Guys I have a question about HR please: Since switching to a LCHF diet (about 100g of carbs) my HR has jumped by 10 bpm. So my usual aerobic Z2 training pace is now performed at this higher HR which suggests I’m now in Z3 tempo. However it seems that I have less cardiac drift and I’ve pushed out the decoupling at this pace (pre LCHF was at 90 mins) to the extent that if I’m on the bike for 3.30 hours I’m still at the same HR that I began the ride at. Could it be because I’m now burning fat but this is requiring more oxygen which is working my heart harder? And what are the performance implications of this?
Guys I have a question about HR please: Since switching to a LCHF diet (about 100g of carbs) my HR has jumped by 10 bpm. So my usual aerobic Z2 training pace is now performed at this higher HR which suggests I’m now in Z3 tempo. However it seems that I have less cardiac drift and I’ve pushed out the decoupling at this pace (pre LCHF was at 90 mins) to the extent that if I’m on the bike for 3.30 hours I’m still at the same HR that I began the ride at. Could it be because I’m now burning fat but this is requiring more oxygen which is working my heart harder? And what are the performance implications of this?