another struggle 60r20 70% HRR

So this morning I went into the gym before work to get a 60r20 done - just about had time - HRR 70% and it was a struggle from the start - not because I physically found it hard - but because the HR rose and that meant the pace had to drop which then started playing on the mind - on a really good day I can get this done sub 1:50 pace - today wasn't a really good day but as opposed to recent days I stuck with it to the end which means I walk up to work with a small smile on my face

oh you may notice the pace increases about 15 minutes before the end - this tied in with it getting cooler in the gym as the two other users had left and the air con had caught up