I just ordered some fancy-schmancy bathroom scales that measure bone density, weight, fat content and hydration - allegedly. They will be here end of the week-ish.
I'm about to sign up for a very, very tough off-road marathon - so I plan to map physical changes here, according to what the scales say. Could be fun, could be heartbreakingly awful. Soon find out.
I'll be doing 4-5 runs a week with perhaps four swimming sessions and occasional gym workouts (which will be mostly core focused, or occasionally hamstring), all being well, for the next 15 weeks.
Like I said, it could be fun.