YES... and NO. Confused? Well let me explain.
In my view, regardless of what research says about how your body performs in the daylight hours as opposed to the dark, the best time for you to workout is any time you can make it to the gym! Life gets busy & finding time for a workout can sometimes be hard, even though you know it's in your best interest to make time because exercise enriches your life in so many ways.
However, if you want to get technical, there is research that suggests that exercising at the same time each day can have added benefits, as your body anticipates the workout & knows to adapt, which could in turn generate more muscle.
Now don't worry Ladies, we're not talking Arnie type muscle generation, we're talking 'wow, your arms look great! Have you been working out?' type muscle generation. And we want this...why? Because as you know, the more muscle you have, the more energy you burn - even when you are sleeping or indulging in a Netflix binge, which means managing your weight becomes less of a struggle. More muscle = GOOD.
So in a nutshell the best time to exercise is:
1. When you can find time for a workout.
2. A regular time that you can stick to so your body anticipates & prepares.
With consistency you can tailor your circadian rhythms (sleep/wake cycle) to your workout schedule so your body is primed & ready to go when you hit the gym. Yeah! You Got This!