design and construction of a microgravity simulation treadmill for exercise in varying gravity conditions

Introduction and objective: microgravity simulators, which provide both static and dynamic environments closely resembling real weightlessness, are of significant interest to space medicine, sports medicine, rehabilitation specialists, occupational therapists, and sports science experts. the primary aim of this study was to introduce a designed microgravity simulation treadmill for training in variable gravity conditions.methodology: to build this device, the following components were used: a horizontal restraining surface that supports the user in a horizontal position, a supporting chassis that holds both the vertical treadmill belt and the horizontal supporter, six elastic straps for lower limb restraints (thigh and leg), a protractor that indicates the angle of the user's horizontal position relative to the ground and the exact amount of weight reduction due to applied gravity, and a rotating vertical treadmill belt, which is vertically oriented in this device, unlike traditional treadmills.results: after designing the device, it was compared with similar devices based on the relevant physical laws, and its reliability and validity were assessed.conclusion: the results of this research, considering the specific feature of the microgravity simulation treadmill designed for training in variable gravity conditions, which allows for the creation of environments with varying weights, recommend its use for walking and running on a treadmill in weightless and microgravity environments. additionally, this device can be utilized for research in the fields of rehabilitation, space medicine, and paramedicine.