Sorry for being repetitive, since I already mentioned this in other threads, but head shrinking is a very common practice, rampaging in publications and studio pics: it makes the model look much taller, and by comparison, her whole body (and muscles) look bigger. Many female muscle athletes are short, and appear like amazons.
Regarding your issue with blurring, M7, not only I agree, but I'll quote another member: "Some methods of muscle building and HD pictures don't get along".