Each month iVillage poses a different question to our Dream Team of experts. Here's what we asked this month: Does time of day matter regarding workouts? Some people swear by morning workouts, while others contend it doesn't matter.

Jonny Bowden, MA, CN, CNS
It absolutely doesn't matter. The best time of day to work out is the time when you're most likely to do it. Period. That said, there are reasons that many people suggest morning workouts, but it doesn't have to do with physiology. It has to do with habit and consistency and mental attitude. When you start the day by doing something really good for yourself, it sets the tone for the day and has a positive effect. It's the "eat the frog" concept ‑- get the big things out of the way first, and everything else is smooth sailing. That said, if it works for you to do it at three in the morning, that's fine too!

Stacy Berman, Trainer
Technically ‑- if you can work out with the same intensity in the evening after a long day of work as you can in the morning ‑- it doesn't matter. Often though, you're just thinking of going home after work. You drag yourself to the gym anyway and do a half-assed workout while thinking about what you will be having for dinner or what shows will be on TV that night. In that case, you're not getting the most effective and efficient workout. Also, doing a workout in the morning will leave you feeling energized for the rest of the day, and you get it out of the way.