The athlete is positioned with the knee bent to 90 degrees with the heel resting on bathroom scales, which are placed on a firm table or box. (sportsinjuryclinic.net)
The ultra modern glass digital bathroom scales have a memory setting which retains your previous two readings. (romanathome.com)
Or would you ever want to weigh yourself with bathroom scales that weren't influenced by the weight of the person using them? (edweek.org)