This is something which I knew at a practical level, but now, bingo, there is scientific evidence for it. With human sperm in a global crash, due to many factors such as testosterone-destroying chemicals, there is a need to devise strategies of lifting the counts. Now a study from researchers from Brigham and Women’s Hospital have found that men who regularly lift heavy objects at work have higher sperm counts, than men who are primarily sedentary, staring at computers all day. “Contrary to what some people remember from biology class, ‘male’ and ‘female’ hormones are found in both sexes, but in different amounts,” said Mínguez-Alarcón. “In this case, we hypothesize that excess testosterone is being converted into estrogen, which is a known way for the body to keep normal levels of both hormones.”
Heavy exercise, as in manual labour and weight lifting must therefore kicking to motion the male body’s natural testosterone production. The motto: lift, to lift!