I originally posted this in the health forum yesterday but got no response. It's now dropped to the bottom of the second page so I decided to give it one last try here:
Has anyone had any experience of running whilst taking beta-blockers?
I started running around mid April and am currently in training for the Great North Run and all’s been well so far with modest but satisfying progress.
However, I’ve recently noticed some strange patterns in my performance and I’m wondering if they could be to do with the beta-blockers that my GP prescribed for hypertension.
I’ve noticed that sometimes, my long run - 8 miles this week - feels great and I could carry on for miles. Other times the same distance (or even less!) feels like hell.
Until recently, I decided that it was ‘just one of those things’. That is, until I started wearing my HRM. I got the HRM years ago when I used to do a lot of cycling but I hadn’t worn it for running until a few weeks ago.
The pattern I’ve noticed is that on a long run, if my HR gets up to around 130-140 BPM, everything’s great and I feel like I could run forever.
On the runs when I feel like hell, my HR maxes out at around 110 BPM and I before long, my legs feel like lead, my lungs burn and I just have to walk.
This was particularly pronounced on my 8 mile run today. About 10 minutes before leaving for my run, I took a beta-blocker. For the first 3 miles at 10 minute mileing, my HR was 130-ish. After that, without any reduction in pace, it dropped until it stabilised at around 110 BPM. After 5 miles, increasingly tired, I had to do the rest of the session as a run/walk.
Within a minute of stopping, my HR was down to 97.
My theory is that on the days when I feel good, I’ve run early and therefore haven’t taken the beta-blocker until after the run. I’m tempted to experiment with not taking the beta-blocker until after I’ve run. Has anyone any ideas ?
BTW, I asked my GP if it's OK for me to run and swim and she said it is - however, she's not really a 'fan' of competetive activity in general.