^^^I recall that shot. I think it was footage of Steve running which Oscar and Rudy watched during the pilot but blown up into a close-up with, iirc, shots of trees blurring past him layered into the shot. But I recall it in slow motion. Haven't seen it since it was on the Sci-Fi Channel in the 90s.
This one? DVD Review: The Six Million Dollar Man: The Complete Collection - Slant Magazine
That slo-mo close-up that caps off the opening credits is not the one they're talking about. But an interesting thing about that one is that it plays in reverse, so it will end with the sunlight lens flare that it freezes on. He's actually "running backward" there.