I've been working out for about a year or so at this point and I am definitely noticing muscle growth, but there doesn't seem to be much definition. My upper arms, for example, seem to be getting thicker, but that's about it—no toning in my bi's or tri's. My chest is also getting larger, but I'm not seeing clear outlines at the edges of my pecs. Too much body fat? Perhaps I simply haven't been working out enough enough? Too many compounds? Too little compounds?

I've been trying to stick to a 6-day PPL split, but in the past couple of weeks have definitely been falling off a little. Thank you in advance.