A Case for the Afternoon Workout

One studyTrusted Source found that your body’s ability to perform peaks in the afternoon. Your body temperature increases throughout the day, optimizing your muscle function and strength, enzyme activity, and endurance for performance.

Between 2 p.m. and 6 p.m., your body temperature is at its highest. This may mean you’ll be exercising during the window of time your body is most ready, potentially making it the most effective time of day to work out.

Additionally, oxygen uptake kinetics are faster in the evening, which means you use your resources more slowly and effectively than in the morning. Working out in the morning could also require adding an additional warm up to your routine, which could take away from the focus of your workout.

The case for working out in the afternoon and evening continues. In the afternoon and evening, your reaction time is at its quickest, which is important for exercises like high-intensity interval training (HIIT), or speed work on the treadmill. The late afternoon is also the time when your heart rate and blood pressure are lowest, which decreases your chance of injury while improving performance.

While some may caution individuals about how working out at night can disrupt your sleep, one study even found that those who lifted weights in the evening got better quality sleep and slept for longer than those who did the same workout in the morning.

 https://www.healthline.com/health/fitness-exercise/best-time-to-workout#The-Case-for-Sweating-in-the-Afternoon,-or-Night