When generation of heat exceeds the body’s capacity for heat loss, core temperature rises. Heat illness occurs either when the environmental temperature is high, or when sweating is impaired or its efficacy as a heat loss mechanism is reduced by high ambient humidity. Susceptibility to heat illness is exacerbated by increased muscular activity, other undercurrent illnesses, increasing age and drug therapy (particularly phenothiazines, diuretics and alcohol).
A considerable degree of acclimatization occurs over a period of several weeks in individuals who move to a hot climate or who regularly work in a hot environment. Adaptive mechanisms include stimulation of the sweating mechanism with increased sweat volume and reduced sweat sodium content, and secondary hyperaldosteronism to maintain body sodium balance. The risk of heat-related illness falls as acclimatisation occurs. Heat illness can be prevented to a large extent by adequate replacement of salt and water, although excessive water intake alone should be avoided because of the risk of dilutional Sodium reduction from the body
A spectrum of illnesses those occur in the heat:
Heat cramps
These painful muscle contractions occur most commonly in the legs of young people following vigorous exercise and profuse sweating in hot weather. There is no elevation of core temperature. Salt reduction can occur as a result of persistent sweating.
Heat syncope
This is one type of faint and is related to distant blood vessel dilation in hot weather.
Heat exhaustion
Heat exhaustion occurs with prolonged exertion in hot and humid weather, profuse sweating and inadequate salt and water replacement. There is an elevation in core (rectal) temperature to between 37°C and 40°C.if remains Untreated, heat exhaustion may progress to heat stroke
Heat stroke
This occurs when the core body temperature rises above 40°C and is a severe and life-threatening condition. The symptoms of heat exhaustion include headache, nausea and vomiting. The patient’s skin feels very hot, and sweating is often absent.
The patient should be managed in hospital with rapid cooling by spraying with water (to increase evaporation heat loss), fanning (to increase convection heat loss), and ice packs in the axillae and groins (to increase conduction heat loss). With appropriate treatment, recovery from heat stroke can be rapid (within 1-2 hours) but patients who have had core temperatures higher than 40°C should be monitored carefully complications before discharge from hospital. Clear advice to avoid recurrence, and avoidance of heavy exercise during recovery, are important.
Usually young generation of this time is now very much enthusiastic to build up their career in glamour world. They are coming to various fields such as music, dance, theatre, fashion modeling, interior designing, acting in film industries etc. etc. Ramp modeling is always considered as the basic foot step to enter in the glamour world. Many actors and actresses became famous in the film industry; their starting was from modeling or ramp modeling.
Now a day we pass our time 24/7 in super-aggressive, super-tensed global civilization, always to keep up with and keep on forward. Employees are persistently ordered to carry out additional tasks in the midst of job uncertainty. Almost 3 percent workers miss work per day for anxiety at place of work- The AIS (American Institute of Stress) informs.