Bryan Johnson· Author
Sauna, without ice on the boys, devastated my fertility markers. Total Motile Count: –56% Concentration: –30% Motility: –50% Morphology: –48% Count: –9%
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We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
Sauna, without ice on the boys, devastated my fertility markers. Total Motile Count: –56% Concentration: –30% Motility: –50% Morphology: –48% Count: –9%
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Sauna, without ice on the boys, devastated my fertility markers. Total Motile Count: –56% Concentration: –30% Motility: –50% Morphology: –48% Count: –9%
How sauna heat temporarily damaged my sperm in two waves, and why Sauna without ice protection on the boys hit my fertility in two waves. First immediate, followed by partial recovery and then another dip, before full recovery occurred. The recovery then led to all-time high fertility markers. Immediate After 2 weeks without icing, my motility and total motile count dropped sharply, while total sperm count stayed the same. This reflects heat damaging the mature sperm already stored in the epididymis, where they sit for about two weeks before ejaculation. 4 weeks post re-icing: second wave of heat effects: large drop in count, motility. Heat reduced sperm count and motility by damaging early spermatogenesis (meiosis) and later maturation (morphological changes, tail formation, and cytoplasmic loss). This effect is delayed, as the reduced numbers of total and motile sperm from the heat-damaged "batches" only become evident after a couple of weeks of storage in the epididymis.
Sauna without icing severely reduced my fertility markers.
Latent hit to counts and motility: heat damages early spermatogenesis (meiosis) and later sperm maturation (morphological changes, tail formation, and cytoplasmic loss) leading to a reduction in sperm count and motility. The effect is latent because the "faulty batches" from heat exposure with fewer total and motile sperm are only apparent in test after being stored for a couple weeks in the epididymis.
devastating consequences, wiped out 50% of my fertility markers. Absolute disaster.
A 200° sauna with no ice protection led to a 50% reduction of my fertility markers across the board. So, boys, definitely ice your boys.
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