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Completed TRL 6 (started at 4, targeting 6)
The 4 main objectives in this FY'17 effort include: 1) improve the MLS bar electronics by installing full inertial measurement unit (IMU) systems, load cells, and improved Bluetooth technology; 2) ruggedize the MLS and fabricate a telescoping bar design; 3) add sensorimotor assessment and countermeasures capabilities using the WalkasinsTM system; 4) develop a novel data processing platform to integrate sensor, load, and positional data to assess sensorimotor function and provide a surrogate measure of ground reaction force. Industry and academic efforts in the sensorimotor area are typically conducted in large laboratories and include ambulation tasks and balance challenges. Testing and training sensorimotor function during exploration missions, without treadmill availability for ambulation, and within limited volume provides a very unique set of challenges that is not currently being explored by other efforts. Development and testing results of this device will be shared with the HRP's Advanced Exercise Concept team and ISS Exercise Engineering teams, as it is directly related and informative for next generation exercise devices. This hardware development and integrated analysis of pressure sensor, IMU, and load data has tremendous potential beyond spaceflight as a tool for individuals inflicted with neuromuscular diseases and stroke patients.
Decrements in musculoskeletal health and sensorimotor function occur rapidly and cause severe performance decrements during and after spaceflight that will impact crews' ability to carry out mission critical tasks. There is not currently a single hardware device available to assess changes in or prevent losses in these physiological systems. The highlights of the Musculoskeletal Loading System (MLS) and updates based on testing conducted in 2016 include ruggedization, an updated and expanded suite of sensors in a telescoping bar, the addition of a sensorimotor assessment and countermeasure system, and pressure sensor data that will be integrated in a novel data processing platform to provide sensorimotor and muscle strength assessment capabilities throughout exploration class missions.
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