Key takeaways
  • Some studies suggest morning workouts can boost metabolism and enhance fat burning, but evidence is not conclusive.
  • Evening workouts may lead to better physical performance, though individual differences are significant.
  • The best workout time is personal and depends on individual goals and lifestyle.

Choosing the Best Workout Time: Morning or Evening?

You're pumped to improve your fitness, but there's a nagging question: should you work out in the morning or evening to boost your metabolism? Let's break it down.

What is a Morning Workout?

A morning workout is exercising between 5 AM and 10 AM. Early-bird exercisers claim this timing jump-starts their day and enhances focus. A 2019 study published in the Journal of Physiology found that exercising in the morning could shift your body clock earlier, making you more alert and ready for the day.

What is an Evening Workout?

Evening workouts take place between 5 PM and 10 PM. People who aren’t morning enthusiasts often prefer this time, claiming they perform better and feel stronger. Research published in the journal Chronobiology International in 2020 suggested that physical performance may peak in the late afternoon or evening when body temperature and energy levels are highest.

Morning vs Evening: Side-by-Side Comparison

  • Metabolism Boost: Some studies, such as one in the International Journal of Obesity (2020), suggest morning workouts might increase fat oxidation, but this is influenced by other factors like diet and overall activity.
  • Consistency: Morning workouts often lead to more consistent habits. According to a survey by the American Council on Exercise, those who exercise in the morning tend to stick with their routine longer.
  • Performance: Late-day exercisers might benefit from a day’s worth of meals fueling their workouts, leading to potentially better performance as reported by the European Journal of Applied Physiology.
  • Sleep: Evening workouts might interfere with sleep for some people, but others find it helps them unwind. The impact of exercise on sleep varies widely among individuals, and sleep specialists at the Cleveland Clinic suggest allowing at least an hour between exercising and hitting the sack.

The Verdict: When Morning Wins and When Evening Excels

When Morning Wins: If your goal is to boost metabolism, especially if you're looking to burn more fat, a morning workout may provide slight advantages. Also, if habit formation is your main goal, mornings might be your ally.

When Evening Wins: If you perform better and feel more energized with the day’s nutrients fueling you, the evening could be ideal. Performance-focused individuals might gain more benefit here.

✏️ Editor's take · John

I personally lean towards evening workouts because I feel stronger later in the day. But then again, if consistency is key for you, mornings might just be the ticket.