Building and Keeping Muscle After 40
Muscle mass naturally declines with age, but strength training can slow and even reverse it. Learn how men over 40 can build muscle safely and effectively.
Key takeaways
- Adults can lose muscle mass and strength gradually starting in their 30s and 40s, a process that accelerates later in life.
- Strength training 2 to 3 times a week can build muscle at any age.
- Getting enough protein, spread across meals, supports muscle maintenance.
- Warm up well, progress gradually, and prioritize recovery to reduce injury risk.
If you've noticed that it's harder to stay strong than it was in your 20s, you're not imagining it. Starting in middle age, adults gradually lose muscle mass and strength. This age-related muscle loss, called sarcopenia when significant, can eventually affect mobility, balance, metabolism, and independence.
The encouraging news: muscles respond to training at every age. Research shows that adults in their 40s, 60s, and even 90s can build strength with regular resistance exercise.
Why muscle matters as you age
Maintaining muscle helps you:
- Stay strong and independent for everyday tasks
- Support a healthy metabolism and body composition
- Improve blood sugar control and reduce type 2 diabetes risk
- Protect bones and joints
- Improve balance and reduce fall risk later in life
- Boost mood, sleep, and energy
How much strength training do you need?
The Physical Activity Guidelines for Americans recommend muscle-strengthening activities for all major muscle groups on at least 2 days a week. For building muscle, many men do well with 2 to 4 sessions per week, depending on schedule and recovery.
The foundations of muscle building
1. Focus on compound movements
Exercises that work multiple joints and muscle groups give you the most benefit for your time:
- Squats (goblet squat, front squat, or back squat)
- Hip hinges (Romanian deadlift, kettlebell swing, or trap-bar deadlift)
- Pushing (push-ups, bench press, overhead press)
- Pulling (rows, pull-ups or lat pulldowns)
- Lunges and step-ups
- Carries (farmer's walks with dumbbells)
2. Use progressive overload
To keep building muscle, gradually increase the challenge over time by adding weight, reps, or sets, or by slowing down the movement.
3. Train with enough effort
Most sets should end with 1 to 3 reps "in the tank," meaning challenging but with good form. A rep range of 6 to 15 reps works well for building muscle.
4. Prioritize recovery
Recovery tends to take a bit longer as you age. Allow 48 hours before training the same muscle group hard, and don't skip rest days.
A sample twice-weekly routine
Perform 2 to 3 sets of 8 to 12 reps of each exercise.
| Workout A | Workout B |
|---|---|
| Goblet squat | Romanian deadlift (dumbbells) |
| Dumbbell bench press or push-ups | Overhead dumbbell press |
| One-arm dumbbell row | Lat pulldown or assisted pull-up |
| Reverse lunge | Step-ups |
| Plank (30–60 seconds) | Farmer's carry (30–40 yards) |
New to lifting? Start with our beginner strength routine, or consider a few sessions with a certified trainer to learn proper form.
Nutrition for muscle
Protein
Older adults may need more protein than younger adults to maintain muscle. Many experts suggest 1.0 to 1.2 grams per kilogram of body weight per day, with more for those training hard. Aim for about 25 to 40 grams per meal. Read more in how much protein do you need.
Overall calories
Eating too little makes it hard to build muscle. If you're trying to lose fat while preserving muscle, aim for a modest calorie deficit and keep protein high.
Vitamin D and other nutrients
Vitamin D supports muscle and bone health. Fruits, vegetables, and whole grains support overall recovery.
Don't forget the other pieces
- Cardio: Aim for 150 minutes of moderate activity weekly for heart health.
- Mobility: Stretching and mobility work help you move well and lift safely. See our mobility routine.
- Sleep: Muscle repair happens during sleep, so aim for 7 or more hours.
- Limit alcohol: Heavy drinking can interfere with muscle growth and recovery.
Training safely after 40
- Warm up for 5 to 10 minutes with light cardio and dynamic movements.
- Start lighter than you think and build up gradually.
- Prioritize form over heavier weights.
- Listen to your joints. Modify exercises that cause joint pain.
- Check with your doctor before starting if you have heart disease, high blood pressure, diabetes, or joint problems.
Stop exercising and seek medical help for chest pain, severe shortness of breath, dizziness, or an irregular heartbeat.
The bottom line
It's never too late to build strength. With consistent resistance training, adequate protein, and good recovery, men can maintain and even gain muscle well into their later decades, staying stronger and more independent for life.
Last reviewed and updated: June 7, 2026
This article is for general information only. It isn't medical advice and can't replace a visit with your doctor, pharmacist, or other licensed health professional who knows your history. Read our full medical disclaimer.
