The Mike Marvel DYNAFLEX Course!

Straight from the back of nearly every single comic book ever printed from the early 50's to the mid 70's comes the World Famous Mike Marvel DYNAFLEX Course! No telling how many youngsters saved up their paper route money to send away for this one but it was undoubtedly quite a few. The course itself has an interesting "take" on working out and if nothing more, was an important stepping stone for a lot of folks into other aspects of physical training.
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Author: John Wood

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