He keeps back, entirely out of Tony's space, but half extends a hand again as the other man climbs to his feet. He's just not willing to take a chance and assume things are okay now until Tony is upright and not immediately collapsing again. Only then does Steve lower his arm.

"Okay." A little pressure eases in his own chest. They may not get along right now, but he doesn't like seeing anyone have to struggle. Least of all team members. "I gotta get going. Take it easy."