Most people schedule workout sessions wherever they have time for them—be it first thing in the morning before heading to work, or later in the day after taking care of everything else they need to do. The time of day you choose to do your most intense exercise might not seem important, but it can actually have a big impact on your workout results, according to Daniel Pink - author of 'When: The Scientific Secrets of Perfect Timing.'
For instance, if you're trying to reach your peak athletic performance while minimizing risk of injury you should try exercising in the late afternoon.
"Body temperature is low when we first wake up, rises steadily throughout the day, and peaks in the late afternoon and early evening," Pink told Outside. "This means that during later-in-the-day workouts, our muscles are warmer and injuries are less common."
Higher body temperatures are also related to increased metabolism, which helps explain why your muscles are strongest at this time of day.
But if your goal is weight loss, then you should be working out first thing in the morning, which Pink says will help you shed a few pounds. Exercising before you've had your first meal can burn 20 percent more fat than working out after you've eaten.
That said, Pink also warns you should be more careful when exercising early in the day. The lack of food derived energy means you'll be weaker and at increased risk of injury.
So, if you're the kind of person who is always running late in the morning, you don't have to feel bad about putting off your workout until you get home from work.