Version Used Onboard the International Space Station (ISS)
Researchers asked two to four crew members to collect static load and dynamic exercise data while wearing the shoes, which look like high-tech sandals. During the static load test, crewmembers were asked to set the ARED to provide specific loads in the same way they would set loads on a weightlifting machine at the gym. They then lifted the exercise bar and stood still on the ARED while the shoes collected data. This simple and repetitive test was necessary to make sure the force measuring shoe works as well in microgravity as it does on Earth.
As crewmembers performed these exercises, the ForceShoeTM, which acts like an enhanced bathroom scale that measured loads applied downward as well as during front-to-back and side-to-side movements, transmitted data via Bluetooth technology to computers on the International Space Station (ISS). Researchers on Earth received this data a couple of days later.