Stop Guessing. Start Experimenting.

Key Takeaways

• A good experiment changes one variable at a time to help you identify which changes make the biggest difference in your glucose metabolism. 
• Experimenting with meal composition, meal timing, and different forms and timing of exercise and movement helps you identify which choices deliver the greatest benefits and which aren't worth the effort.

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Wearing a continuous glucose monitor (CGM) for the first time can feel like opening a firehose of data. Every meal, every walk, every night of sleep, and you're given a new glucose curve to try to decipher. While the sheer amount of data can initially feel overwhelming, Signos insights and activities provide a blueprint and a game plan for healthy changes that make a real, significant difference in your health. 

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Approaching a CGM and the data it generates as your own personal science lab can help you run experiments to understand how food, movement, and your habits affect your glucose and metabolism, so you can make choices that align with your goals. 

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While research provides a general understanding of how different foods, meal patterns, and exercises can affect metabolism, every person is unique. For example, one study found that some people experienced consistent glucose spikes after eating potatoes. In contrast, others were more likely to spike after eating rice or grapes, even though the foods contained the same amount of carbohydrate.¹

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CGM data can help you identify patterns, and running experiments with that data can help you better understand how foods, meal composition, timing, movement, sleep, and stress influence your unique metabolism. In this article, you'll learn what makes a good experiment and ways you can use Signos and your CGM data to make strategic changes that actually move the needle towards your goals. 

What Makes a Good Experiment

The best glucose experiments will change one variable at a time, to help pinpoint exactly what did or did not make a difference. This sounds obvious, but because we're monitoring our glucose and running these experiments while also living our day-to-day life, it's incredibly easy to accidentally test three things at once and have no idea which one mattered.

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A good experiment has three parts:

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• A clear question. Ask a specific question to get a specific answer. Instead of "Why does my glucose spike in the morning?" Try asking a more specific question, such as "Does replacing half of my oats with Greek yogurt change my glucose response?" or "What happens if I walk for 20 minutes after I finish breakfast?" 
• A controlled comparison. You need a baseline pattern, not a one-off glucose reading. That might mean eating dinner with 4 ounces of chicken, half a cup of white rice, and a side salad for 2 days in a row to assess consistency, then swapping the rice for sweet potatoes the next day to see what changes. Keeping the rest of the meal and your activity consistent while observing how your body responds to swapping white rice for sweet potatoes can give you better insight into the specific food's impact. 
• Multiple trials. Because your glucose can vary with sleep, stress, hydration, your menstrual cycle stage, and other factors, it's important to run an experiment more than once before drawing a conclusion. 

Within the Signos app, you'll work your way through activities that help you better understand how to interpret, learn from, and experiment with your movement and meals. 

Experimenting with Meal, Movement, & Timing Tests

While everything from sleep to stress affects your glucose metabolism, experimenting with diet and physical activity is often easier to control. The experiments we're covering in this article include what you eat, when you eat, and how and when you move your body. 

Experimenting with Meal Composition

Start with a baseline of meals you regularly eat and focus on one meal at a time. You'll want to change just one part of the meal to see how your response changes, then repeat the experiment once or twice more. 

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Adjust the protein

‍After a few days of eating the same snack or meal and tracking how your glucose responds, replace some of the carbohydrate with extra protein. Here are a few examples of what this could look like: 

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• Eat half as much oatmeal as you usually do and add a cup of Greek yogurt
• Add an ounce of almonds to your snack of grapes.
• Include an egg with your toast
• Add peanut butter to your square of dark chocolate
• Swap rice for beans (a protein-rich carb) in your burrito bowl
• Swap regular sweetened yogurt for higher-protein Greek

Change the carb‍

Swap a refined carb for a whole grain or starchy source and see what happens. You may find that your blood sugar responds differently to a grain that's left in its whole form, or to different types of carbohydrates, even if they contain the same number of grams of carbohydrate. Here are some potential swaps to experiment with:

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• White bread with whole-grain or sprouted-grain bread
• White rice with brown rice, quinoa, or farro
• Regular pasta with whole wheat, chickpea, or pea-protein pasta
• Sweetened cereal with unsweetened shredded wheat
• Sweetened fruit-flavored yogurt with plain yogurt plus fruit

Food order

‍Research suggests that eating vegetables and protein before carbohydrates improves glucose regulation and insulin sensitivity, and may even support weight loss without a conscious reduction in calories.^2,3,4 

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Put this to the test yourself by eating the same amounts of protein, vegetables, and carbohydrates in different orders and tracking your glucose curve. You can also test this by eating a piece of candy before a meal, then again after a meal on a different day, and comparing your glucose response. 

