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Hello everyone! Today, I'm reporting on a day of intense blood sugar fluctuations, as captured by my CGM (Continuous Glucose Monitor) graph.
I'll look back at a day where my overconfidence of "I walked a lot, so I'll be fine!", combined with insulin timing and the actual meal choices, intricately conspired to create a spectacular blood sugar spike followed by a true blood sugar rollercoaster.
Blood Sugar Graph (CGM Data) from a Specific Day
(Graph image showing a sharp rise to nearly 300 mg/dL after 14:00, then a rapid drop to around 60 mg/dL around 22:00)
Timeline of Actions, Meals, and Insulin on This Day
- 10:00 〜 15:00 Long walk through Omotesando ~ Roppongi area (a solid 5 hours of walking)
- Around 12:00 (Lunch) Udon + Shirasu Don (Whitebait Bowl) at Udon Shiki Roppongi Pre-meal: Humalog 12 units
- 15:00 (Snack) Kurtosh + Coffee at Balaton Cafe in Omotesando
- Around 21:00 (Dinner) Low-carb meal (hot pot vegetables and pork) Pre-meal: Humalog 12 units + Tresiba 7 units
- Around 22:00 Blood sugar plummeted to around 60 mg/dL (entering the hypoglycemia zone)
- 22:30 (Rescue Snack) Consumed Ramune, half a Dekopon (tangerine), and 2 strawberries ➔ Successfully recovered afterwards
Why Did It Happen? Analyzing the Blood Sugar Rollercoaster Mechanism
The 5-hour walk depleted my body's glucose energy, leaving my cells in a "starved state" craving sugar. Pouring in "Kurtosh" – packed with sugar and flour, and absorbed at an ultra-fast pace – caused a furious blood sugar spike, shooting up to nearly 300 mg/dL.
I injected insulin before dinner, but since the side dish was a "hot pot" – an extremely low-carb meal – there was a critical lack of carbs to offset the insulin. Furthermore, the delayed effect of the 5-hour walk made the insulin several times more potent than usual, leading to a sudden drop to 60 mg/dL.
A Fine Play Against Hypoglycemia: My Rescue Snack Choices This Time
The Divine Relay: Ramune + Half Dekopon ➔ 2 Strawberries
As my blood sugar dropped to around 60 mg/dL and symptoms appeared, I initiated an emergency rescue with fast-acting Ramune (glucose tablets). Afterward, to prevent a "second dip" from the lingering insulin effect, I used the water and fiber from fruits to sustain a gradual sugar absorption. After the rescue snacks, my blood sugar nicely maintained a flat line around 80-90 mg/dL!
Future Strategies and Lessons Learned (Summary)
- Avoid the "first bite" of sweets after prolonged exercise: Have coffee as a latte, or eat some nuts or protein before the Kurtosh.
- Balance dinner menu and insulin on exercise days: If cutting carbs and only eating hot pot, discuss with your doctor to reduce insulin units. Alternatively, since it's after exercise, intentionally eat a moderate amount of rice to balance it out.
- Share data with your doctor: Discuss this valuable pattern data – "prolonged exercise + no-carb dinner + usual insulin units = hypoglycemia" – at your next appointment.
Editor's Recommended Blood Sugar Management & Useful Items
Shop Introduction and About "Kurtosh"
💡 Many people don't know it? What is "Kurtosh," a traditional Hungarian pastry?
The 3 PM snack I had at Balaton Cafe in Omotesando was "Kurtosh," a traditional Hungarian pastry. It's a unique sweet characterized by its chimney-like shape, made by wrapping rope-like dough around a cylinder and baking it.
The freshly baked dough is generously coated with sugar and cinnamon, making it incredibly delicious. However, its main components are "flour + butter + plenty of sugar," resulting in a very high carbohydrate content that can cause a dramatic blood sugar spike when eaten alone.
📸 You can see photos of the cafe's atmosphere and Kurtosh on Balaton Cafe's official Instagram!
➔ See Balaton Cafe Omotesando's Official Instagram Post Here
※Disclaimer / Please Note
This report is a personal experience and a reflection on blood sugar fluctuations. Individual differences exist in the pathology of diabetes and how insulin works. For adjustments to insulin units or dietary therapy, always consult your personal doctor and follow their instructions.
• Portion Sizes: The food portions and nutritional data featured in this blog are based on standard Japanese serving sizes, which may be smaller than typical Western servings.
• Net Carb Calculation: Net Carbs = Total Carbs - Dietary Fiber.
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*Medical Disclaimer: The content on this blog represents the author's personal records for informational purposes only. Always consult with your doctor.
