Caffeine Tolerance

In psychology, stress is a feeling of strain and pressure. Small amounts of stress may be desired, beneficial, and even healthy. Positive stre...

A feeling of worry, nervousness, or unease, typically about an imminent event or something with an uncertain outcome.

Known as the stress hormone, cortisol is a steroid hormone, in the glucocorticoid class of hormones. When used as a medication, it is known as...

Depression is a state of low mood and aversion to activity or apathy that can affect a person's thoughts, behavior, feelings and sense of well...

Fatigue (also called exhaustion, tiredness, languidness, languor, lassitude, and listlessness) is a subjective feeling of tiredness which is d...

Anger or wrath is an intense emotional response. It is an emotion that involves a strong uncomfortable and emotional response to a perceived p...

Job stress can be defined as the harmful physical and emotional responses that occur when the requirements of the job do not match the capabil...

Post-traumatic stress disorder (PTSD) is a mental health condition that's triggered by a terrifying event — either experiencing it or witnessi...

Sadness is an emotional pain associated with, or characterized by, feelings of disadvantage, loss, despair, grief, helplessness, disappointmen...