This was a bit of a tough week. I'd been feeling run down and fatigued for the past few days, but I stuggled on Tuesday's hill workout. My legs felt very heavy, and I was wheezing. Eventually, I got kicked out* of the workout by my teammates- a first.
(and by kicked out, I mean that when, after struggling up a hill, I gasped something about perhaps taking a few seconds to catch my breath, my teammates emphatically supported me and convinced me to drop. I have awesome teammates.)
There's many possible explanations for this, including the simplest (but oh so hard for us over-analytical types to accept) - it might just have been a bad workout. They happen.
But the same time there was a potential suspect. About 10 days ago I had doubled my dose of the drug I take for my Raynauds, Nifedipine. It's a calcium channel blocker that's very well tolerated by athletes, including a lot of runners, and so I hadn't been anticipating any issues with the increased dose (I've been doing really well on the lower dose - we just increased because I was still having a few Raynauds attacks).
However, there did seem to be a correlation between my increased dose and my dead legs and strained breathing - it was really within the past week or so that I had just been dragging a bit more each day - which matched the time I'd been on the increased dose. So, I contacted my doctor, and we dropped the dose back down to see what that did. In the days since, I've been feeling a bit better each day. Placebo effect? Who knows. In the end, doesn't matter that much - I just care about the end result.
I also got my ferritin checked again this week - I check it pretty regularly, both when I'm running well and when I'm not. And yup, it was down again. So, back on the iron supplements. When I was googling Nifedipine, I noted that it's now being researched as a possible treatment for iron overload in humans - it has been shown to cause iron loss in small animals. So maybe a connection between the increased dose and the drop in my iron. Or not. Who knows.
And even on the humidest or lead-leg-iest of days, it's damn good to be out there.
Dailies
Monday: In the morning, 1500 yards of easy swimming and a yoga class, also did some quick injury prevention
work and upper body strengthwork. Foam
rolling at night.
Tuesday: In the morning, 9.5
miles, including a workout of 5 hill repeats - nonstop circuit of up a hill for about 2 minutes, a 90 second easy
jog, a stride, and then some more easy jogging to the bottom (whole
circuit takes ~5 minutes). Followed with some injury prevention/leg strengthening work.
Foam rolling at night.
Wednesday: In the morning, 5.5
miles very easy (8:44 pace), followed by a yoga class. Later another 6.5 miles very easy (8:30). Massage at night.
Thursday: In the morning, 6.5
miles easy (8:39), followed by yoga and then a bit of upper body and injury prevention work. Foam rolling at night.
Friday: 10.5 miles, including a cruise interval workout of 1600, 3200, 1600 (6:27, 12:52 (6:27/6:25), and then 6:12). Followed with injury prevention work and 1500 yards easy swimming. Foam rolling in the afternoon.
Saturday: 10 miles aerobic (8:14); later did some upper
body and injury prevention work, plus swam 1000 very easy yards to cool off. Foam
rolling in afternoon.
Sunday: 14
miles. Can't really call it progression - though I started in the 9:00s and ended at about 7:30 pace, I had to take several breaks to catch my breath. File this one under got it done. Followed with a
yoga class. Foam
rolling in the evening
From what I know about nifedipine's effect on iron, it shouldn't cause anemia, since it mobilizes stored (excess) iron - but I will do some research and get back to you if I find anything. Exercise intolerance though? That's definitely the nifedipine!
ReplyDeleteHuge thanks - I really appreciate your expertise. And....did another hill workout this morning (one week after cutting back on the Nifedipine), and I felt so.much.better even though it was significantly hotter and more humid. So Nifedipine definitely had something to do here.
DeleteIsn't serum ferritin stored iron?
Sunday was ... stifling.
ReplyDelete