look, i'm not arguing whether it's more efficient nor do i personally care. but there is no debate that when you build a good base/endurance, you'll get more out of any high-intensity workout which is exactly what i'm aiming for once i remove my rear wheel and hook my bike up to my stationary come november. that is only a small part of my long term goal.
and yes, i'm aware of the efficiency of high intensity interval training but i'm also aware of how long the gains from such workout regimes last hence why i've been focusing on base building all summer. until then, i'll enjoy riding 100-150 miles through the city, suburbs and valleys at a relatively modest pace, efficiency be fucking damned. it's just, sometimes i want to blaze through them