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A man taking a nap in the spring. Springtime lethargy is the state of fatigue, lowered energy, or depression associated with the onset of spring. Such a state may be caused by a normal reaction to warmer temperatures, or it may have a medical basis, such as allergies or reverse seasonal affective disorder. [1]
Cold sensitivity or cold intolerance is unusual discomfort felt by some people when in a cool environment. [ 1 ] Cold sensitivity may be a symptom of hypothyroidism , anemia , low body weight, iron deficiency , vitamin B 12 deficiency , fevers , fibromyalgia or vasoconstriction . [ 2 ]
People enjoying the winter weather outdoors in Helsinki, Finland. Humans are sensitive to winter cold, which compromises the body's ability to maintain both core and surface heat of the body. [30] Slipping on icy surfaces is a common cause of winter injuries. [31] Other injuries from the cold include: [32]
Cold weather isn’t always to blame. We’ll break down why you might be experiencing chronically cold hands.
The human body always works to remain in homeostasis. One form of homeostasis is thermoregulation. Body temperature varies in every individual, but the average internal temperature is 37.0 °C (98.6 °F). [1] Sufficient stress from extreme external temperature may cause injury or death if it exceeds the ability of the body to thermoregulate.
In many species, activity is diminished during the winter months, in response to the reduction in available food, the reduction of sunlight (especially for diurnal animals), and the difficulties of surviving in cold weather. Hibernation is an extreme example, but even species that do not hibernate often exhibit changes in behavior during the ...
Fatigue is a state of tiredness (which is not sleepiness), exhaustion [1] or loss of energy. [2] [3]Fatigue (in the medical sense) is sometimes associated with medical conditions including autoimmune disease, organ failure, chronic pain conditions, mood disorders, heart disease, infectious diseases, and post-infectious-disease states. [4]
The subarctic climate (also called subpolar climate, or boreal climate) is a continental climate with long, cold (often very cold) winters, and short, warm to cool summers. It is found on large landmasses, often away from the moderating effects of an ocean, generally at latitudes from 50°N to 70°N, poleward of the humid continental climates .