Maximizing GLP Success with Lifestyle Medicine

HEALTH & WELLNESS

By Megan Wroe, MS, RD, CNE, CLEC

Few advances in healthcare have generated as much excitement in recent years as GLP/GIP medications for obesity treatment. In fact, it’s become difficult to have a conversation about weight without discussing these medications as they have completely transformed expectations around what is possible for people living with obesity. Obesity is now recognized as a chronic, relapsing, multifactorial disease that is not simply the result of poor choices or lack of willpower. Genetics, hormones, metabolism, environment, sleep, stress, medications, and socioeconomic factors all influence body weight fluctuations, and for the majority of individuals, lifestyle changes alone cannot overcome the powerful biological drive to defend excess weight. Even when lifestyle changes are successful in weight loss, it takes a significant amount of time and energy to reach goal weights and even more energy to maintain it. This is where weight loss medications like GLPs and GIPs show such incredible change in that they can override physiological pathways and drive weight change not only successfully but also fairly quickly.

Clinical trials such as the STEP program (which evaluated semaglutide) and the SURMOUNT program (which evaluated tirzepatide) have demonstrated average weight reductions of 15% to 25%, along with maintenance within 5% of loss when medication was continued. In addition to weight loss, participants in these trials experienced improvements in blood glucose control, blood pressure, physical function, and multiple markers of cardiometabolic health. These were important outcomes since body weight is not the only measure of health. It is very possible, in fact, to lose weight and yet still carry excessive amounts of inflammatory visceral fat and have insulin resistance that leads to metabolic dysfunction despite a healthy weight.

With all the success weight loss medications have shown in these trials and now in the public, there have been two concepts that are often overlooked. First, the weight loss and metabolic benefits of the medications were only sustained when the medication continued. Those who discontinued use of the medications showed almost complete regain within months alongside exacerbated metabolic risks, pointing to the absolute need for habit change during use of medication if there is any possibility of discontinuing the prescription. Second, the SURMOUNT 3 trial was the only one to show weight loss as high as 25% that lasted for 12 months or more, and this was the only trial to include lifestyle interventions before and during medication use. Read that last part again: the most significant weight changes occurred when medication was combined with lifestyle interventions from the get-go. In this article, we will look closer at this important distinction to include lifestyle medicine as a companion prescription to medication for the best possible outcomes.

Lifestyle Medicine as a Co-Rx

One of the biggest misconceptions surrounding GLP and GIP medications is that lifestyle changes become less important once medication begins. We see this all the time in our wellness center when clients start a fitness or nutrition program, but as soon as they start successfully losing weight with medication, we see them less often. It’s only human nature for motivation to do hard work to wane when outcomes are being seen without it. As seen in the studies, however, weight loss does not always mean that insulin resistance, muscle mass, visceral fat, and cardiometabolic markers are improving alongside it. This means that chronic conditions like diabetes and heart disease can still occur with weight loss. More importantly, the risk of these chronic conditions increases significantly if medications are discontinued, which is very common given the cost of these medications and the unpredictability of insurance coverage. All of the same lifestyle interventions we preach for prevention are therefore just as applicable and necessary when weight loss medications are working and, in some instances, may be even more critical in preserving lean mass and preventing sarcopenia.

Lifestyle Intervention 1: Physical Activity

Exercise remains one of the most powerful interventions available for improving health, regardless of weight. The cardiovascular benefits of meeting the 150-300 weekly minutes of moderate to vigorous movement cannot be understated. It is resistance training, however, that is particularly important during weight loss, and especially rapid weight loss, because it helps preserve lean muscle mass while stimulating strength and supporting bone health. There are many scare tactics in the media saying that weight loss medications cause unhealthy loss of lean mass, and this is a skewed version of the truth. Any rapid weight loss method will lead to loss of lean mass since you cannot lose weight from just fat. However, without resistance training, lean mass loss can be exacerbated, and with muscle being one of the most important organs for metabolic health, this can be a critical loss if not addressed. More importantly, if medications are discontinued and weight is regained after much lean mass has been lost, this can lead to a debilitating condition known as sarcopenic obesity where the body is unable to carry its load due to the unbalanced ratio of fat to muscle. Recommendations for exercise during weight loss are a bit more aggressive than for maintenance and are as follows:

• 3x per week resistance training minimum
• Greater than 150 min per week of moderate to vigorous physical activity

I highly recommend working with an exercise specialist during weight loss as fitness progression and safe movement will change consistently as body weight changes.

Lifestyle Intervention 2: Nutrition

Weight-loss medications are best known for reducing overall appetite and, for some, can cause some low-grade nausea. This makes it even more important to focus on nourishing food choices since dietary volume may be low and we want to prevent malnutrition. Rather than focusing solely on eating less, individuals benefit from eating strategically. Prioritizing adequate protein supports muscle preservation during weight loss, while fiber-rich foods improve satiety, digestive health, and blood sugar regulation. Fruits, vegetables, whole grains, legumes, healthy fats, and minimally processed foods provide the nutrients needed to support long-term health. Overall guidelines for weight loss are not that much different from the general population other than calories should be lower than during maintenance (which is not difficult when on GLP/GIPs) and protein and fiber should be the absolute priorities. Some general recommendations to follow:

• 30 g fiber per day minimum (this looks like 5-6 cups of plant foods)
• 1.2-1.6 g/kg ideal body weight per day
• Minimize ultra-processed foods, added sugar, and saturated fats

Lifestyle Intervention 3: Sleep

Sleep is frequently overlooked in weight management conversations, yet inadequate sleep influences hunger hormones, appetite regulation, insulin sensitivity, and food choices. Improving sleep quality can enhance both metabolic health and overall well-being while supporting adherence to other healthy habits. The overall guideline for adults is to achieve 7-9 hours of sleep.

Lifestyle Intervention 4: Stress Management

Chronic stress affects eating behaviors, physical activity, sleep, and metabolic health. When our bodies are in a state of stress, our blood pressure, blood sugar, insulin, heart rate, and oxidation all increase, while cognitive, digestive, and immune processes all decline. Developing a combination of both acute and long-term stress management strategies is key so that your body and mind learn to respond to stress positively over time, rather than accumulate inflammation and its byproducts which can also lead to excessive visceral fat. Mindfulness, breathing exercises, counseling, spending time in nature, or engaging in enjoyable hobbies can reduce stress while supporting healthier decision-making. Even better is when healthy habits are shared, since humans thrive on social connection and it’s so much easier to maintain health when those around you have similar goals. Walking groups, fitness classes, cooking with family, community wellness programs, and accountability partners all increase the likelihood that healthy behaviors become lasting habits rather than temporary changes.

Planning for Long-Term Success

One of the most common questions surrounding GLP/GIP medications is, “What happens if I stop taking them?” As mentioned earlier, research has shown that weight regain is common after discontinuing therapy. While this may sound discouraging, it’s actually consistent with our understanding of obesity as a chronic disease. Just as blood pressure rises when medication for hypertension is stopped, the biological drivers of weight regulation continue to exist after obesity medications are discontinued.

Weight regain should not be viewed as a personal failure, but rather as evidence that obesity requires ongoing management. Individuals who establish sustainable nutrition habits, maintain regular physical activity, preserve muscle mass, prioritize sleep, and build supportive social environments are better positioned to maintain improvements in metabolic health over time, independent of medication status. Even if body weight changes, healthy behaviors continue to reduce cardiovascular risk, improve physical function, and enhance overall quality of life. As such, lifestyle strategies should not be looked at as a backup plan only if medication is being discontinued, but should be an understood co-prescription so that long-term success can be a reality.

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SEPTEMBER:

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