I told you TDM technique. that means you have to use timer interrupt.
say after every 200 ms timer interrupt generated and it reads 1st flex sensor value
after another 200 ms (means 400 ms) again interrupt generated and it reads 2nd flex sensor value
like wise in every 1 sec you can read values from all 5 sensors.
meanwhile in continuous loop you just keep on rotating motors with new updated values of sensor