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A.M. VS. P.M. Workouts: When is the best time to exercise?

While some people wake up early to get there workout in, others prefer to wait until the afternoon/evening. Is there a best time to workout? Evidence suggests that finding the perfect time to exercise is as much about personal preference as it is physiology. Sooo… discover the pros and cons of working out in the A.M vs. P.M. and decide which is the best time for you!

Morning Workouts


  • Get it out of the way so you don’t have to think about it the rest of the day!
  • Setting a tone to have a healthy day. (I know i’m more conscious of what I’m eating after I do a workout so i don’t ruin all of my hard work.)
  • Give you a good energy boost for the rest of the day.
  • Gyms are often more quiet in the morning if you prefer an emptier workout place.


  • Muscles may be tight and cold from sleeping and being stiff for several hours so make sure to stretch properly.
  • You may still be half asleep and not fully paying attention to what you’re doing which could result in an injury.
  • If you wake up to early and/or overexert yourself, it could leave you feeling tired during the afternoon slump. (This was my problem yesterday.)

Afternoon/Evening Workouts


  • Body temperature typically increases throughout the day, so muscle strength and endurance may peak in the late afternoon
  • The afternoon is also when reaction time is quickest and heart rate and blood pressure are lowest, all of which combine to improve performance and reduce the overall likelihood of injury.
  • Work away stress and get your aggression out after a busy and long day.


  • Tired and exhausted from the day resulting in reduced willpower or motivation to workout.
  • More commitments and schedule conflicts could get in the way of your designated afternoon workout time, leaving you without any workout at all.
  • Working out after 8pm may disrupt your sleeping habits, leaving you more alert and awake.

These are just some of the few Pros/Cons to working out in the A.M. vs. the P.M.

Best Time Bottom line: There is no one size fits all when it come to working out. Any time is a good time to workout! Research suggests that the body adapts to a regular exercise routine no matter the time of day. Additionally, sticking to a specific workout time can result in better performance, higher oxygen consumption, and lower perceived exhaustion. Therefore, pick and choose your best workout time by weighing your top pros and cons of each!

Article written by GUADS staff member, Chelsea with contributions from www.greatist.com

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