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![bryan_johnson Avatar](https://lunarcrush.com/gi/w:24/cr:twitter::17468569.png) Bryan Johnson [@bryan_johnson](/creator/twitter/bryan_johnson) on x 627K followers
Created: 2025-07-23 18:07:33 UTC

4/ I am measuring again in X weeks and report on continued recovery

I expect my motile count and motility to continue recovering over the next 2-4 weeks and back to the previous peak achieved following XX sessions. This is based on: 
+ Relative recovery already achieved in X week
+ No reduction in total sperm count and concentration,

Though this is not guaranteed since some evidence points at longer and non-linear recovery: 
+ Transient hyperthermia (testicular warming at 43°C for XX min) showed continued drop in sperm count and motility for up to X weeks post termination of daily heat exposure. ref
+ A case report showed significant decrease in total sperm counts on days 15,37, and 58, post-fever (keeping in mind fever does not compare well with transient heat exposure) Ref

Morphology will likely take longer to recover up to 2-3 months.

Several studies following heat exposure or fever indicated that morphology markers only recovered after a complete spermatogenic cycle (75 days).

![](https://pbs.twimg.com/media/Gwj6VhsbsAAQHhu.jpg)

XXXXXX engagements

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[Post Link](https://x.com/bryan_johnson/status/1948082572225077589)