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The "core" is not a particularly well defined group of muscles, but it would commonly include the following muscles. Rectus abdominis: This is the "6 pack" muscle, often just referred to as "the abs". Role: Spinal flexion (bending forwards at the lower back) Isolation exercises: Most ab exercises, including sit-ups, planks, ...


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The main purpose of the abs is not to do situps but to stabilize the spine. The spine is a bit like an antenna mast. The antenna mast have guy-wires to stabilize it against external forces such as wind: The spine also have guy-wires in the form of muscles running from the base of the spine: the pelvis to the upper part of the spine: The body can adjust the ...


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In order to save your back you want to train your abs isometrically. Goblet squats train the rectus abdominis very well. Push-ups are also good. Single arm kettlebell deadlift trains the obliques very well. Zercher squats are also supposed to train the rectus abdominis + obliques very well.


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