Notes
Heart rate back to normal - I think it is the watch and temperature. the 645 has a better HR sensor but the GPS had some issues earlier this year. then i bought a used 45 - GPS more consistent but I don't think it has the best HR monitor. Either way this run was 5 miles of my hip flexors screaming but finally loosening up the back half. Another full week of mileage and then maybe a down week next week during Thanksgiving.
Left hip/side a little more grumpier as usual but nothing urgent.