Improved sleep
The National Sleep Foundation’s 2013 poll found that people who take vigorous exercise, such as swimming, are almost twice as likely as non-exercisers to report, “I had a good night’s sleep”, every night, or almost every night. They are also the least likely to report sleep problems; more than two-thirds of vigorous exercisers say they rarely or never had symptoms commonly associated with insomnia, including waking up too early and not being able to get back to sleep and difficulty falling asleep.