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There are a total of 18 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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Reliability of Strength Testing using the Advanced Resistive Exercise Device and Free Weights
Author(s): English, Kirk L.; Loehr, James A.; Laughlin, Mitzi A.; Lee, Stuart M. C.; Hagan, R. Donald
Abstract: The Advanced Resistive Exercise Device (ARED) was developed for use on the International Space Station as a countermeasure against muscle atrophy and decreased strength. This investigation examined the reliability of ...
NASA Center: Johnson Space Center
Publication Year: 2008
Added to NTRS: 2009-02-09
Document ID: 20090005240
Validation of a New NIRS Method for Measuring Muscle Oxygenation During Rhythmic Handgrip Exercise
Author(s): Hagan, R. Donald; Soller, Babs R.; Soyemi, Olusola; Landry, Michelle; Shear, Michael; Wu, Jacqueline
Abstract: Near infrared spectroscopy (NIRS) is commonly used to measure muscle oxygenation during exercise and recovery. Current NIRS algorithms do not account for variation in water content and optical pathlength during exercise. The ...
NASA Center: Johnson Space Center
Publication Year: 2006
Added to NTRS: 2008-08-11
Document ID: 20080029986
Physiologic Responses and Biomechanical Aspects of Motorized and Nonmotorized Treadmill Exercise: A Ground-Based Evaluation of Treadmills for Use on the International Space Station
Author(s): Stuart, M. C.; DeWitt, John K.; Laughlin, Mitzi S.; Norcross, Jason; Smith, Cassie; Hagan, R. Donald
Abstract: Space flight-induced deconditioning includes the loss of aerobic exercise capacity, orthostatic tolerance, muscle strength and endurance, and bone mineral density. These reductions may compromise crew members ability to ...
NASA Center: Johnson Space Center
Publication Year: 2008
Added to NTRS: 2008-04-07
Document ID: 20080013523; Report Number: NASA/TP-2008-213734, S-992
Effects of Different Lifting Cadences on Ground Reaction Forces during the Squat Exercise
Author(s): Bentley, Jason R.; Amonette, William E.; Hagan, R. Donald
Abstract: The purpose of this investigation was to determine the effect of different cadences on the ground reaction force (GRF(sub R)) during the squat exercise. It is known that squats performed with greater acceleration will ...
NASA Center: Johnson Space Center
Publication Year: 2008
Added to NTRS: 2008-04-01
Document ID: 20080013257
Kinematic and Electromyographic Evaluation of Locomotion on the Enhanced Zero-Gravity Locomotion Simulator: A Comparison of External Loading Mechanisms
Author(s): DeWitt, John K.; Perusek, Gail P.; Bentley, Jason; Edwards, W. Brent; Lewandowski, Beth E.; Samorezov, Sergey; Savina, Mark C.; Hagan, R. Donald
Abstract: Purpose: Determine how External Load (EL) type affects locomotion patterns and muscular activity on the enhanced Zero-gravity Locomotion Simulator (eZLS) when using bungees or a linear motor subject loading device. Eight ...
NASA Center: Glenn Research Center, Johnson Space Center
Publication Year: 2008
Added to NTRS: 2008-04-01
Document ID: 20080012547; Report Number: NASA/TP-2007-214764, S-1014
Comparison of the US and Russian Cycle Ergometers
Author(s): Norcross, Jason; Bentley, Jason R.; Moore, Alan D.; Hagan, R. Donald
Abstract: The purpose of this study was to compare the U.S. and Russian cycle ergometers focusing on the mechanical differences of the devices and the physiological differences observed while using the devices. Methods: First, the ...
NASA Center: Johnson Space Center
Publication Year: 2007
Added to NTRS: 2007-12-18
Document ID: 20070023931; Report Number: NASA/TP-2007-214760
The Effect of Increasing Inertia upon Vertical Ground Reaction Forces during Locomotion
Author(s): DeWitt, John K.; Hagan, R. Donald; Cromwell, Ronita L.
Abstract: The addition of inertia to exercising astronauts could increase ground reaction forces and potentially provide a greater health benefit. However, conflicting results have been reported regarding the adaptations to additional ...
NASA Center: Johnson Space Center
Publication Year: 2007
Added to NTRS: 2007-11-13
Document ID: 20070032006
Validation of the Pulmonary Function System for Use on the International Space Station
Author(s): McCleary, Frank A.; Moore, Alan D., Jr.; Hagan, R. Donald
Abstract: Aerobic deconditioning occurs during long-duration spaceflight despite the use of exercise countermeasures. As a part of International Space Station (ISS) medical operations, periodic tests designed to estimate aerobic ...
NASA Center: Johnson Space Center
Publication Year: 2007
Added to NTRS: 2007-11-01
Document ID: 20070031928; Report Number: NASA/TP-2007-214756, S-1006
Determinants of Time to Fatigue during Non-Motorized Treadmill Exercise
Author(s): DeWitt, John K.; Lee, M. C.; Wilson, Cassie A.; Hagan, R. Donald
Abstract: Treadmill exercise is commonly used for aerobic and anaerobic conditioning. During non-motorized treadmill exercise, the subject must provide the power necessary to drive the treadmill belt. The purpose of this study was to ...
NASA Center: Johnson Space Center
Publication Year: 2007
Added to NTRS: 2007-10-23
Document ID: 20070030105
The Effect of Increasing Mass on Locomotion
Author(s): DeWitt, John; Hagan, R. Donald
Abstract: The purpose of this investigation was to determine if increasing body mass while maintaining bodyweight would affect ground reaction forces and joint kinetics during walking and running. It was hypothesized that performing ...
NASA Center: Johnson Space Center
Publication Year: 2007
Added to NTRS: 2007-10-23
Document ID: 20070029235; Report Number: NASA/TP-2007-214757, S-1007
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