More pressure and the space suit is a big balloon and you can't bend your arms. Less pressure and insufficient oxygen moves from the lungs into the blood stream. Even so, after some strenuous work, astronauts can start to feel hypoxic and need to stop for a short rest. Astronauts then breathe pure oxygen for an hour prior to going in the airlock and further depressurizing. Since space walks can last over 8 hours, provisions are made for food and water in the space suit.
Water is fed through a straw.
Carl said he had finished his fruit thing by the time he got out of the airlock. It was a long 8 hours after that. This is about 1 percent of the total energy. After a 20 minute plasma show, the Orbiter is flying aerodynamically again. The flight control surfaces are blended with the reaction controls, with the reaction controls still operating until the Orbiter is subsonic.