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.
These forms of exercise help increase the amount of oxygen in your body and also strengthen the heartâs ability to pump it through the bloodstream to the rest of your body. As an added bonus, regular aerobic exercise also helps reduce hypertension, stress, and cholesterol.