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It's an interesting mechanism of regulating cellular metabolism and differentiation, but keep in mind that these are changes to the muscle cells, not the gametes. Unless you can find some correlated methylation in the egg or sperm, these findings aren't quite as meaningful as I think you'd like.
Here's a slightly more interesting and relevant article correlating epigenetics with child development and long-term diseases. I haven't read more than the abstract of it, but you may like it!