The structures at the bottom of this image that look like scales are actually bundles of muscles just under the skin of a rabbit. This image is a stained cross section taken under polarized light ...

Start on an all fours, with your hands underneith ... but strengthens the spinal erectors (the deep muscles of the back that run the length of the spine on either side). These support the back ...

it also includes deep muscles in your pelvis, hips and back; smaller stabilizing muscles along your spine; and your diaphragm. It’s in the core that force is transferred from the legs to the ...