This week in 15-minute or less fitness: abdominals

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One great way to increase your energy and productivity throughout the week is with small breaks during the workday; combining a few of those breaks with simple anywhere exercises can also jumpstart your fitness. This week's focus is on abdominals.

SparkPeople.com, an online healthy living community, and ShapeFit, a health and fitness site for weightloss, has two great videos that you can follow at home and from your cubicle (if large enough to lay out a yoga mat).

Also, try sneaking away to a park for the quick workout and load up on some vitamin D at the same time. Here are the workout videos and printable versions explained with instructional images:

15-Minute Abs Workout: Say goodbye to boring crunches
http://www.sparkpeople.com/resource/fitness_articles.asp?id=675 (video)
http://www.sparkpeople.com/resource/fitness_articles.asp?id=979 (print)

12-Minute Pilates Abs Workout: Mat exercises to whittle your middle
http://www.sparkpeople.com/resource/fitness_articles.asp?id=996 (video)
http://www.sparkpeople.com/resource/fitness_articles.asp?id=997 (print)

Quick Abs Workout Routine: Great abs in 15-minutes
http://www.shapefit.com/great-abs-workout-routine.html (print)