(adj.) Also spelled analogue, describes a device or system that represents changing values as continuously variable physical quantities. A typical analog device is a clock in which the hands move continuously around the face. Such a clock is capable of indicating every possible time of day. In contrast, a digital clock is capable of representing only a finite number of times (every tenth of a second, for example).
If you notice your hands are shaky when pouring a cup of coffee, holding a bridge hand or combing your hair, you may leap to the conclusion you are in the early stages of Parkinson disease. But actually, essential tremor is the most common form of abnormal trembling -- primarily of the hands.
There are a couple different reasons for tremor in the hands. First, if your are fatigued, sometimes this comes out in the muscles as a tremor. It can be worsened by caffeine, such as coffee or soda. Fatigue alone as a cause of muscle shaking would be unusual just in the mornings, however, as one would think that that is when you would be at your least fatigued. A second cause would be essential tremor. This is a relatively benign neurological condition of unknown cause in which a part of the body (usually the hands) shakes, primarily when trying to perform an action as opposed to when at rest. Essential tremor is also worsened by caffeine, like a fatigue tremor. There are several medications which can be used effectively to decrease the severity of essential tremor. Other causes of tremor would be unlikely in a young man, but still need to be ruled out by your doctor.