Run — easy
35 min — 7:19–7:55 /km
- Jog 35 min at 7:19–7:55 /km — slow enough to talk in full sentences the whole way
- Watch on: heart rate stays under ~150. Over it → walk 60 sec, resume slower. Walk breaks are this session done right, not failed
- Then 4 strides: 15–20 sec quick-but-smooth accelerations, walk back after each