Now that my daughters are in summer camp, I have a little more flexibility in my schedule each day. As a result, I decided to try going to my strength training bootcamp class in the late afternoon rather than the evening yesterday. I know so many people who say that working out in the morning is the best for them, and well, late afternoon is the third-shift worker’s “morning” so it sounded like a good plan.

It wasn’t a good plan. OK, that’s not quite fair – it’s possible that working out at that time of the day is fine, but for whatever reason, yesterday did not work at all.

I ate a small meal with a glass of water an hour before my workout, just like I always do, and when I arrived at the gym I didn’t feel any different than normal. I signed in and began stretching, realizing I was a little tired but ready to get moving.

Class started and I made the decision to not push myself too hard. It’s been a busy week, so I used the 9lb hand weights instead of the 12lb ones. The first circuit was mostly lower body moves – I’ve got strong legs, so I had no reason to expect any difficulty. Jump squats, followed by twisting lunges, and then a wall sit (holding a 10lb weight for all of this) made up this circuit.

When we repeated the circuit, I found my balance was really off for the lunges: each time I lunged and twisted my upper body, it took a lot of effort to not fall over. I tried to slightly widen my stance, but still occasionally tipped over to the side and had to grab the wall for support. Balance has never been my strength, so I didn’t think anything of it.

During the second wall sit, though, I started to realize this was not going to be a good day. A wall sit usually doesn’t bother me. Sure, it burns, but nothing out of the ordinary. This time, my legs were practically vibrating with shaking as I tried to look at the TV on the wall and distract myself.

I took a few large sips from my Gatorade and tried to shake it off. I made it through the next circuit of moves (sumo squats, hip flexors, and dead lifts with bicep curls) twice, and while I was sweating hard, I didn’t feel that bad.

It was the next two circuits where something went wrong. At the end of the third circuit, I started to feel fuzzy-headed and a little sick to my stomach. I kept drinking my Gatorade, thinking I just needed a little burst of sugar to replenish my glycogen. Still, I kept going.

At this point my memory is very fuzzy. I remember sometime during the fourth circuit a weak sensation came over me. And then the next thing I remember is sitting on the floor with my back against the wall. Did I pass out? I don’t think so. But I definitely have a gap in my memory at that point.

I don’t remember how I got there. Apparently I quietly sat down, because the class would have stopped had I collapsed. After a minute or so, my trainer realized I wasn’t getting up and asked if I was OK. I mumbled something about being underslept and she instructed me to finish my Gatorade. I continued to sit there for a few more minutes, still wondering how I got to the floor and trying to piece together what had happened.

After I finished my Gatorade, I (foolishly) tried to get right back into the class. They were on abs, and I didn’t want to miss my ab work. I did one set of crunches before the dizzy/sick feeling came over me again. My heart was beating faster than the techno music from the classroom speakers. Having finished my first Gatorade, I was given a second one and told to rest. 

The workout was an epic fail. The remainder of the night I continued to be weak and foggy-headed, despite eating dinner and drinking plenty of water. I don’t appear to be coming down with any illness, so I can only guess that I somehow worked myself too hard, even though I wasn’t working as hard as I’ve done in the past.

Can the time of day really affect performance that dramatically? Or was I just having an off day? I’m not sure, but I’ve never had to quit in the middle of one of my classes, so something clearly wasn’t right.

I’m planning to take a few days of rest before attempting any further exercise. Maybe some extra sleep would be more useful than more workout time at the moment?