Exercise outdoors improves vitamin D levels and fitness.

Regular exercise, both moderate and vigorous, contributes to healthy hearts. Harvard researchers have found those who do vigorous exercise for three or more hours per week reduce their heart attack risk by 22%. This study also suggests it may be due in part to exposure to sunshine and the resulting increased vitamin D levels.

PositiveTip: Enjoy the double benefit of outdoor physical activity: Higher vitamin D levels and better fitness!