These enhancements make the use of advanced armor plating to bones and cartilage, but can also be achieved through bioengineered enhancements to augment the structure, density, and durability of bones and muscles through biological means.
Bones
Bones are made denser, heavier, and thus much more durable. Sometimes the structure is altered to allow some amount of flexibility to resist against breakage.
Cartilage
The ability to retain shape against high amounts of torque is achieved through altering the natural composition of the cartilage and its connection to bones. This causes the tissues to more tightly bind to the bone and resist tearing under high physical stress.
Muscles
Muscle fibers can also be altered, either by adding nano-fibers to the structure or through other alterations to the cell walls and connective tissues. These changes increase density and can impact the speed of muscle reactions. Due to these considerations, muscles are often not enhanced in this way, leaving the bones and cartilage enhanced along with connective tissues.