Researchers examined whether walking for 10 minutes immediately after consuming glucose would improve post-meal blood sugar control more effectively than walking for 30 minutes starting half an hour after glucose intake.
Their findings indicate that both approaches improved blood sugar control compared to resting, but that the 10-minute walk immediately after glucose intake was uniquely effective at reducing peak glucose spikes.
Study
Building on previous studies, researchers from Ritsumeikan University aimed to determine whether a 10-minute walk taken immediately after glucose intake could be more effective than the commonly recommended 30-minute walk taken later. Their goal was to develop a straightforward and practical approach for enhancing post-meal blood sugar control.
The randomized trial involved 12 healthy young adults (6 female, 6 male; average age 20±1 years) who were nonsmokers and free from cardiovascular disease and diabetes. Participants completed three test conditions: resting (control), a 10-minute walk immediately after glucose intake, and a 30-minute walk beginning 30 minutes after glucose ingestion.
Participants walked at a self-selected, comfortable pace (average 3.8 km/h) on a treadmill, with the speed maintained consistently across both walking trials. A 75 g oral glucose tolerance test (OGTT) was administered in each session.
Each participant visited the lab four times, once for consent and baseline measurements, and three times for the experimental conditions. Each session began at 8:00 AM with a 20-minute seated rest, followed by baseline measurements of heart rate and blood glucose.
After consuming the glucose solution within one minute, participants either remained seated or walked, depending on the assigned condition. Blood glucose levels were recorded every 10 minutes for two hours using fingertip samples. Post-exercise measures included heart rate, perceived exertion (Borg scale 6-20), and gastrointestinal discomfort.
Results
The study found that both the 10-minute walk immediately after glucose intake and the 30-minute walk beginning 30 minutes later significantly reduced blood glucose area under the curve (AUC) and average blood glucose levels compared to the control (no walking) condition.
However, only the 10-minute walk significantly lowered peak blood glucose levels (164.3 mg/dL vs. the control's 181.9 mg/dL, p = 0.028) with a large effect size (d = 0.731). The 30-minute walk showed no significant reduction in peak levels (175.8 mg/dL vs. control, p = 0.184).
Participants rated the 10-minute walk as significantly easier (median RPE 7 vs. 9 for the 30-minute walk, p = 0.003). Heart rate increased during walking but did not differ significantly between conditions. Gastrointestinal discomfort was minimal and comparable between walking sessions.
Conclusion
Researchers found that a brief 10-minute walk immediately after glucose intake was uniquely effective at reducing peak glucose levels compared to both resting and a 30-minute delayed walk.
These results highlight the critical importance of timing, as starting exercise immediately after eating prevents the early glucose spike that typically peaks between 30 and 60 minutes post-meal. The 10-minute walk's significant effect on peak glucose reduction (d = 0.731) suggests clinical relevance for cardiovascular risk management.
The protocol was perceived as easier and caused minimal digestive discomfort, making it practical for busy lifestyles. The authors note that this aligns with Japan's "Plus Ten" health initiative, which promotes small daily activity increases.
While the study focused on healthy young adults, evidence from other research suggests the benefits may extend to older adults and those with metabolic risks. Limitations include the small, homogenous sample and the use of a glucose drink instead of a real meal.
Future studies should test this approach with mixed meals and in diverse populations, including those with glucose intolerance. Overall, this study supports a time-efficient strategy—walking briefly right after eating—to improve glycemic control in daily life.
Source:
https://www.news-medical.net/news/20250703/Short-walks-after-meals-deliver-big-benefits-for-blood-glucose.aspx