I have just started lifting weights after 2 years of inactivity. I've been lifting for about 2 months. I own one 2, 5, 10, 15 lb weights. I also own adjustable weights but I don't like to constantly have to alter the weights. I start with a warmup by moving my arms to mimic how the weights are lifted. I then do a set of 12 with the 2, 5,10 weights. I then did 2 sets of 8 with the 15 lb. weight. I then lift the 15 lb weight till I can't lift anymore in proper form. I perform a series of 4 exercises. (not sure of the names)
My questions are. Is this enough of a warmup? How intense should I push since I'm 52 years old 5' 5" 176 lbs. I read seniors should only lift moderately. I enjoy lifting and like to push the last reps.

I do a 10-15 minute warm-up on either an elliptical or a stationary bike. Last resort I'll use a treadmill, but it bothers my knees. Please note this is for warm-up to lifting, not necessarily at a high cardio rate. I do cardio work after weights, or on other days. Keep up the good work and don't be afraid to move to higher weights, and more exercises.
) to keep your muscles from being attuned to what you're doing and working less hard. (I'm not saying this well, but basically your body gets very efficient at a routine and it doesn't burn as many calories or make as much progress).
The are a fantastic full body exercise which primarily targets the chest.
