The first one was a little tough but the remaining 2 felt great
Better than the other way around ;-) Probably means you should do a longer or more vigourous warmup. for z4 I like to do some strides first to get my legs going. Another nice workout this time of year is to do some z3 first. 2x3 z3 w/2 rec + 2x3 z4 w 3 rec
