Schlafschaf

Bei Sufferfest gibt es ne Einheit (Butter) die einigermaßen ähnlich ist glaube ich. Die 90s Intervalle sind auch so 110%. Da gibts etwas Theorie dazu, leider in Englisch:

Smooth like butter. Grace under pressure. It's what we're focusing on in this session as you accumulate plenty of time at a high aerobic workload. A good warm-up leads you into two sets of five 90-second intervals with 3-minutes of “recovery” between each. Instead of full gas intervals followed by super low intensity recovery, these efforts are hard, but the real sting (and training benefit) comes from the incomplete recovery you face between intervals. These “recovery” efforts are at the upper end of Z2, meaning you still need quite a bit of oxygen to keep that power churning. By keeping the intervals themselves under your Maximal Aerobic Power (MAP) AND not allowing complete recovery, your body will burn through your Anaerobic Capacity (AC) before the end of each set, forcing your body to produce that power aerobically. Your body goes through that same transition near the 3-minute mark of the 5-minute during Full Frontal, but with this session not only is it less painful, you end up with more total time in that aerobically dependent state. Endurance sports are all about churning through as much oxygen as possible, and few other workouts see you churning this hard and for this long.