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.
In many cases, you can improve your brain chemistry with something as simple as regular exercise. Getting 150 minutes of moderate aerobic activity per week is an important part of staying healthy. It can boost your mood and energy, while strengthening your muscles, lungs, and heart.