Experiment with Meal Timing

Your body's glucose response isn't static throughout the day. Circadian rhythms, cortisol patterns, and insulin sensitivity all shift from morning to night.

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Time of day‍

Understanding when your body processes carbohydrates most effectively can help you time your meals and snacks appropriately, limiting how often your blood glucose and insulin spike. Some people have better glucose tolerance in the mornings, but that isn't the case for everyone, as genetics, hormones, and metabolism all play a role.⁵ To test this, you can try eating the same meal or snack in the morning, then again in the evening, analyzing how much of an effect it has on your glucose. 

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Meal spacing‍

The time between your meals can also affect your overall glucose levels throughout the day. What happens when you space your meals apart by 4 hours versus 6 hours, or when you include a snack in between your meals? Monitor your glucose response and hunger levels as you evaluate different spacing patterns. 

Experiment with Movement and Exercise

Movement is one of the most powerful and immediate tools you can use to influence your blood glucose. Exercise can be done in the moment when you notice a rise starting, or planned in advance to support steady glucose levels later in the day. 

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While research shows that some forms of exercise can improve insulin sensitivity for up to 72 hours, movement can also have an immediate effect on glucose spikes, with even just a 10-minute walk after a meal effectively lowering peak glucose levels.^6,7

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But, to see for yourself how movement can influence your glucose levels, you can put it to the test with a little experiment. Try incorporating any of these movement activities into your day and tracking how they affect your glucose response. 

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• Walk briskly for 15 minutes before eating
• Walk briskly for 15 minutes after eating
• Wait 30 minutes after a meal, then go for a 15-minute brisk walk
• Do 15 minutes of strength training before eating
• Do 15 minutes of strength training after eating 
• Complete your cardio or strength workouts in the morning for one week
• Complete your cardio or strength workouts in the afternoons another week

By trialing each of these strategies multiple times and comparing them, you can identify which movement type and timing work best to improve your overall glucose response, as well as the optimal strategy to prevent a glucose spike before it occurs. 

Turning Insights Into Habits

Experimenting with CGM data can help you gather information to make strategic, intentional choices without overrestricting and focus your energy and attention on the activities that matter. 

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Once you've done a few experiments, you may start to see some obvious patterns. Maybe you've learned that doubling your protein at breakfast helps you feel more full and keeps your blood sugar stable throughout the morning, or that when you want to enjoy the occasional sweet after dinner, your body responds better when it's enjoyed after a meal of veggies and protein. 

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Now that you have all of this information, what do you do with it?

Start small

Don't try to test and implement too many things at once; besides making it harder to figure out what actually made a difference, changing your routine too much can feel overwhelming and hard to sustain. Choose one or two things you notice make a difference and get in the habit of regularly implementing them before moving on to something else. 

Avoid setting rigid rules

While you may find that a brisk walk after a meal helps lower your peak glucose, that doesn't mean you now have to follow up every meal with a walk. The same goes for foods that may cause a larger spike than others, or for eating food in a certain order. This information can guide your choices, but shouldn't create a set of rules you must follow at every meal, every day. 

Do occasional check-ins

What works now might not be the best option six months from now, as your body, metabolism, and circumstances change. Periodically experimenting again can provide extra insight into how your metabolism may be changing and help you continue to support your body in the best way possible, while leaving room for variety and fun. 

The Bottom Line

Using insights from Signos and experimenting with your CGM data can help you identify what makes the biggest difference in how your body processes glucose. Experimenting with different meal composition, timing, and movement activities, you can make strategic choices that make a real difference in your metabolic health and how you feel. 

Learn More With Signos’ Expert Advice

Signos can help you identify patterns and experiment to understand how your body responds to what you eat and how you move each day. With helpful tips on how to experiment with meals, timing, and exercise, you can make intentional decisions each day to support healthy glucose levels and your metabolic health.