there's plenty of guide on zone2 and 3 toggling or run-walk for a month till u able to fully stay in zone. You can also get a simple HR tracker or HR chest strap (if u are serious about running). occasional zone5 can strengthen the heart and more effectively target visceral fat. anyway after you done your run for the next 48 hours, your resting respiratory rate will self-adjust depending on which type of training you went for..
I ❤️ Running on the trails in Taiwan before working out at Hypercore Gym 💪🏾🧡💯 Hopefully we can run together some time. 10km, 20km, 30km or 42km are fun & fine for me.