I never remember Charlie ever saying that two or more submax stimuli equated to a max stimuli in terms of adaption. Quite the opposite, as his aversion to intensive tempo attests. While he did say, and I would absolutely agree it does equate in terms of accumulated fatigue and the need for recovery, you can’t get what equates to a 100% max effort stimulus using multiple sub-max stimulus, especially if we’re equating sub-max to be <85%…I believe that goes for sprinting or weights.