For lower abs the most effective strength training exercise is the winding back. Generally to the top of the abdominal muscles must lift the bust, to beef up the bottom are the legs to be raised. In fact the lower abdominal do not exist as a separate muscle. When we speak of abdominal bottom means the lower part of the rectus. Exercises asking this muscle so also seek their bottom.

How to explain the performance differences for the number of repetitions in-abdominal crunches?
To crunch the report bust size-abdominal strength is an important element and the distribution of muscle mass and therefore body weight; an individual less massive at the shoulders and chest can make faster movements and more reps. There is also the muscle endurance which can also be higher but then only the amount and quality of prior training are taken into account.

What is the best exercise to build muscle transverse abdominals?
For transverse abdominals must do the exercise above flat back of bringing the chin towards the chest without taking off the ground head to stretch the neck. As a personal witness, I can give you a very simple trick to apply: this is transverse to contract with each exhalation in current Running wrapped and blowing while slightly returning the belly below the navel, slightly as when one tightens its belt. It has a very efficient and toning permanent almost unconscious of deep abdominal!

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