Morning vs. Evening Workouts: New Study Shows Which is Better

Serious lifters are always looking for any advantage they can find. Beyond the beginner level, it's difficult to progress no matter if the goal is strength, muscle, or endurance.

One hypothesized advantage is the time of day you train. Some people believe that core body temperature, hormone fluctuations, and circadian rhythm, all of which change throughout the day, can have an impact on training.

A recent study put this to the test. 36 healthy adults were split into three groups: one which trained in the morning, one in the evening, and one that did not train at all, which served as the control.

The two exercise groups lifted weights 3 times per week for 6 weeks, performing 8 exercises per session. Researchers measured muscle thickness, strength, and insulin sensitivity (how well the body handles blood sugar) before and after.

What they concluded was… it doesn't matter.

Both exercising groups built muscle and got stronger, with neither showing a statistically significant advantage over the other. Both groups also improved insulin sensitivity. Blood glucose monitoring did not show a meaningful difference between the groups in terms of blood sugar patterns.

The biggest practical takeaway is that you should exercise at whatever time fits your schedule. There's no magic window that unlocks better results. Consistency beats timing.

Yes, very boring to hear, but it's the truth according to the current science. After all the speculation about timing your training, it appears that the only thing that's important is that you get in the gym.

It's worth noting that this study had some limitations. It only included young, healthy adults, so we can't say for certain these findings apply to older individuals or those with metabolic conditions like diabetes. The intervention also only lasted 6 weeks, which is relatively short in the context of long-term training adaptations. That said, these results are consistent with prior research on the topic, and the overall message is clear: stop overthinking it. Train when you can, train consistently, and train hard. That will always matter more than what the clock says.

Copyright 2026 The Arena Group, Inc. All Rights Reserved

This story was originally published May 13, 2026 at 2:51 PM.