Talk to a coach
to make sure u know how to do the exercises properly and safely.... and not look like a dumba**
Starting Strength is a training program which includes such exercises as squats and bench presses. Further information can be found on the programs available through the Starting Strength Wikia website.
So you can see the improvement and how much you have progressed over the period of your training.
Strength training
The internet offers a variety of suggestions for personal strength training programs. If you are a man looking for information on how to burn fat and build muscle through strength training visit men.webmd.com/guide/strength-training-program-men to get started.
Assuming that you are eating properly and using a good strength training program, strength training will increase your muscle mass. Just look at champion bodybuilders, especially champion natural bodybuilders: they all became more muscular by doing strength training.
When starting a training program it is important to consider four factors. Time, frequency, preferences, and goals should be considered to make sure it will be beneficial and sustainable.
Skeletal muscle
neural adaptations
Craig E. Olsen has written: 'The effects of a set circuit weight training program on strength and muscular endurance of college age men' -- subject(s): Circuit training, Weight training, Muscle strength
Visiting a local fitness centre and speaking with a personal trainer will help with a proper and safe plan for strength training. They will be able to help with a program geared towards the muscles you wish to work on.
It is debatable about whether Fitness 19 has a better weight training program than a YMCA. Any weight training program can be beneficial but it depends on what the person is trying to achieve. Fat loss, muscle gain, toning, speed or strength. Weight training programs should be tailored to the goals of the individual in the program.
A 13 year old should start with weight that is comfortable for them for a couple of reasons. One, I assume that the individual is starting a weight training program for the first time. When someone first starts strength training program their first initial gains are not cause by increase muscle strength but from neuromuscular coordination. So the 13 year old should start their program with weights that are not out of their comfort zone. So somewhere between 70% of there max weight of main compound lifts.