Your body is devolving, evolving, becoming a Darwinian delight. Puny useless space legs shrivel. Sinewy spine unwinds. Biology does not lie. You are transforming.
Resistance is futile.
Embrace your transcendence. Shed your Earth-based assumptions and perceptions. You are an interplanetary citizen of the solar system. Become a Martian. Before you land, tone that willowy space bod for six months of hard labor.