Somatic or adult stem cells, like embryonic stem cells, are capable of self-renewal but demonstrate a restricted differentiation potential. Nonetheless, these cells are crucial to homeostatic processes and play an important role in tissue repair. By studying and manipulating this cell population, scientist may be able to develop new regenerative therapies for injuries and diseases. This video first defines somatic stem cells, and then explores the role these cells play in tissue regeneration. This is emphasized in a description of a protocol that isolates muscle satellite cells and uses them to repair muscle damage in a mouse model of muscular dystrophy. Finally, we discuss specific tissue regeneration studies utilizing somatic stem cells.