Polar bears are in danger of extinction in the future if globalwarming continues, as their habitat, Arctic sea ice, is shrinkingevery year, making it difficult for bears to have enough food tolast through the lengthening summers.With a population of nearly 25,000, the polar bear is not in dangerof extinction now.
Aerobic exercise stimulates the growth of new neurons, also known as neurogenesis through the release of brain-derived neurotopic factors. Endurance exercises release Irisin, a hormone linked to improved cognitive function, fat loss and overall health.
This helps to reduce body fat and to keep blood glucose at a normal level which helps you to exercise for a longer period of time. Release of growth hormone from the pituitary gland in the brain is increased with increasing aerobic exercise time, especially more intense exercise such as interval training.