My heart gets like that when I'm dehydrated. I also get dizzy--hold onto the table because the world is spinning--spells. I also sense a higher RHR when I haven't had enough recovery. If it makes you feel better, I didn't experience those symptoms during a weeklong tour last year. I think all the sitting around after the ride helped me feel more rested.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher