remove-circle Internet Archive's in-browser bookreader "theater" requires JavaScript to be enabled. It appears your browser does not have it turned on. Please see ...
Everyday Health on MSN
How Long Does It Take the Human Body to Adapt to a New Exercise?
Exercise changes your body in complex ways. Discover what happens to your muscles, heart, and mind when you start working out consistently over time.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback