You’re Not Alone. Morning Workouts Really Are Harder

You Should Know: The morning-versus-evening workout debate has been around for decades, but science still hasn’t crowned a universal winner. We do know that morning and nighttime workouts come with some mutually exclusive pros and cons. (For instance, working out at night can make it hard to fall asleep due to elevated core temperature and certain hormone surges; on the flip side, evidence shows we are stronger later in the day.)

Going Deeper: Research links athletic performance to circadian rhythm, the internal clock that regulates hormones and other physiological functions. Several studies suggest most people hit their athletic peak between 4 p.m. and 7 p.m., thanks to higher body temperature, favorable insulin levels, and a more responsive nervous system.

Takeaway: If your priority is optimizing strength, speed, or power, late-day training might give you an edge. But if you tend to “save” your workout for the afternoon and never get to it, morning exercise is your best bet. And consistency wins every time.

Bottom Line: Faced with different sets of benefits and drawbacks, it’s really up to each person to decide whether morning versus night workouts are better. What’s optimal for one person is not always optimal for the next.