calculate physical fitness index for 12 year old boy having completed Harvard step test for a duration of 3 minute and Pulse rate of 54 beats for 121.5 minutes 50 bits for 22.5 minutes and 46 beats for 32 3.5 minutes Share with your friends Share 3 Sanchit Dora answered this Dear Student, Thus, here we get PFI to be 60. Regards. 3 View Full Answer