There are a lot of pieces missing from this puzzle, but just at first glance:

With that kind of cardio, your gonna end up muscle wasting. I dont care what your taking, your running like your training for a marathon, so expect to look like a marathon runner at the end ...

And yes there is nothing wrong with cardio on rest days, I'd suggest something more along the lines of alternating HIIT, and your long runs. IMO its better to look like a sprinter then a marathon runner.

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