Bodyweight squats target the lower body, with you squatting down and standing up. Push-ups work the chest, shoulders, and triceps, performed by lowering and raising your body in a plank position. Dumbbell lunges engage the legs and glutes, stepping forward into a lunge with weights in hand. Dumbbell rows target the back and biceps, bending over and pulling weights towards your torso. Planks strengthen the core and stabilizing muscles, holding a push-up position on your forearms. Incorporating these exercises with proper form can help beginners build muscle effectively.