lesson # 5 abs exercise

Yes, you can train your lower abs!

One of the biggest controversies in ab training is the question of whether you can "isolate" your upper and lower abs. There are experts who swear you can, and experts who swear you can't. If someone wants to get technical and split hairs, then it's true - you CAN'T isolate lower and upper abs. The word "isolation" is somewhat of a misnomer because muscles work in conjunction with other muscles at all times.

For example, a bench press is often called a "compound" exercise because the pecs are heavily assisted by the triceps and deltoids, while a dumbbell flye is usually referred to as an "isolation exercise" because it "isolates" the pecs more. However, the pectorals do not and cannot work in complete isolation from the triceps and deltoids; there is simply a smaller degree of involvement from the assisting muscles in the flye exercise. Therefore, the flye is an "isolation" exercise, relatively speaking, but not literally speaking.

The same is true of the abs. You can't completely isolate the lower from the upper abs or the abs from the obliques, but you CAN put greater emphasis on the lower or upper abs depending on the exercise you select.

The abdominals are a unique muscle. They are not a single long muscle belly like the biceps, which has continuous fibers running the entire length from origin to insertion. The ab muscles have a tendinous band in between each section. This is what gives the abs their segmented, "six pack" appearance.

Each segment of the abs flexes a portion of the lumbar spine and or pelvis. The lower abs are the part responsible for the flexion of the lower lumbar vertebrae and backward rotation of the pelvis. The upper abs are responsible for the flexion of the upper part of the lumbar spine.

The practical application of this information is simple: Exercises that draw the lower body towards the upper body, such as reverse crunches, hip lifts, and leg raises, emphasize the lower abs. Exercises that draw the upper body towards the lower body, such as crunches, emphasize the upper abs (but neither completely isolates one or the other).

One last tip: Because most lower ab exercises require more coordination and stability (they're harder), do your lower abs first most of the time (especially if you're using hanging straight leg raises - doing them last is extremely difficult).

The best lower ab exercises

Support knee ups Support leg raise Hanging knee up Hanging leg raise Reverse crunch Incline reverse crunch Stability ball reverse crunch Reverse crunch with medicine ball behind knees Hip lift Bent knee leg raise/hip lift combo Incline hip lift