Captain David Minard, MC, USN (May 23, 1913 – October 9, 2005) was an American physiologist who was heat stress physiologist for Project Mercury, the United States' first human spaceflight.
In the late 1950s, Minard as a captain in the U.S.
Navy and head of the physiology department at the Naval Medical Research Institute, helped to develop the Wet Bulb Globe Temperature Index utilized to measure heat stress in the military and other industrial settings.
Minard, with Constantin Yaglou, created the wet bulb globe temperature index in 1957 for U.S.
Marines training at Parris Island, South Carolina.
It is still commonly used as a heat-stress index in the military, steel mills, marathon races and industrial environments.
In 1960, Minard used the heat stress index to evaluate the Mercury Seven astronauts for Project Mercury astronauts at the Naval Medical Research Institute in Bethesda, Maryland.