Difficult or demanding situations that test a person’s abilities and require effort, skill, or determination to overcome.
Challenge
A physical and emotional response to pressure, demands, or challenging circumstances.
Stress
Specialized tools, devices, or machinery used to perform specific tasks, especially in technical or professional environments.
Equipment
The capacity to recover quickly from difficulties and maintain emotional strength during adversity.
Resilience
An environment, such as space, where gravity is extremely weak and objects appear to float.
Microgravity
The amount of mass in a given volume; how compact or concentrated matter is in a substance.
Density
The body’s biological system that protects against infections and harmful microorganisms.
Immune system
Natural internal cycles that regulate sleep, wakefulness, and other body processes over approximately 24 hours.
Circadian rhythms
A state of intense physical or mental exhaustion caused by prolonged activity or lack of rest.
Fatigue
Separated from social contact or normal surroundings for an extended period of time.
Isolated
Energy that travels through space in waves or particles and can affect living tissue.
Radiation
To adjust physically or behaviorally in order to function successfully in new or changing conditions.
Adapt
Structured and repeated patterns of actions or behaviors performed regularly
Routines
A mental health disorder characterized by persistent sadness, low motivation, and decreased interest in daily activities.
Depression
