I just went running for a total of 17 minutes, NOT INTERVAL TRAINING. However, my heart rate (at 17yrs old) was at about 185 the whole time. Needless to say, I was hauling ass.
I know during HIIT you get your HR up really high… in interval fashion. But will going very very hard for a medium-length period of time (like what I did) be a viable substitute to interval sprinting? If not, why not? My HR got up to a peak of 197 (theoretically, at 17yrs old, my max should be around 203). Does this type of running have the same metabolic effect as interval training? If not, I’ll just do sprints, but I like this a lot more.