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.
How to Do Aerobics. Broadly speaking, aerobic exercise requires you to work out your large muscle groups like your arms and legs. By raising your breathing and heart rates, you increase oxygen flow to your muscles, while also allowing your blood flow to remove carbon dioxide and lactic acid buildup in your muscles.