To me, it seems running 1.5 hours of LSS twice a week (3 hours total), would indicate a higher potential level of cardiovascular fitness, as opposed to running, say, 0.5 hours of LSS six times a week (3 hours total). However, at least in strength training, there's something to be said for frequent, sub maximal lifting, rather than one chest or leg day a week.

Is there a point of equilibrium/crossover where longer duration, shorter frequency LSS runs become more beneficial than shorter duration, greater frequency LSS runs? Let's say, for purposes of the discussion, that the difference in recovery time between the two running schedules is negligible. For example, I can easily run 90 minutes and not feel it the next day.

I'm asking purely from a science/health perspective, not because of any training goal.