty, and a higher risk of injury or hospitalization.

Keri Howell, a certified personal trainer with decades of experience working with older adults, puts it simply: “If you want to stay independent and active in your 60s, 70s, or 80s—start building muscle now. It’s not optional. It’s essential.”

More muscle also improves immune function, helps you recover faster from illness, and supports brain health. If you’re thinking muscle-building sounds like a full-time job, don’t worry. You don’t need to become a bodybuilder or spend hours at the gym.

Here are simple, sustainable ways to get started:

1. Strength Train at Least Twice a Week
Focus on big compound movements that work multiple muscles at once—like squats, rows, pushups, and deadlifts. Bodyweight is fine at first; resistance bands or free weights can come later.

2. Eat Enough Protein
Aim for 0.7 to 1.0 grams of protein per pound of body weight per day. Spread it across meals. Lean meats, tofu, legumes, Greek yogurt, and protein shakes are all great options.

3. Rest and Recover
Muscles grow when you rest, not when you lift. Sleep 7–9 hours per night, and give yourself at least one rest day between strength sessions.

4. Track Progress by Strength, Not Size
Focus on how much stronger you’re getting. Can you do more reps? Lift more weight? Improve your form? These are the real markers of success—not just what you see in the mirror.

Building muscle isn’t about chasing a certain physique. It’s about creating a stronger, more capable version of yourself—one that can move with ease, manage stress better, and live independently for longer. So whether you're 25 or 65, sedentary or semi-active, it’s never too late to start. The goal isn’t perfection—it’s progression. Small steps, repeated with intention, are all it takes to build a body that supports your life. Your muscles don’t care how old you are. But your future self will thank you for caring now.