There are extensive programmes available to improve your ability to do pull ups.One of the easiest ways is to lay on the floor between two chairs with a bar or stout rod laying on the seats. You pull yourself up to the rod then concentrate on slowly lowering yourself on the negative part of the movement. As you improve you raise the height of the bar but still keep you heels on the floor.. This is the analog of the push up progression.
It is called WORK-ing out for a reason.
I said getting fit was simple, I did not say it was easy.
Cardio burns calories, strength work burns fat.
Eat well to lose weight, exercise to get fit
You can not build a six pack using twelve packs
Often when we seek a magic bullet for fitness we end up shooting ourselves in the foot.
"I think calories are little germs in food that all moms are afraid of" Dennis the Menace