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ncycgdxhl
Wysłany: Pią 22:46, 07 Sty 2011
Temat postu: 28-day head-down bed rest in the use of lower body
28-day head-down bed rest in the use of lower body negative pressure against the measures of heart rate variability
Level of LBNP time only 3rain, then R-R time has not yet reached steady state, the spectral analysis results are not allowed. Recently, we observed a 5, a 15, one 25, one 30, one 50mmHgLBNP changes in heart rate spectral components, each level of negative pressure to maintain the time 10rain, was found in a 15mmHg decreased when the sympathetic activity, and from - 40mmHg beginning, the sympathetic activity has increased. Harkel found no indicators 10d autonomic changes after bed rest, and bed time is short and time is short on heart rate collection. LBNP after bed rest and total power spectrum (P \arterial baroreceptor reflex in the regulation as a major way to the small stability of the system relatively simple. from the right side of the curve in Figure 2 shows a greater heart rate variability wave. accompanied by small changes or no high-frequency changes in high frequency, Pm value decreased and a relatively steep slope also confirmed the above formulation. The first set of experiments applied in the bed protection when using the protective measures in this way is based on the following considerations: the recent tension in that short time exercise on blood vessels and plants favorable balance nerve, skeletal muscle tension can be maintained to maintain the peripheral vascular compliance, but a small role opposite position load. long asked the movement in addition to maintaining vascular tension, the opposite reaction from the role of bit loading is also small. Therefore, we would like to adopt short-term exercise + LBNP, of time-less, may also play good results. Unfortunately, it does not prevent the bed due to cardiovascular disorders, this work remains to be further studied. Conclusion The results show that the bed can be caused the decline in heart rate variability. LBNP before and after bed when the gradual change in heart rate variability. speculated to prevent cardiovascular deconditioning after bed rest or space protection measures are frequently LBNP + occasional aerobic and resistance movement. CGSA method of heart rate variability found in the harmonic wave and some components of the change. present and previous studies the data due to too little heart rate limit its analysis, the analysis in the future level of LBNP for each little longer to understand the sympathetic and parasympathetic activity. SHEN Xian-yun translated ~ Aviatlom, spaceandEnvironmentalmedieine.1994,
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, 4:293 \* Nico Lyle, Mauricio Francis Kelly and let a g Leyva. This three space shuttle mission specialist astronauts are, that is responsible for the activities of aircraft during flight planning,
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, materials management and operation of space experiments load members. This three mission specialist astronauts participating in the training are different, Mauricio Francis Kelly and let a g Leyva astronaut candidates have completed their qualifying period and into advanced training stage, and Claude Nico Lyle for mission specialist training in order to perform as a crew l2 months of 1993, Han Bo Space Telescope repair mission for the first time. Mauricio - Francis Kelly and let a g Leyva was in May 1992 was European Astronaut Centre European astronaut candidate elected, and they center in Cologne, Germany for a short initial training, add the NASA1992 grade astronaut candidates (ASCAN) '~ II training classes,
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, which is that NASA decided to point increase in first-year results of an international flavor, in addition to the 19 candidates for the U.S., it had also absorbed the five candidates in other countries (EsA2 name, 2 the Canadian Space Agency, Japan National Space Development Agency 1). ASCAN training program lasted 12 months, including 36 weeks of basic training and subsequent 16-week advanced training. Kelly and Ke Laiwa in August 1992 to begin their basic training. basic training basic training is progressive,
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, and each stage were based on the previous stage, gradually increase the space shuttle and its systems of training. Training courses include: - T a 38 supersonic jet trainer for a space shuttle flight of a shuttle system,
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, the basic principles of each system function and operation of a space shuttle mission and procedures for the implementation of a variety of applied science and technology in preparation for the period T of a 38 flight training, the candidates learn the aircraft systems and flight rules, but also the students on the land, water escape, Emergency procedures and gliding parachuting out of tank practice course, these courses in various military bases. for these] 6
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