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40 Muscle-Building Innovations

From Sit Down Workouts to Gym in a Box:

With the warm weather pretty much here, it's time to crawl out of our dank winter caves and start getting fit again. Since it's been about five months since any of us have exercised at all, I thought I would bring you these 40 muscle-building innovations as inspiration.

Whether you you want to build some serious mass or just stay lean and mean, there's something for everyone here with these muscle-building innovations.
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