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.
Article continues below. Aerobic Conditioning. Aerobic exercises increase blood flow to the muscles and soft tissues of the neck and upper back, which can help loosen the muscles and increase range of motion. In addition, endorphins are also produced after about 30 to 40 minutes of aerobic exercise.