Add these exercises to your training routine to improve your core strength and physique. Strong core muscles offer several advantages including improved posture, reduced risk of injury, better balance and stability, enhanced athletic performance, easier breathing and digestion, reduced back pain, and increased energy and endurance. The main muscles of the abs include the rectus abdominis, transverse abdominis, external obliques, and internal obliques. Hypertrophy is a process of muscle growth and increase in size due to resistance training. Protein is important for muscle growth as it provides the necessary building blocks for muscle repair and growth. Sleep is vital for muscle growth as it is during sleep that the body repairs and regenerates damaged muscle tissue. Getting enough sleep is crucial for muscle recovery.