Muscle loss is a natural part of aging, but having diabetes may increase the risk of losing muscle mass and strength. This can be especially important as we get older, since maintaining strong muscles supports balance, mobility, independence and overall health. The good news is that there are practical ways to protect and build muscle, including regular resistance exercise, adequate nutrition and good diabetes management.
Article Highlights
- Diabetes may increase the risk of muscle loss and weakness.
- Insulin resistance and high blood sugar can affect muscle health.
- Some weight-loss medications may reduce lean muscle mass.
- Exercise and adequate protein can help protect muscle.
Does having diabetes cause muscle loss?
Diabetes does not automatically cause muscle loss, but people with diabetes may have a higher risk of losing muscle mass and strength. Insulin resistance, high blood sugar, inflammation, physical inactivity and aging may all contribute.
Why does diabetes increase the risk of muscle loss?
Insulin plays an important role in muscle protein metabolism. With insulin resistance, the body may not use insulin as effectively, which can affect muscle maintenance. High blood sugar and reduced physical activity may also contribute to muscle loss.
Can high blood sugar affect your muscles?
Yes. Persistently high blood sugar can contribute to metabolic changes that affect how muscles use glucose and other nutrients. Over time, diabetes-related changes combined with inactivity and aging may contribute to reduced muscle strength.
Can losing weight with diabetes cause muscle loss?
Yes. When you lose weight, some of the weight lost can come from lean tissue, including muscle. This is particularly important during substantial or rapid weight loss. Combining adequate protein with resistance exercise can help preserve muscle while losing body fat.
Do diabetes medications cause muscle loss?
Most diabetes medications do not directly cause muscle loss. However, some medications used to manage diabetes and weight can lead to significant weight loss, and some of the weight lost may come from lean muscle mass as well as body fat.
This is particularly relevant with GLP-1–based medications, such as semaglutide and tirzepatide, which can reduce appetite and lead to substantial weight loss. Studies have found that some people taking these medications lose lean mass during treatment. This does not necessarily mean the medication is damaging muscle; some loss of lean mass is common whenever people lose weight. The goal is to maximize fat loss while preserving as much muscle as possible.
If you are taking a medication that is helping you lose weight, don’t stop or change your medication because of concerns about muscle loss. Instead, talk with your healthcare provider about combining your treatment with resistance exercise, adequate protein and other strategies that can help maintain muscle mass and strength.
What are the signs that I may be losing muscle?
Signs can include increasing weakness, difficulty climbing stairs, getting up from a chair, carrying groceries or performing other everyday activities. Unintentional weight loss can also be a warning sign and should be discussed with your healthcare provider.
How can I prevent muscle loss with diabetes?
One of the best ways to protect your muscles is to combine resistance exercise with adequate nutrition. Resistance exercise—such as lifting weights, using resistance bands, doing body-weight exercises or using weight machines—signals your muscles to maintain and build strength.
Aim to include muscle-strengthening activities at least twice a week. Regular aerobic activity, such as walking, cycling or swimming, is also important for overall health and diabetes management.
Nutrition matters too. Include a source of protein at meals and choose nutritious foods that provide the vitamins, minerals and other nutrients your body needs. Good protein choices include fish, poultry, eggs, Greek yogurt, cottage cheese, tofu, beans, lentils, nuts and seeds.
If you are intentionally losing weight, particularly if you are losing weight quickly or taking a weight-management medication, pay extra attention to maintaining muscle. A dietitian or other healthcare professional can help you determine how much protein and physical activity are appropriate for you, particularly if you have kidney disease or another health condition that affects your nutritional needs.
Finally, managing your blood sugar is another important part of supporting overall health. Keeping your diabetes well managed, staying active and maintaining muscle strength can work together to support mobility, independence and healthy aging.
3-Step Action Plan To Protect Your Muscle
1. Start strength training.
Add 10–15 minutes of resistance exercise twice this week.
2. Prioritize protein.
Include a protein-rich food at each meal to support muscle health.
3. Track your strength.
Notice whether everyday activities like stairs and lifting are getting easier.
The good news is that muscle loss is not an inevitable part of having diabetes. By staying active, including resistance exercise, eating enough protein and managing blood sugar, you can take important steps to maintain muscle strength and support your overall health as you age.
