One of the discoveries that permits a society to be a true space faring civilizations instead of one that occasionally will visit the orbital space of their native planet of even beyond is the means to artificially control gravity.
A Personal Gravitation Adjuster is a small device that can be clipped on to a belt or similar device and permit a being to not only simply survive but even prosper in locations where the local natural gravity is far from that where his species evolved.
They also have been known to be used to gradually increase the muscle development of an individual.