Slow start? Just press “play”. Listening to music for the first 
couple kilometres of a race can help you finish faster, a study from Brazil reveals. When racers slipped their earbuds in early, they shaved seconds off their times, but cranking music during the final leg had no impact. You can also Run 5kms In Less Than 25 Minutes by following these great tips. If you tune in before you feel tired, it’s easier to shift your focus from the burn to the beat, which can motivate you, says study author 
Dr Adriano Lima-Silva.