Last year I joined a gym and signed up to work with a personal trainer.
I had to switch trainers because of various issues, and it ended up that Trainer #3 was the right trainer for me.
During my first session a little over a year ago, I attempted to exercise on a pull-up machine (you grab the bar at the top of the contraption and step on a li'l platform which moves up and down based on a pulley system of weights - the more weight/resistance, the easier the exercise).
At first try, I could barely do eight pull-ups at the 210 lbs. resistance weight.
Today, I easily did three reps of ten pull-ups at 120 lbs..
(I also did pushups today - many, fast, and easy, and it was enjoyable and it's because I don't have as much weight around my midsection which we'll discuss later but believe me when I tell you it was one of the AWESOMEST feelings I had felt about myself in a long while and made me glad to be me and glad to have made the decisions I've made.)
Thanks, John. Best trainer ever.