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TL;DR
- Dinner was steak + white rice. Blood sugar peaked at just 137.
- Before eating: cabbage. After eating: 1 hour of swimming.
- This is the same day I hit 211 from pho at lunch. What changed wasn’t the menu โ it was what I ate before and what I did after.
Lunch pho sent my blood sugar to 211. Still 166 after two hours. The spike was alarming, but the fact that it wouldn’t come down was what really bothered me.
I wanted to try something different. So I decided to change how I ate dinner.
Dinner: Flap Steak + White Rice
6:17 PM. Dinner was flap steak and white rice. My usual meal โ I eat this about once a week.
White rice is in the mix. I just hit 211 from rice noodles at lunch. Would white rice be any different? Honestly, I wasn’t optimistic.
But after what happened at lunch, I changed two things:
- Ate cabbage before the meal. I knew dietary fiber slows carb absorption.
- Went swimming for an hour after eating. I swim regularly anyway, but today I had extra motivation: “They say exercise brings blood sugar down.”
Result: 137
I opened the app while showering after swimming.
Pre-meal 96 โ Peak 137 โ 2 hours later 96. “Blood sugar rose 41 mg/dL 75 minutes after the meal.”
Pre-meal 96. Peak 137. Two hours later, 96.
Only went up 41. Stayed within the normal range (under 140) and came right back to baseline.
Same day. Same body. Rice was involved. But compared to lunch, a completely different graph.
| Lunch (Pho) | Dinner (Steak + Rice) | |
|---|---|---|
| Pre-meal | 87 mg/dL | 96 mg/dL |
| Post-meal Peak | 211 mg/dL | 137 mg/dL |
| After 2 Hours | 166 mg/dL | 96 mg/dL |
| Spike | +125 mg/dL | +41 mg/dL |
The dinner menu was heavier. Steak and white rice has more calories. Yet the blood sugar response was dramatically lower.
What the Cabbage Did
From what I’ve read, eating fiber first slows down the absorption of carbs that come after. The cabbage seems to have acted as a kind of buffer.
Eating vegetables first. Seems like nothing, but the numbers told a different story.
What the Swimming Did
I’d heard that exercising after a meal helps bring blood sugar down faster. After an hour of swimming today, it dropped cleanly to 96.
Cabbage + swimming. I think this combination is what made 137 happen.
[!TIP] Eating fiber-rich foods like cabbage or salad before a meal slows carb absorption. Starting light cardio (walking, swimming) within 15-30 minutes after eating can lower blood sugar peaks. Combining both amplifies the effect.
The Full Day Graph
The red curve is my estimate of what blood sugar would have been without swimming. The orange is what actually happened. One hour of swimming made that difference.
Average blood sugar for the day: 104. If the red curve had played out, it could have blown past 200 like lunch. Swimming stopped that.
What You Eat vs How You Eat
Over two days, I’ve logged three meals: porridge, pho, steak with rice.
The one with the lowest blood sugar response was the heaviest meal. The menu didn’t change things โ eating fiber first and exercising after did.
It’s only been two days with the sensor, but one thing is clear: how you eat matters as much as what you eat. What goes in first and what you do after โ just those two variables, on the same day, in the same body, made this much difference.
Do I need to start carrying cabbage everywhere?