The quality of men's semen is deteriorating globally, which is generally referred to as an actual fertility crisis.

For some of the boys who are struggling, there may be some good news.

In a recent clinical investigation, researchers from the University of Copenhagen and the Hvidovre Hospital found that men who lose weight—and keep the weight off—have better sperm quality.

"We were surprised to see such a significant improvement in the semen quality associated with weight loss. And given that 18% of Danes are obese, this new information might potentially make a difference, according to Professor Signe Torekov, who led the study at the Novo Nordisk Foundation Center with Professor Romain Barres.

The new findings could be great news for fertility since it has already been established that an increase in sperm count is associated with a quicker time to pregnancy.

In the field of reproductive research, the esteemed magazine Human Reproduction, which published the study, is highly regarded. The study included 56 obese individuals aged 18 to 65 with a BMI between 32 and 43.

It's essential to lose weight steadily

It has long been recognized, according to Signe Torekov, that obesity is linked to poorer semen quality. She adds that although earlier research has revealed a connection between weight loss and improved semen quality, it has been challenging to draw firm conclusions from these studies due to their small sample sizes or relatively modest weight loss.

But now that we are prepared to accomplish it, In this first long-term randomized study, we have demonstrated that prolonged weight loss enhances the quality of semen in obese men, according to Signe Torekov of the Department of Biomedical Sciences.

"The guys shed an average of 16.5 kg, which eight weeks following the weight loss raised sperm concentration by 50% and sperm count by 40%. Following their weight loss, the males kept up their enhanced semen quality for the full 52 weeks of the trial. However, only the guys who kept off the weight saw a doubled sperm count a year later compared to before they lost the weight. The increases in semen quality were lost in the men who gained weight, she continues.

A portion of a larger investigation

The study is a part of a larger investigation into weight loss that was released in May 2021 in the New England Journal of Medicine. 215 obese Danes in total took part in the bigger study. 56 of the males from this group also gave semen samples to test the potential link between semen quality and weight loss.

All trial participants first adhered to a low-calorie eating program for eight weeks, which caused weight loss. The participants were then split up into four groups at random.

Two of the groups received a placebo while the other two received an anti-obesity drug. A minimum of 150 minutes of moderate physical activity each week, or 75 minutes of vigorous activity, or a combination of both, had to be completed by one of the two placebo groups.

The other group continued to exercise at their usual rate. The two treatment groups for obesity were split into two groups: one with and one without an exercise regimen.

It was discovered that after a year, both the groups that only exercised and received no medication, as well as the groups who only took obesity medicine and did not exercise, were still able to maintain their 13 kg weight loss. The group that exercised regularly and used obesity medicine shed more weight overall. The placebo group, who believed they were receiving medicine but did not exercise, had gained back half of the weight loss and had several of the risk factors for type 2 diabetes and cardiovascular disease aggravated.