Heart Rate Question
Three months ago I have started exercising and dieting. I do cardio 3-4 times a week by running on the treadmill at 4.9 mph. At first it was very hard. I started at 4.5 and I could barely run 5 mins without having to slow down to a 2.5 pace to catch my breath. Now I can run for 30 min without stopping. However, I turn…
