Aotearoa / New Zealand

aerobic threshold

I had to remind myself what AT was as your explanation differed from my memory. AT is the limit at which you can do exercise for hours; you have used the the glycogen in your muscles (moved from anaerobic exercise to aerobic); this is where oxygen from your lungs is supplying your muscles along with the fuel. This is much slower then using the stored glycogen; you don't need to sprint to get to the AT; but you will get there much quicker if you do, consistent exercise at a lower level will use up the glycogen and force you into aerobic exercise mode.