So I have been successfully Primal for a while now, but only on the dietary side.
Now I have decided to start becoming Primal lifestyle-wise, and for that I want to start practicing HIIT.
The problem is, I sincerely believe that if I sprint as fast as I can for 20 secs, I will die. While I walk around 30 mins a day at very fast pace, I haven't exercised "properly" in like a year.
Did any of you guys start doing HIIT from scratch? IF so, I'd love to hear about how you transitioned from being an (active) sedentary into a successful HIIT athlete.