Easy progressive run this morning

This morning around 11:05 a.m. I went out for my run, a bit late than I wanted, ran without the watch and did 6 laps in the conservatory for 8.5k total untimed. The last 2.5k of the run were at a faster pace, I started the run very easy. I felt pretty good but the legs were a bit tired , the quads hurted a bit and the muscles around the calves loosen it up a bit. The weather was very very hot, I have to force myself to run predawn.
8.5k total without a watch.