Mechanisms of Action and Influence, and Effectiveness of Various Methods of Phrophylaxis Directed Toward Prevention of Disturbances of the Human Locomotion System in Weightlessness (Profilaktika-1 (Prophylaxis-1)) - 02.25.15

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ISS Science for Everyone

Science Objectives for Everyone
Profilaktika uses physical activity to counteract the effects of microgravity on the human body. During physical activity such as riding the stationary bike or running on the treadmill: gas levels are measured via a breathing mask and heart rate is evaluated.
Science Results for Everyone
In space you should run and walk. Physical activity counteracts many of microgravity’s effects on the human body, but researchers learned some activities work better than others. Astronauts on the space station showed significant decline in conditioning early in flight followed by recovery to preflight or near-preflight levels. The investigation also compared various modes of physical training and found interval training – alternating intensive walking and quick running—to be much more effective at maintaining muscle than training at moderate capacity. Running and walking were also found to be more effective than cycling because those activities place more load on the body.  

The following content was provided by Inessa B. Kozlovskaya, M.D., Ph.D., D.Sc., and is maintained in a database by the ISS Program Science Office.
Experiment Details


Principal Investigator(s)

  • Inessa B. Kozlovskaya, M.D., Ph.D., D.Sc., Institute of Biomedical Problems, Moscow, Russia

  • Co-Investigator(s)/Collaborator(s)
    Information Pending

    Information Pending

    Sponsoring Space Agency
    Russian Federal Space Agency (Roscosmos)

    Sponsoring Organization
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    Research Benefits
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    ISS Expedition Duration
    December 2001 - October 2008

    Expeditions Assigned

    Previous ISS Missions
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    Experiment Description

    Research Overview
    Information Pending

    Obtaining new data on the mechanisms and efficiency of various modes of physical prevention of adverse micro-gravity effects on human organism - reduction of orthostatic stability (human body tolerance to moving from horizontal to vertical position), reduction of aerobic (respiratory) capabilities, reduction in strength and endurance of skeletal muscles, skeletal muscle atrophy, bone demineralization.

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    Space Applications
    Information Pending

    Earth Applications
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    Operational Requirements
    Accusport device, TEEM-100M gas-analyzer, TEEM-100M Profilaktika kits, Reflotron-4 system to conduct blood tests analysis, TVIS treadmill, VB-3 stationary bicycle, Force loader NS-1.

    Operational Protocols
    Comparative assessment of the effects of bicycle, locomotor exercises on: Cosmonaut physical capacity for work in space flight environment; Energy support of muscle activity; Structural and functional indices of the muscular system in space flight conditions; Functional indices of the cardio-respiratory system in space flight conditions; Human metabolism in space flight conditions. Preparation of inputs for further improvement of standard systems of physical prophylaxis.

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    Results/More Information

    Comparing the efficiencies of different modes of physical prophylaxis in zero-gravity conditions applied to the same crew members conducting tests based on the use of advanced measurement technologies for further improvement of the physical prophylaxis system with the aim of its using aboard the space station. In the course of the tests a gas analysis, blood count, measurement of external respiration and arterial pressure parameters, recording of electrocardiogram and heart rate were performed.

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    Results Publications

      Popov DV, Khusnutdinova DR, Shenkman BS, Vinogradova OL, Kozlovskaya IB.  Dynamics of Physical Performance During Long-Duration SPace Flight (First Results of "Countermeasure" Experiment). Journal of Gravitational Physiology. 2004 Jul; 11(2): 231-232. PMID: 16240524.

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    Ground Based Results Publications

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    ISS Patents

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    Related Publications

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    Related Websites
    Energia - Science Research on the ISS Russian Segment

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