Education

Red Light Therapy: What’s Supported, What Isn’t

Evidence label: Mixed, and narrower than advertised. Red light therapy has a real research base. It is just a much smaller one than the marketing implies, and it points at...

Massage Chairs: What the Trials Show

Evidence label: Mixed — small studies, real results, modest claims. Massage chairs sit at the practical end of this library. The research is not large, but what exists is randomized...

Contrast Therapy: Why Sauna and Cold Plunge Bel...

Evidence label: Well supported, for recovery specifically. Alternating heat and cold is the oldest idea in this library and one of the better-evidenced ones — provided you are clear about...

Cold Plunging: What the Research Supports, and ...

Evidence label: Mixed. Cold plunging is the modality where the gap between what is advertised and what has been measured is widest — in both directions. Some effects are larger...

Steam Rooms: What Humid Heat Does, Honestly

Evidence label: Thin. This is the shortest article in the library, and that is the finding. Steam has a long history and a devoted following, but it does not have...

Infrared Saunas: What’s Different, and What the...

Evidence label: Mixed. Infrared saunas are a genuinely different exposure from traditional saunas, with genuinely different — and thinner — evidence behind them. The most common error in this industry...