Hey got a quck question about my heart rate during my HIIT training. I do a walk run combination. 1 min walk 1 min run for 30-35 minutes everyday. I noticed during running my heart rate climbs to 180 bpm. Now I was told that my heart rate should be 140-165. My question is it ok to 180 bpm when I am running or should I shoot for less than that. I never get below 150 bpm during my HIIT training. I do this cardio work 5 times a week. Any advice would be helpful. Thanks