One’s strength, therefore confidence and sense of adequacy, sense of being outwardly forceful; masculinity in its physical side. Also may refer to physical muscle. ... A Guide to Dreams and Sleep Experiences
Muscles are a predominantly male image that is symbolically connected to strength, power, and sexual masculinity. Muscles are often hyper- exaggerated and in this way are representative of what can happen when there is too much emphasis put on these qualities.
If you have obvious musculature in the dream, you are seeing the evidence of a great deal of effort being put in the doing of some aspect of your life.
If someone in the dream is very muscular, use the character-aspect technique and assign that part of your personality an extra dose of strength and power.... Complete Dictionary of Dreams