Stress and Weight Gain – Is There A Connection

Stress affects both the mind and the body, and its physical effects can interfere with weight loss. When the body is under stress, it can make losing weight more difficult, even with healthy habits.

Updated for 2026

While you hear of some people losing weight during a stressful time, stress is more often a large contributor to weight gain. The causes behind weight gain related to stress are typically a combination of several factors, including hormones, psychological factors, and the lifestyle choices that an individual uses to cope with their stress.

Your Body’s Hormonal Reaction to Stress

When a stressful event occurs, be it a big project at work or a traffic jam, your body has a noticeable response. For most, you notice an immediate reaction, possibly akin to anxiety, with sweating, feeling flushed in your cheeks, or rapid heart rate. These are largely the result of your sympathetic nervous system activating and the release of hormones, namely epinephrine and norepinephrine. Typically, these two hormones cause short-term appetite suppression as they are preparing your body for the immediate, innate fight or flight response; the body prioritizes responding to the immediate threat over digestion. No one likes to run or fight on a full stomach!

Following this immediate rush comes cortisol, more commonly referred to as the “stress hormone.” It is intended to keep your body supplied with energy by increasing the amount of glucose available in the bloodstream and helping maintain that response if the stressful situation continues. During short-term stress, this is a normal and beneficial adaptation that helps you meet the body’s immediate energy demands. But chronic stress and the continued release of cortisol can increase appetite and cravings, particularly for calorie-dense, highly palatable foods.

Cortisol is the hormone that makes us want to comfort ourselves with high-calorie treats, making those foods more appealing in periods of ongoing stress and increasing the likelihood that we’ll reach for them. Over time, persistently elevated cortisol levels reduce insulin sensitivity. The combined increased cravings and excess calorie intake with an overtaxed pancreas can promote the storage of abdominal fat. (Insulin is secreted by the pancreas, and diabetes results when insulin resistance, or sensitivity, becomes so severe that your pancreas can no longer produce enough extra insulin to compensate.)

When our body reacts to stress, it is assuming that we need to use up a lot of calories, maybe even precious stored calories from fat, to deal with the stressful event; the body is mounting up for an intense expenditure of energy. In reality, the stressors in our modern lives are more often about traffic making us late rather than something threatening a deadly chase. You aren’t likely to burn many calories checking the clock while sitting in traffic. Despite the different stressors, the body’s classic response is the same. A cascade of hormones, peptides, and other molecules is released that cause the body to change how it handles and stores energy from food.¹ With modern stressors, the expected physical exertion often never comes, and repeated (i.e., chronic) stress activation can contribute to weight gain.

Time Crunches Lead to Shortcuts

For many of us, it never seems like there is enough time in the day to get it all done. This chronic time crunch not only leaves us feeling stressed constantly, but it also allows us to fall into traps of convenience.

The truth is, making healthy choices often requires planning ahead. Without preparation, we are apt to choose the quick, available snacks. When the vending machine is your source of sustenance, you are less likely to be choosing a high-fiber or protein-packed snack or meal replacement and more likely to end up with a sugary snack that will send your body on a blood sugar rollercoaster.

Exhausted from a long day and too tired to cook at home? Fast food to the rescue… Except for the fact that fast food is usually very high in calories, and especially saturated fats, sodium, and processed carbohydrates. Even opting for a “healthier” menu item can be a trap. A salad will likely be loaded with ingredients that do more harm than good for the waistline.

Another shortcut we often take is skipping meals altogether. Whether from being too wrapped up in a task to stop and recognize hunger cues or willfully ignoring them to steal a few minutes back for what needs to get done, it will end up hurting you. While the mantra that a reduction in calories leads to weight loss has pervaded society, we know that skipping meals leads to weight gain, both leading us to overeat when we do eat and disrupting our normal metabolism by telling our body that it isn’t going to be fed, so it should hold on to what it gets. Does “I can splurge on this double portion of creamy pasta, I haven’t eaten all day!” sound familiar?

Another thing we cheat ourselves on is adequate hydration. Many people only drink during meals, and often aren’t choosing good, old-fashioned water. If you are skipping meals during the day, you may also be skipping out on drinking as well. Caffeine is typically considered a friend of the stressed, as its stimulant qualities trick you into ignoring when your body needs rest and allow you to push through. Caffeine is a diuretic, meaning it is dehydrating, and many of the caffeine boosts we choose are also high in sugar and other additives. The crash that follows this bump is often harsh. Dehydration can lead to headaches and feeling sluggish, neither of which helps you to accomplish your tasks.

Cyclical Stress and Exhaustion

Stress is the gift that keeps on giving. It is not often a one-and-done situation. For most of us, we have both situational stressors and chronic stress. Furthering this cycle is that we often combat our stress with things likely to cause more stress down the road. Weight gain is a prime example of this.

If your main stressor is time, you take shortcuts and try to squeeze as much time from the day as possible. In doing this, you both exacerbate your stress and create unhealthy habits that cause stubborn weight gain. Now you have all of your same stressors, plus excess weight to address. How can you be expected to eat right and exercise when you’re already using up every possible minute? Your stress has given you something new to stress over.

Feeling exhausted yet? Sleep issues and stress go hand in hand for many. We know that stress can lead to lost sleep just as well as losing sleep can amplify stress. This not only causes your body to feel physically stressed, but with inadequate rest, you may also consume more calories during the day. (Not to mention staying up late leaves you more prone to midnight snacking.) To compound this, we too frequently cut our sleep short to squeeze more hours out of the day. Whether you are taking an hour from your morning rest to allow for an extra hour of work or to make up for squeezing in a social appointment later in the day, sometimes your body truly needs to rest and reset to best perform.

So, yes, stress can cause weight gain! Stay tuned for our next blog post on how to solve stress with today’s hectic lifestyles

Reference:

1. Heshmati, H. M., Luzi, L., Greenway, F. L., & Rebello, C. J. (2023). Editorial: Stress-induced weight changes. Frontiers in endocrinology, 14, 1209975. https://doi.org/10.3389/fendo.2023.1209975.