Targeted Muscles

The main muscles involved in stabilizing your core are those in your abdominals and back. Your abdominal muscles comprise four primary muscles that work together to flex your spine, rotate your body, and pull in your abdomen: the rectus abdo-minus, external oblique, internal oblique, and transverse abdominus. The rectus abdominus works to pull your upper body toward your lower body when you sit up from a lying down position, as you would do in a crunch exercise. The obliques are responsible for bending your spine to the side, rotating your spine, and tilting your pelvis. Found in the deepest layer of the abdominal muscles, the transverse abdominus functions as a natural corset, enveloping your lower abdomen to support your spine and internal organs.

The main core muscles in the back are the multifidus and the erector spinae group. The nml-

tifidus muscles are the deepest muscles of the lower back. They connect the spinal vertebrae and are crucial in bending your back. When these muscles are underdeveloped, lower back pain can result. The erector spinae is made up of three layers of muscle that run along the entire length of both sides of your spinal column from the base of your skull to the sacrum, a large, triangular bone at the base of the spine and at the upper and back part of the pelvic cavity. The erector spinae muscles help you maintain an erect posture and keep your spine stable and mobile. The core exercises in the Biggest Loser fitness program are designed to work all of these muscles, give you greater strength and stability, and produce a tighter, more toned midsection.

Dynamic Six Pack Abs

Dynamic Six Pack Abs

Reasonable care has been taken to ensure that the information presented in this book is accurate. However, the reader should understand that the information provided does not constitute legal, medical or professional advice of any kind.

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