Indian-American astronaut Sunita Williams set yet another record as she completed a triathlon in space by running, biking and swimming along with athletes during the Nautica Malibu Triathlon held in Southern California over the weekend.
"A big shout out to our astronaut strength and conditioning folks, who were really interested in this and who got this whole workout together," Williams said, thanking the NASA Exercise Lab staff and neurosurgeon Sanjay Gupta, CNN's medical correspondent who trained with Williams before her launch.
"Thanks everybody for your support. I'm happy to be done. It wasn't easy, and I'm sure everybody in California's very happy to be done too," she said from the International Space Station on Sunday after she crossed the orbital finish line.
Williams, who is the US commander of the Expedition 33 crew aboard the space station orbiting Earth about 240 miles (386 km) overhead, used exercise equipment that included a stationary bike, treadmill and strength-training machine specially formulated for weightlessness to simulate the triathlon experience in space.
After "swimming" half a mile, biking 18 miles, and running 4 miles, Williams finished with a time of one hour, 48 minutes and 33 seconds, she reported.
The space station has its own treadmill and stationary bike, which use harnesses and straps in place of gravity to keep astronauts from floating away.
To simulate the swimming portion of the race, Williams used the Advanced Resistive Exercise Device (ARED) to do weightlifting and resistance exercises that approximate swimming in micro-gravity.