<span>Scientists who re-created the 1918 Spanish flu say the killer virus was initially a bird flu that learned to infect people. Alarmingly, they find that today's H5N1 bird flu is starting to learn the same tricks.</span>
A short-term fitness goal could be something as simple as getting up and exercising for 30th minutes a day.
Benchmarks would include you working out at a specific time each day for 30 minutes long.