After Makan: Sit or Step? See What Happens to Your Glucose
I have a patient who wears a Continuous Glucose Monitoring (CGM) device. He told me:
“Every night after dinner, I walk up and down the stairs at home.”
He believes that this habit helps keep his glucose under control. Is he right?
What happens after we eat?
After a meal, carbohydrates are digested and broken down into glucose. This glucose enters our bloodstream, causing our glucose level to rise.
Our body then releases insulin, which helps move glucose from the bloodstream into our cells to be used or stored.
If we sit and rest immediately after eating, our muscles are relatively inactive. But when we start moving, our muscles require energy—and glucose is one of the energy sources they can use.
Does walking after a meal really help?
Yes, it can.
A study involving adults with type 2 diabetes found that taking a 10-minute walk after each main meal was more effective at lowering post-meal glucose than taking one 30-minute walk at another time of the day. The greatest benefit was observed after the evening meal, when carbohydrate intake was generally highest and participants tended to be less active.[¹]
The American Diabetes Association also recommends reducing prolonged sitting and breaking it up with light physical activity to support glucose management.[²]
Therefore, moving after dinner may genuinely help the body use glucose and reduce the post-meal glucose rise.
However, this does not mean glucose will not rise at all.
Does everyone respond in the same way?
No. Even when two people eat the same food and perform the same activity, their glucose responses may be different.
Food portion, carbohydrate content, sleep, stress, medication, insulin sensitivity, fitness level, and the timing and intensity of physical activity can all influence the result.
In addition, intense activity can sometimes cause glucose to rise temporarily because stress hormones signal the liver to release more glucose to supply the body with energy.[²]
This is where CGM can be useful.
What can CGM show us?
CGM measures glucose in the fluid beneath the skin and displays glucose readings and trends throughout the day.
It allows a person to observe:
- How glucose changes after a meal
- How high and how quickly it rises
- What happens after sitting compared with walking
- Whether different types of activity produce different responses
- How long glucose takes to return towards its earlier level
Instead of assuming that one method works for everyone, CGM allows us to learn from our individual patterns.
So, shall we sit or walk?
You do not need a strenuous workout after every meal. Even a short and comfortable walk can encourage your muscles to use glucose and may help moderate the post-meal glucose rise.
The most important lesson is this:
Every movement counts, but every body may respond differently.
CGM helps make these invisible responses visible, allowing us to better understand how our meals and movements influence our glucose patterns.
Together We Walk, Together We Build — a healthier community, one step at a time.
Safety reminder
People who use insulin or medication that may cause low glucose should speak with their healthcare professional before changing their exercise routine. Choose an activity that is safe and suitable for your fitness level. Stop exercising and seek assistance if you experience dizziness, weakness, chest discomfort, or feel unwell.
Sources:
-
Reynolds AN, Mann JI, Williams S, Venn BJ. “Advice to walk after meals is more effective for lowering postprandial glycaemia in type 2 diabetes mellitus.” Diabetologia. 2016. View the study on PubMed
-
Colberg SR, Sigal RJ, Yardley JE, et al. “Physical Activity/Exercise and Diabetes: A Position Statement of the American Diabetes Association.” Diabetes Care. 2016. Read the position statement
-
Zeevi D, Korem T, Zmora N, et al. “Personalized Nutrition by Prediction of Glycemic Responses.” Cell. 2015. View the study
