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Men who regularly lift or move heavy objects at work enjoy a 44% higher sperm count and a 46% higher sperm concentration compared with those who do not move heavy objects as part of their occupational activities. Harvard researchers studied 377 male partners of couples undergoing infertility workups and used surveys to elicit information about their physical activities during working hours.

The men had a median age of 36 years and were 87% caucasian. Of the group, 12% lifted or moved heavy objects occupationally, 6% noted heavy physical exertion at work but no interaction with weighty objects, and 9% had evening or rotating work shifts. The highest levels of physical exertion and working evening and/or rotating shifts were associated with not only more sperm both also higher testosterone and estradiol hormonal levels.

The study did not involve those who lift weights recreationally, but it stands to reason that men who work in offices could optimize their virility by bench pressing those pounds off hours.

https://academic.oup.com/humrep/advance-article-abstract/doi/10.1093/humrep/dead027/7034534?redirectedFrom=fulltext

#sperm #infertility #weightlifting #testosterone #exercise #nightshift