Power back in IndyCar at Barber Monday
Power ran 115 laps at Barber Motorsports Park in Alabama, and was scheduled to test again Tuesday.
"Physically, I felt absolutely fine, great, no soreness at all where I hurt my back," Power told AP News. "I felt bloody good."
"I was very much looking forward to getting back in the car, just getting back in the swing of things," the Australian said. "It was quite nice, and there were no problems at all. We got lots of miles in and that's basically all we're doing, just putting a lot of miles in."
Power tested the new IndyCar for Chevrolet, and Simon Pagenaud tested for Honda. Four-time series champion Dario Franchitti will test for Honda on Tuesday.
"On the road courses, the new car is quite nice," he said. "The car no question is faster and has more grip. But it still needs some work. It still needs to get working a little better."