New research suggests the amount a woman exercises each week can have a big impact on her sex life. In a study published in the Journal of Sexual Medicine, scientists studied 322 women in their mid-forties. They found that women who engaged in less than one hour of exercise each week had high levels of sexual dysfunction. But those who exercised more than six hours each week had worse sex lives as well, complaining of lack of interest, low arousal and failure to orgasm. Those women who averaged four to six hours of exercise weekly – or 35 to 50 minutes a day – had the highest levels of arousal and best chances of orgasm. Low sex drive is a common problem for many women, with studies showing it could affect one quarter to half of women.