@dr.lisa.dpt: As much as I love zone 2 running, its not for everyone. Zone 2 running has a ton of benefits, but if its ruining your runs and gives you more stress, youre a beginner runner or walking is zone 2, i recommend sticking with the RPE scale or rate of perceived exertion scale. Its a scale from 1-10 with 10 being a full on sprint. An easy pace on the RPE scale is about 3-4/10. #zone2running #8020running #runnergirl #heartratetraining #zone2cardio #runningtips #beginnerrunner