(1:13) what exercise should look like in your 20's, (2:40) why regular exercise is needed in your 30's, (4:11) lifestyle changes in your 40's, (6:14) 50's and why exercise becomes essential, (7:48) your 60's and the need for resistance training, (9:58) 70's and maintaining your functional independence, (11:16) 80's and respecting your age.