2018-04-102018-04-101974http://hdl.handle.net/2152.3/7786A presentation slide, dated March 22 and titled Skylab Crew Health Trend-M171 Heart Rate at Max Exercise.Skylab Crew Health TrendM171 Heart Rate at Max ExerciseDr. Charles BerrySpace Medicinepresentation slideSkylab Crew Health Trend-M171 Heart Rate at Max ExerciseA presentation slide, dated March 22 but no noted year, and titled