arm-wrestling

With electrodes attached to their arm muscles, Alta High School Juniors Nick Aluarez, right, and Justin Jeffries, ‘Virtual Arm Wrestle’ at the University of Utah Saturday, February 14, 2009. Using a technique called Electromyography, the electrodes were evaluating and recording the activation signal of muscles. An electromyograph detects the electrical potential generated by muscle cells when these cells contract, and also when the cells are at rest.
Meet An Inventor Dad had demonstrations of inventions, geared for teens and community college students to encourage them to enroll in university engineering courses.

Chris Detrick/The Salt Lake Tribune