It takes planning and organization to squeeze a full extra hour of exercise into your morning. You'll be waking up earlier, so you'll probably need to change your bedtime. And this is January, one of the coldest, harshest months of the year. Totally doable if you've already been getting up early, but a jarring switch if this is new to you. After just a week of oversnoozing, you may feel so defeated, says Bob, that you won't bother to give it another try until May.
While Bob prefers morning workouts because they tend to be the easiest to stick to (besides sleep, there's not much else competing for your time), he recognizes that exercise in the a.m. doesn't work for everyone. Find the time of day that works best for you
and commit to a regular schedule for one solid month.