Treadmill Locomotion is one of eleven International Bedrest Standard Measures conducted on healthy subjects at the :envihab facility in Cologne, Germany. The level of conditioning and effectiveness of training performed by crewmembers in long-duration flight is determined according to the parameters of the treadmill test. A distinctive feature of the Treadmill Locomotion Test is the standardization of the sequence and length of each of the five load levels with voluntary selection of work intensity within each level. The purpose of the standard measures project is to populate a repository with data that enables high-level monitoring of countermeasure effectiveness and meaningful interpretation of health and performance outcomes. These standard measures will support future, hypothesis-driven research that enables planetary missions by providing an optimized minimal set of measures captured from subjects. These measures will be available to other studies under data sharing agreements as well as undergo analysis to understand risk posture.
The treadmill test uses gradually increasing locomotor loads on the treadmill. A distinctive feature of the test is the standardization of the sequence and length of each of the five load levels with voluntary selection of work intensity within each level. The speed limits of slow, moderate, and fast running are self-selected by subjects. Parameters collected during each of the five load levels are running speed (m/s) and heart rate (bpm). The intensity of work performed is then expressed as the ratio of peak heart rate to peak running velocity (beats/60 m).
The treadmill test consists of several steps:
The test is performed with the treadmill in idling regimen (passive mode). In this mode, the treadmill belt is driven by the force of the running subject. The length of the test is 11 minutes and the energy expended during the experiment is approximately 100 kilocalories (kcal).
The scheduled days of collection are as follows:
The :envihab International Bedrest Standard Measures Test Battery is not a hypothesis-driven study, but rather a collection of data made available to future researchers and for trend analysis. As such, there are no specific hypotheses, outcome measures, or statistical analyses associated with the skeleton of the project. The questionnaire will capture a "snapshot" of optimized data that can be investigated by researchers in the future.
|Mission||Launch/Start Date||Landing/End Date||Duration|