He studied 118 men with above-average sperm DNA damage and found the quality of their sperm increased significantly after they were told to ejaculate daily for seven days.

• 格里宁对118位男性进行了研究，这些男性的精子DNA受损程度高于平均水平。研究结果发现，在要求被调查者连续七天射精之后，他们的精子质量显著改善。