Three Indian race walkers, Khushbir Kaur, Manish Rawat and Sandeep Kumar have qualified for 2016 Rio Olympics.In the IAAF Race Walking Challenge at Rio Maiorin Portugal, National women's 20km walk record holder Khushbir Kaur clocked 1 hour 33 minute and 58 seconds to better Rio Oympic qualification time by 1 hour and 35 minutes.In the men's 20km race walk, Manish Rawat and Sandeep Kumar qualified for Rio Games. Manish logged his personal best performance with a timing of 1 hour 22 minutes and 50 seconds and Sandeep clocked 1 hour 23 minute and 32 seconds, both of them well above qualification time of 1 hour and 24 minutes.