My question is can anarobic and aerobic energy systems be activated simultaneously? Specificly I do anywhere from 45 minutes to an hour of what I would call somewhat high intensity but it's not exactly hiit. I do say 10 rounds of 3 minutes bouts at as high intensity as I can put out then rest for one minute. Would this activate both systems because it's higher heart rate then steady state zone 2 cardio ( possibly out of then aerobic zone) but I also have a higher work to rest ratio of 3:1 so there's not a lot of recovery time to get back to too low of a heart rate. I want to blend the two for time reasons and weather I don't feel like adding an extra half hour every day of jogging. I know you could shadow box along to a metronome and stay at a steady state but I'd rather not waste the half hour on just that.