The suit is a poor hiking partner. Snow yields beneath each boot, while a pressurized garment fights every bend of the knee, hip, and ankle; what preserves breathing pressure and body heat can turn an ordinary uphill stride into a repeated contest against stiffness, weight, and slipping ground.
The real penalty is mechanical. A pressure garment works like a wearable resistance-band array, but the scientific name for its burden is joint torque: bending an arm or leg changes the garment's volume and stretches layered fabric against internal gas pressure. That resistance forces muscles to produce more force during flexion and extension. Add life-support hardware, boots with limited ankle motion, and a shifted center of mass, and gait biomechanics become inefficient. Short steps help. They also multiply the number of costly movements needed to cross a slope.
Cold makes the bargain worse. Snow can improve traction in some conditions, yet loose or crusted surfaces demand constant balance corrections, raising metabolic cost as legs stabilize the body instead of simply driving it forward. Thermal regulation adds another load, because a working astronaut generates heat inside insulation designed to prevent heat loss. Future suits could sense gait phase, reduce resistance at moving joints, and use active assistance to return energy during each stride. The machine that keeps a human alive may also need to learn how to walk.
