Running (P tread) 30:00 5.05 km (5:56 / km) +40m5:43 / km ahr:137
Intermediate HIIT class. 6 wu walk to jog 1-2% grade, then 8x45sec run with pyramid fast walk recoveries 1:15 -45, then 8x 30sec 1:1 recovery at fast walk (4.8mph) with run speed up to 10mph; 486/273. Avg output = 4.5W/kg.
Walking20:00  2.0 km (10:00 / km) +30m9:18 / km
Wintry walk in the woods. Very pretty snow laden trees.
2 min wu then 2 hills in and out of saddle; 169/141
Hiking (P tread) 20:00 2.4 km (8:20 / km) +80m7:09 / km ahr:122
3 min wu then 2 hills up to 9% and 5mph with flat road recovery between; 265/221
I've noted this previously comparing running to cycling; here's another observation to support the fact that I am a more efficient runner/walker than cyclist. For same average HR =127 (and surrogate for VO2), under identical indoor conditions (ie room temp and fan at same setting) and back to back efforts, I get 50% greater average power output walking than cycling (221W vs 141W).