Correlating my sleep time and run fatigue

Frozen Fitbit

Today's run (street): 4.8 miles

Yesterday afternoon I checked my activity progress on the Fitbit only to discover that the readings hadn't changed since morning. The numbers displayed at 5:00 PM were almost the same as they were at 9:30 AM. I took some steps to see if they would record but the numbers didn't change. I connected the Fitbit to my laptop using the USB charging cable and that seemed to jolt it back to life.

I was happy that the device was working again, but disappointed that I wouldn't get "credit" for the steps, miles and flights of stairs that didn't get captured yesterday. I'll watch the display a little more closely, now that I've had that experience. It was working fine this morning and I took it along during my run.

I again recorded my sleep pattern overnight and saw that I'd slept a total of six hours. The good news was that I "only" woke up six times instead of twelve. The Fitbit site assigned me a sleep efficiency rating of 96%, far better than the first time I tracked my sleep cycle.

Perhaps it was a lack of sleep time that factored into the fatigue I felt during today's run. I'd averaged 40 more minutes of actual sleeping time prior to last night. After yesterday's rest day, I expected to feel slightly more energized than normal, but a few minutes into the run I knew something was missing. I set the best pace that I could, determined to cover my distance target of 4 miles.

When I run, I often think about racing and how I'd feel if I was in a race in that moment. I'll often tell myself that I could manage more speed, if needed. Depending on the distance, I can usually muster enough energy to pick up my speed and sustain a better pace. Today I hoped I had enough in the tank to get me through the route I'd planned.

I was determined to get in a full workout and, after making a few loops through my immediate neighborhood, I crossed into neighborhood #2. I had this dual sensation of feeling tired yet ready to cover my distance. There were a few points where I could have cut the run short, but I didn't. In fact I ended up running almost a mile longer than I expected. I was plenty tired by the time I got home and a little puzzled that my heart rate didn't reflect the perceived effort I was experiencing.

Tomorrow I may keep it short, as I'm close to reaching my weekly mileage goal. If my energy returns I may even do some speed work. I'll try to extend my sleep time 40 more minutes and get back to average. I think that contributed greatly to my tiring experience this morning.

Overnight surprise, courtesy of the Fitbit

Early to bed, early to rise. And rise and rise...

Today's run (treadmill): 3.2 miles

There was no question that I'd run inside today. It poured overnight and throughout the morning, so I headed upstairs to the treadmill after the kids left for school. Every time I use the stairs I think about the fact that the Fitbit is recording that metric. Yesterday I recorded over 14K steps, climbed 28 floors and traveled 7.4 miles. More interesting than that was what I learned about last night's sleep pattern.

The Fitbit has a wristband that holds the device while you sleep, allowing you to record your sleep and wake time. It also records the number of times you woke up during the night. According to the numbers, it took me 12 minutes to fall asleep and my total sleep time was 6 hours and 36 minutes. Now for the surprise: the data said I'd woken up 13 times between the time I put the device into record sleep mode and when I got up for the day. Strangely enough, the readout said I'd had 91% sleep efficiency. Really?

Perhaps we all wake up multiple times during the night and don't realize it. I do recall waking up a few times and looking at the clock before quickly falling back to sleep. The histogram shows that wake patterns seem to be grouped together, so that three or four "wake-ups" could happen in as many minutes. Either way, I didn't come close to sleeping through the night.

Despite the intermittent waking periods, I seem to be getting sufficient rest. Perhaps that speaks to the efficiency rating. Compared to my "pre-retirement" schedule back in January, I'm probably getting at least one hour's more sleep every night. In the days of 3:30 mornings, I used to have to steal naps on the train. With the 7+ hours of bed rest I've been getting overnight, I feel I have good energy throughout the day.