Feet to Floor Phenomenon

Lately I’ve been experiencing the Feet to Floor Phenomenon and I want to know if anyone else experiences it too. Feet to Floor Phenomenon is exactly what it sounds like. A rise in blood glucose upon physically waking and standing up. Its cause is unknown and not everyone experiences it. It’s also not clear if it is related to the Dawn Phenomenon or not; however, I would surmise that it is different as this is essentially dependent on when you physically get out of bed.

Does anyone else experience the Feet to Floor Phenomenon? 

I do, but not always. And that is the really frustrating part; I can’t plan for it. I can’t set my basal rate higher, as it is dependent on when I physically get out of bed AND it doesn’t happen consistently.

I’ve noticed a few trends, but they are not even consistent. For example, when I do experience this phenomenon, it’s during the week when I’m getting ready for work in the morning. Weekends I have never experienced Feet to Floor.

Even during the week it is not promised. Take these two CGM graphs as an example, February 13th and 14th, respectively:

(Pictures taken upon arriving at work, after bike ride)

The first graph shows a steady glucose reading until about 7:20 (woke up at 7:00). Since I ride bike to work, I do not like to bolus until I’m physically at work in order to mitigate any lows from insulin and exercise. However, the bike ride spiked me even further. This is very rare and quite questionable. It’s also quite defeating to start the day with such an unexplained, silly, high blood sugar.

The second graph shows a steady glucose reading just like the other. A slight rise starting at 7:30, about 30 minutes after waking. However, this is the funky part; during my morning bike ride to work, my glucose levels started to drop. This is literally the complete opposite effect that I experienced the morning before. The conditions were the same. No active insulin for over 8 hours, no food, etc. How can there be such a big difference in results?

I would love to hear your take on the Feet to Floor Phenomenon. There’s not a lot of research done on it, so I rely on the expertise from my bellow diabesties!

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Just to note: I usually fast from 7pm until 12-noon the next day, so it’s safe to say that I KNOW it doesn’t happen every day. I’m not covering up a possible Feet to Floor spike with a breakfast bolus because I don’t eat breakfast (therefore no morning bolus).

4 Comments

  1. Happens to me too but also on weekends. Very intermittent. On a possibly related note, do you shower in the morning, every morning? (Not to get personal). I learned a while back (probably later than I should have) to take a small (1 unit for me) bolus before disconnection for a shower otherwise I spike a little. I doubt if it’s just the short disconnection/loss of basal but that combined with getting up and exerting energy (I’m usually running late at that point😔) I haven’t determined if the F2F phenomenon correlates with being unplugged for that short time.

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    1. I shower at night, almost habitually. I don’t think the small time being unplugged could cause a rise like that. A normal 5-10 minute shower wouldn’t do that. But bolusing before would help the blood circulation and help the insulin start working faster due to the hot water.

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  2. Yes I can relate to this! I seem to suffer more on a Monday morning with it too, although again no frequent pattern.

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