The studies of beginners typically look at the impacts from under 100 total hours of practice—and as few as 7. The long-term group, mainly vipassana meditators, had a mean of 9,000 lifetime hours (the range ran from 1,000 to 10,000 hours and more). And the yogis studied in Richie’s lab, had all done at least one Tibetan-style three-year retreat, with lifetime hours up to Mingyur’s 62,000.
The studies of beginners typically look at the impacts from under 100 total hours of practice—and as few as 7. The long-term group, mainly vipassana meditators, had a mean of 9,000 lifetime hours (the range ran from 1,000 to 10,000 hours and more). And the yogis studied in Richie’s lab, had all done at least one Tibetan-style three-year retreat, with lifetime hours up to Mingyur's 62,000.

