I’m stuck walking, sometimes very slowly if there’s an incline.
That’s normal. Very few humans (maybe none?) can run uphill without being well above their anaerobic threshold. And as such, they can’t do it for very long.
Problem is these workouts take a very long time. There’s a 7 miler coming up on Tuesday and that sucker’s gunna take me 2-3 hours to complete depending on where I walk.
Hmmm… What are you training for? Can you do the seven miles in less-steep terrain? Is your terrain goal-event-specific? If so, maybe the goal needs to change?
Is all that “on my feet” time still recovery? Would I be better off doing these workouts in Z1?
Which plan is this? The prescription is seven miles of recovery? Normally I don’t specify the distance for recovery runs, just 45-60′ super duper easy. Maybe two in a day, depending on the athlete.