If you have a set of dumbbells the Push, Pull, Legs workout is the perfect means to build up strength and muscle. It's designed to trigger the adaptations the body needs to increase both muscle and strength and it recruits not just active muscles but also tendons and supporting muscle groups to give you a dynamic range of movement, under external, applied pressure. Combines with Push Pull Legs for upper body and Push Pull Legs for upper body and back.
Extra Credit: Use 5kg+ (10lb+) dumbbells minimum.