Hello guys, I'm 29 and slightly obese, never work out before in my life, and my cardio pretty bad (i can run fast, but not for long). One day i read a quote of Socrates "It is a shame for a man to grow old without seeing the beauty and strength of which his body is capable" and it make me want to work out. So i'm learning calisthenics and starting with push up and pull up, although the reps is kinda all over the place, one day it can do 3 rep 5 push up easily, another day i barely can do 2 push up. Is it because i'm older so it is harder?