The main purpose of weight training is to gain muscular strength.
Other purposes include building the size of muscles, adding definition and muscle tone, decreasing reaction time and improving reflexes, practicing sports skills (such as a Baseball player who takes practice swings with a heavier bat), improving or maintaining general bodily health, and relieving stress.
the purpose of the spline is to support the weight of your head
To counteract the weight of the barricades arm. This way the counter weight will do most of the work when the barricade is lifted.
The main reason is to train demigods. Training them to fight and protect them self to prepare for wars or missions.
to hold more weight and to span more distance
The main purpose of the 'Whole Dog Journal' is to help one look after their dog. It provides advice on giving puppies and dogs the correct nutrition and also training advice.
For free weight training I would look in to http://www.sparkpeople.com/resource/fitness_articles.asp?id=1033. It is a very informative article that discusses the benefits of weight training and gives you tips on weight training.
weight training strengthens your skeletal muscels
To counteract the weight of the barricades arm. This way the counter weight will do most of the work when the barricade is lifted.
Strength and possibly power (depending on the type of weight training)
Yes. Because the main purpose for you is to burn calories in order to lose weight.
To balance the weight of the barriers - so the motor that raises and lowers it doesn't need to use more power to move it.
Muscle training is lifting weights and weight exercises