defined), suitable physiological testing was completed within the constraints of the Apollo Program to determine if crewmember physiological responses to exercise...

inhalation which remains in the conducting airways where no gas exchange can occur. Total dead space (also known as physiological dead space) is the sum of the...

missions of short duration and so some of the long-term physiological effects of living in space are still unknown. A round trip to Mars with current technology...

devoted to experiments concerning the physiological effects in space. This was the first in-flight use of the "Portable In-flight Landing Operations Trainer"...

9 Hz and up to 153 dB at frequencies above 20 Hz, but the rumored physiological effects did not materialize. The test subjects all reported some physical...

chronic partial sleep loss occur frequently in space flight due to operational demands and for physiological reasons not yet entirely understood. Some astronauts...

Decompression has physical effects on gas filled spaces and on liquids, particularly when they contain dissolved gases. Physiological effects of decompression are...

governing sex in space (intercourse, conception and procreation while weightless) have become a necessary study due to plans for long-duration space missions...

X-15 provided an early opportunity to study the effects of a near-space environment on human physiology. At its highest operational speed and altitude...

suitable breathing gas supply. It, therefore, includes the range of physiological effects generally limited to human ambient pressure divers either freediving...