Fertility
How does heat affect sperm?
A small sauna study, a review of cooling research and Bryan Johnson’s personal experiment. What each can tell us about sperm motility.
The science
Sauna science, explained.
Start with the question that matters to you. See who was studied, what changed and what remains unknown.
Read about heat and fertility
Recovery
Does sauna improve recovery?
What studies in basketball players and swimmers found, and why different heat protocols should be considered separately.
Reading the evidence
Read the result. Check the context.
Who took part?
One person or a group? Healthy adults or trained athletes? The answer affects how widely a result applies.
What was measured?
Sperm measures and sports performance answer different questions. Neither directly measures the chance of pregnancy.
Was our product tested?
None of these studies tested Arctic Nut. Heat and cooling research does not establish a benefit for this brief.
General education, not personal medical advice. The studies linked here have not tested Arctic Nut products.