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The Once-a-Week Abs Workout. Una hora por semana para construir abdominales de hierro!

Training for a half-marathon burns calories, sculpts lean muscle, and turns you into an endurance machine. Running Plans & Half Marathons

from thelivefitgirls.com

Flat Abs in 5! •

Tone up in 5 minutes with this quick and efficient ab workout! - Flat Abs in 5!

from BuzzFeed

16 Super-Helpful Charts That Teach You How To Actually Work Out

Finally learn how to use the leg press machine to target different muscles.

from 30 Day Fitness Challenges

30 Day Abs Challenge

30 Day Abs Challenge - try this workout at the beginning of the new month & stick with it! You'll see results!

from Skinny Mom

19 Core Exercises for a Tummy Makeover [VIDEO]

19 Best Core Moves - tighten your tummy and get the abs of your dreams!

The best ab exercises for toning and slimming- and to get rid of that muffin top!