What Tim Ferriss has said about Norwegian 4x4 interval training
1 quote · 1 episode · Jul 16, 2026
Tim Ferriss, American author, podcaster and investor, host of The Tim Ferriss Show, has been quoted on Norwegian 4x4 interval training once in 1 episode of The Tim Ferriss Show, most recently on July 16, 2026. Each quote below is verbatim and links to the moment it was said.
In their words
Ferriss said data suggest five to six months of thrice-weekly Norwegian 4x4 training produces brain volume changes lasting up to five years.
“if you do five to six months of gutting it out three times a week, the results... Holy shit. The dividends pay off for, it seems, up to or possibly beyond five years”
The Tim Ferriss Show: #875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday” (Jul 16, 2026) · Listen from 50:50
Episodes
#875: The Random Show — Tim and Kevin Talk Retreats, Mortality, AI Predictions, Supplements, Rock Climbing at (Almost) 50, and Not Waiting for “Someday”The Tim Ferriss Show · Jul 16, 2026 · 1 h 58 min
Tim Ferriss and Kevin Rose discuss Zen retreats, grief and mortality, rock climbing goals, supplements, psychedelic research, AI predictions and investing.
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