The main factor improving sperm quality — physical activity

Researchers from the University of Adelaide have found that weight loss alone does not significantly improve sperm quality. Instead, a healthy diet and regular physical exercise enhance sperm motility and morphology even in men who remain overweight.

An analysis of 32 studies involving obese men from different countries showed that bariatric surgery and medication-based weight loss methods do not always lead to improvements in sperm quality and may even temporarily impair reproductive function due to nutrient deficiencies.

In contrast, men who improved their diet and increased their physical activity showed notable improvements in sperm quality — even without major weight loss.

Scientists concluded that for obese men, reproductive health depends more on maintaining a healthy lifestyle than simply losing weight. They also emphasized the need to study how modern weight-loss drugs, such as Ozempic, affect male fertility.