I recently went outside to do a bunch of yard work (mowing, moving debris) which at my house can be somewhat difficult work because
of the terrain. I was
out working
for about two hours, and when I was finished, I felt like I had a pretty good workout. I felt fine when I stopped.
anyway, an hour later my pulse was still about 115. Two hours later, my pulse was still about 115. Three hours later, its about 105. It wasn't until about 5 hours later that my pulse was back to its normal 74.