30r20 75% - Choo Choo

That stung a little - you think being "75% HRR" that it won't be that tough - but to get these done right you need to pile the pressure on from the start to drive the HR up to speed - so I did that - but it felt like rowing through treacle! Think my issue at the moment is dealing with the carbon dioxide as I was blowing like a small choo choo train going up a steep hill lol still another box ticked

 70m less than yesterday morning for the same average HR though