Exercising can be difficult. When you make the choice to start working out, you have to sacrifice something from your daily routine.
If you exercise at night, that’s less time you get to relax and unwind after a long day of work. That may be why some people decide to wake up earlier in the morning to knock their exercise out. However, waking up early can cause a lack of sleep, and that can cause hormonal disruptions. When you try to stay awake during the day with insufficient sleep, your appetite is typically larger and you’re likely to crave unhealthy food. Both of which are counterproductive for someone making a pledge to exercise more.