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technique
Norwegian 4x4 Training
1 creator use or recommend it
▲ 1 active in the last 90 days
1 use
Last discussed Nov 11, 2026
High-intensity interval protocol of four 4-minute all-out intervals separated by 3-minute recoveries.
Recently discussed in
Q&A with Tim — How to Get Unstuck, Resilience in Hard Times, Tools for Brain Health, and More
Tim Ferriss · Nov 11, 2026
What creators say
Tim Ferriss
uses
Used for: Maintaining hippocampal volume and VO2 max as part of Alzheimer's prevention
Praised: Supported for maintaining hippocampal volume; improves VO2 max; durable chang...
vs: Contrasted with Zone 2 training for mitochondrial health
"Interval training. Dr. Tommy Wood and I talked about this at length. It remains, I think, one of the most interesting interventions that I've come across, certainly at least as supported for maintaining hippocampal volume in the brain. Doing this ..."
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