You must be certain that your heart can take it, and you must begin slowly and build up. I strongly recommend that you find a trainer to help get you started. Nevertheless, many body builders use it with every workout. Creatine is cheaper and more effective. It has a dramatic effect, even in the absence of exercise.
Creatine is the substance in meat which causes muscle growth.
A mere two grams daily is sufficient to do the job. It is odorless, tasteless, and mixes well with food, water or juice. Wait thirty days for the full result, or if you want quick results, use six grams per day for one week, then back off to two grams per day. After a few weeks, the shaking stops as strength returns. It is a dramatic effect.