Notes
Doing some technique work. Did 100 100-ups (50 each leg) and 50 pawbacks (25 each leg).
Did a few intervals paying attention to posture, i.e. leaned forward, shoulders back, head neutral, foot strike back a bit.
Did 500m @ 4:25 regular posture ended with a 152 HR then did 500m @ 4:25 with modified posture and ended with a 151 HR. The effort felt a bit less with modified posture.
I'll try to incorporate the modified posture into my daily runs, do 1k regular, 1k modified to get used to it.