Accession Number : ADA294185

Title :   The Impact of the NBC Clothing Ensemble on Respiratory Function and Capacities During Rest and Exercise.

Descriptive Note : Technical rept.,

Corporate Author : ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA

Personal Author(s) : Muza, Stephen R. ; Banderet, Lou ; Forte, Vincent A.

PDF Url : ADA294185

Report Date : MAY 1995

Pagination or Media Count : 74

Abstract : This study examined the effects of wearing a modified MOPP (mMOPP) overgarment (Protective Clothing, PC), configured with body armor (BA), Load Bearing Equipment (LBE), and M40 CB mask on the pattern and mechanics of breathing and cognitive functioning in 15 male soldiers at rest and during sustained submaximal exercise (approx. 600 W). The M40 CB mask reduced breathing capacity 20%, and the PC+BA+LBE components of the mMOPP reduced it 5%. Total respiratory system compliance decreased by 16% in the mMOPP. Thus, wearing the PC+BA+LBE increased the "stiffness" of the soldier's respiratory system. During exercise, the mMOPP decreased tidal volume and increased respiratory rate, a compensation for the decreased respiratory system compliance. Although the M40 CB mask imposes a significant impairment to breathing, the PC with BA and LBE presents a unique external constraint on breathing, which may be more aversive than that imposed by the CB mask. These impairments may be reduced by wearing BA and LBE that are properly fitted over the PC and incorporating, in future designs, enhancements that allow for outward expansion of the PC, BA or LBE with inhalation.

Descriptors :   *NUCLEAR WARFARE, *BIOLOGICAL WARFARE, *CHEMICAL WARFARE, *RESPIRATORY SYSTEM, *PROTECTIVE CLOTHING, *EXERCISE(PHYSIOLOGY), VOLUME, ARMY PERSONNEL, LOADS(FORCES), COGNITION, STIFFNESS, RATES, MECHANICS, PATTERNS, SUPPORTS, EXPANSION, RESPIRATION, CLOTHING, MASKS, INHALATION, TIDES, BODY ARMOR.

Subject Categories : Chemical, Biological and Radiological Warfare
      Nuclear Warfare
      Stress Physiology
      Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE