THE EFFECT OF THE GRAVITY-LOADING COUNTERMEASURE SKINSUIT (GLCS) UPON MAXIMAL AEROBIC CAPACITY (VO2 MAX)

METHODS: Six subjects ([female]4; 27.5+ or -5.9 yrs; 173.6+ or -9.7 cm; and 77.3+ or -8.3 kg) who gave written informed consent to participate were fitted with a custom-fabricated GLCS. Lactate, heart rate, core temperature, and breath-by-breath respiratory parameters were recorded along with subjec...

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Bibliographic Details
Published in:Aviation, space, and environmental medicine space, and environmental medicine, 2014-03, Vol.85 (3), p.352-352
Main Authors: Attias, J, Evetts, S, Waldie, J, Green, D
Format: Article
Language:English
Subjects:
Aviation
Discomfort
Earth
Fittings
Heart rate
Lactates
Oxygen consumption
Parameters
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Summary:METHODS: Six subjects ([female]4; 27.5+ or -5.9 yrs; 173.6+ or -9.7 cm; and 77.3+ or -8.3 kg) who gave written informed consent to participate were fitted with a custom-fabricated GLCS. Lactate, heart rate, core temperature, and breath-by-breath respiratory parameters were recorded along with subjective comfort, body control and RPE during performance of a Vo sub(2Max) test (Bruce ergometer protocol), when wearing either the GLCS, or loose fitting gym attire (GYM). RESULTS: Actual Vo sub(2Max) did not differ between GLCS and GYM, nor with previously predicted VO sub(2Max) values (obtained from the same subjects in a previous study). However, there was a significant interaction between Vo sub(2Max) test type and attire, with predicted Vo sub(2Max) being the greatest in the GLCS [F(1, 5) = 6.250; P=0.049]. No significant difference in wattage required to achieve Vo sub(2Max) was found between attires; however, work product (wattage * time) was significantly lower in the GLCS (P=0.039). Additionally, no significant difference between the wattage achieved at the (lactate) anaerobic threshold (AT) and ventilatory breakpoint was observed in either attire. Heart rate, lactate, core temperature and all breath-by-breath parameters (VT, FR, TI/TTOT, VE, RER, Eqo2, Vco sub(2) and Eqco sub(2)) did not differ between attires at Vo sub(2Max). Movement discomfort was significantly greater in the GLCS vs. GYM, both at rest (p=0.05) and at V[degrees]2Max (P=0-024), when significantly lower body control was also observed (P=0.027). DISCUSSION: Actual Vo sub(2Max) was similar in the GLCS vs. GYM, although less cycling work (and thus time) was achieved, suggestive that the GLCS may be a potential adjunct to aerobic exercise on Earth and in space.
ISSN:0095-6562