Many stamina building exercises, such using treadmills or jogging, improves the strength and endurance for only those muscles which are involved in the activity. If you thoroughly concentrate on such type of exercises only, in that case you run the risk of developing an imbalanced physique. Imagine, having powerful leg muscles and buttock muscles but at the same time having weak shoulders, chest and arms. To prevent this imbalance, make sure that exercise routines includes resistance exercises for the upper body. Alternatively, you can use stamina building equipments such as rowing or skiing machines that exercise the upper and lower body at the same time, thus providing you a balance physique.

Most of the muscles work in pairs. To create movement in one direction, let’s say like when we pick up a glass of water, one muscle in the arm will contract while the other relaxes. On the other hand, while putting the glass down, when we provide movement in an opposite direction, the muscle actions reverse. Unless both muscles of the pair are exercised evenly, imbalances can occur that can actually reduce the efficiency of the joints and increase the risk of injury. This is one of the major cause for the posture problems, leading to the problems such as persistent neck pain and backache.

You should vary the types of exercise you do so that all the muscles of the body are improved “or conditioned” evenly without actually concentrating on any particular muscle group.

Certain muscles have important roles as fixating, or stabilizing muscles. This means that there main task is to maintain the body’s position or posture while the other muscles are involved in actual physical work, such as lifting, pulling or pushing. Varying your exercises and activities will ensure that these muscles get a proper required workout, too. Strong abdominal muscles, for example, are particularly important when lifting heavy loads. They give extra protection and support to the back and help to prevent a hernia which is a condition where the intestine protrudes through a weak area of muscle.

Always keep in mind that you should never do strength exercises when you are tired. In that case, you greatly increase the risk of injury if, because of physical or mental fatigue, you are not in total control during an exercise or you are not concentrating on doing the exercise correctly. Also remember that exercise is not to be taken lightly or jokingly. Poor exercise techniques is likely to put excessive strain on muscles, joints and connective tissues that are yet not prepared or strong enough to cope with it.