Why is my HR so high
I'm training for my first half ironman distance, starting from what I believed was a pretty fit baseline. My max HR is pretty high just above 200 for both bike and run. I fond it so hard to maintain Z2 that often I find that I could br walking I'm going so slow. I've been following a training programme for about 6 weeks now and I dont feel that I'm seeing any difference and my VO2 max is just dropping. Where am I going wrong!?