Cycling makes you sterile

False. This is a myth, but if you wear tight Lycra cycling shorts no one will ever have sex with you anyway, so it’s almost irrelevant. Spending 20 minutes on a bike at the gym three times a week will only do you good, but the key is to keep your exercise varied, so use the bike once a week, then do some resistance training, take a circuits class, walk the dog. Too much of anything could contribute to problems, so remember to keep your workouts and activity varied.