Well this is an interesting question! As trainers, we often get asked when the best time to exercise is. There are many answers to this question. Let’s look at some we’ve found..

“Early morning workout (on an empty stomach) is better for fat loss than an evening workout?”

“Generally, when your body temperature is high (peak afternoon), your workout will be most effective and you’ll burn more calories.”

“When you exercise first thing in the morning on an empty stomach, it is likely that the majority of the calories you expend will be from your fat stores, since the circulating blood glucose levels are low after your over night fast. Hence your body has no option but to utilize the fat stores for energy”

“For many people, the best time to exercise is the time that is most convenient and the time that fits into a busy schedule.”

“Research shows that the optimal time to exercise is when our body temperature is at its highest, which, for most people is 4 p.m. to 5 p.m. (body temperature is at its lowest just before waking).”

“Cardio is best done first thing in the morning (before food) and weights is best done in the afternoon or evening.”

The simple answer to this question is that there is no simple answer. All the above comments are correct, so really it come down to the individual and when you feel that you exercise the best and have the most energy. The key to any weight loss program is consistency. So whether you exercise in the morning, middle of the day or evening just make sure you do it at least 3 to 4 times per week to get results!

References:

http://sportsmedicine.about.com/od/anatomyandphysiology/a/WhenToExercise.htm

http://www.sixpacknow.com/fatlosstips.html