u/itbeathrowaway_1

I’m 24 male, I have been trying to increase my running by watching my heart rate. Maybe 4-5 months ago I was able to run 10 miles 5 mph with an avg heart rate in the high 160’s and low 170’s. I got an injury, recovered, and started to run again (maybe a month ago only on the treadmill) and this time I was actually looking at my heart rate and learned about 2-3 weeks ago I can run 3.8 mph for an hour staying in heart rate zone 1-2 but recently my heart is going higher and higher (though still a gradual increase) until today I could only run 25 minutes before approaching zone 3. I have pictures from about the last two weeks (I donated platelets plasma a bit more than two weeks ago) of my Apple Watch heart rate monitor of the runs if needed.

I’m 24 male, I have been trying to increase my running by watching my heart rate. Maybe 4-5 months ago I was able to run 10 miles 5 mph with an avg heart rate in the high 160’s and low 170’s. I got an injury, recovered, and started to run again (maybe a month ago only on the treadmill) and this time I was actually looking at my heart rate and learned about 2-3 weeks ago I can run 3.8 mph for an hour staying in heart rate zone 1-2 but recently my heart is going higher and higher (though still a gradual increase) until today I could only run 25 minutes before approaching zone 3. I have pictures from about the last two weeks (I donated platelets plasma a bit more than two weeks ago) of my Apple Watch heart rate monitor of the runs if needed. I’m worried my heart is very unhealthy and getting worse but I don’t feel any dizziness, pain, etc.