Body Augmentation

Ancient Era
(masks, tharsian zombie drug, etc.)

Modern Era
Because of the low gravity of Mars, humans born on the planet face some difficulties developing as they mature. When it can be afforded, this may be counteracted with physical therapy and pharmaceuticals, but only while they are growing up. If no such action is taken from the early stages of development, problems arise.

Genetic modification exists, but is prohibitively expensive, and thus reserved for the rich elite and people in power. Although practically unheard of because of social stratification, a lower class person that grew up without the right therapy and medicine can (theoretically) have various degrees of success fixing up his or her body later on in life.

A more accessible alternative to genetic modification is the use of bionic prosthetics. These are cheaper to produce and install, as they have a longer history of use on Earth. These include nervous system enhancements, limb and organ augmentations, and exoskeletons.