It varies from person to person. Depends upon the stamina of the person, body type and how much a person is aiming to lose/maintain. However, health specialists recommend training each muscle group 3 times per week.
For muscular endurance exercises, it is recommended to perform 2-4 sets for each muscle group.
There are many exercises you could do for small muscle groups such as smiling. You could also do butt flexes.
When gaining mass, reps should be small 5-10 and workouts shouldn't exceed 30 mins. Perhaps five different exercises consisting of compound and isolation exercises. Also focus on one muscle group at a time (Pec-Tricep etc)
8 to 12 tmes permuscle group
There are many different calming exercises a person can do. Most popular exercises are breathing practice, muscle relaxation and mind relaxation.
Compound exercises utilise more than one muscle group. As such there is no localised strain on one particular area. The main reason a adolescent would be recommended these exercises is because highly localised stress could cause bone damage. At that age, most peoples bones would not be mature enough to handle the stress of exercises focusing on a localised area. As such, the greater the stress can be distributed amongst many muscle and joints, the less chance of short or long term injury.
8 to 12 tmes permuscle group
8 to 12 tmes permuscle group
8 to 12 tmes permuscle group
There are many exercises that are good for working your forearms. Some of these include the cable wrist curl and the farmers walk. You can find these exercises and others at the following website: http://www.bodybuilding.com/exercises/finder/lookup/filter/muscle/id/2/muscle/forearms
In order to stimulate your muscles to grow you have to cause them to do more work than they are used to. The main reason why we build muscle and get stronger is because when we increase the workload and stress on our muscles past what they are used to it forces them to grow in order to adapt to this new stress level. So in saying that it is important that if you are looking to build muscle you need a workout that is going to stress the muscles as well as hit as many muscle fibers at one time as possible. Your workouts should consist of mostly compound exercises such as: Bench Press Skull Crushers Military Press Lunges Squat Rows Clean and Press Compound exercises will hit the most muscle fibers than any other exercises which means more muscle growth. These exercises should be performed using proper form and should be kept within the 6-10 rep range. This means that if your goal is 8 reps than on your 8th rep it is extremely hard for you to push out that rep. Rest is also very important, just remember that working out too much will cause overtraining which will in the end cause you to lose muscle instead of gain it. It is recommended that you workout a particular muscle group only once every 5-7 days.
Try to life 4-5 times. I would leave at least 2 days in between workouts of the same muscle groups, but some say you only need 1 - see how you feel. Don't worry too much about your arms, they're a pretty small muscle group and are worked in many other exercises. Hit the biggest muscles and you will find that they will all begin to grow.