4. Stand straight then use the dumbbell which has the heaviest proportion that you can lift comfortably over the head. Grasp it at the level of your shoulder with the palm of your hand facing forward then push it overhead in a straight manner until your arm have reached its full extension before it returns from the position where you started. Do this exercise in 10 repetitions, slowly so that you will not strain your arm after which, switch the dumbbell to the other arm. Do the repetitions at least three times from either hands. You have to be sure that your body and arms can tolerate the repetitions otherwise you are prone to muscle wasting as well as injury.
5. Alternate exercises. For the last one mentioned, you can do the dumbbells and after several repetitions, go down with the push-up. This is very efficient because of the evident use in military training. Push-ups, in general, provides resistance to weight that is needed to build muscles and at the same time increasing the rate of metabolism. If you are having difficulties with push-ups, you can start with simpler ones like knee push-ups.
6. For other upper-body exercises, you can use the dumbbells so that you can target the shoulders, upper muscles of the chest, forearms and muscles of your deltoid. Dumbbells have greater chances of increasing the rate of your metabolism faster that other equipments do.
7. Lastly, consider to alter certain areas in your lifestyle that is in conjunction with the exercise that you are habitually maximizing. If you consume more fats before, then try toning it down to limited amounts. Instead, consume something that has a higher content of protein, calories and nutrients.
It is also good that you consume vegetables, whole grain and citrus fruits. This will give you more advantage for your muscle gaining technique.