The only thing we really know with 100% certainty is that humans have been taking DMT for several thousand years. In 1990, two mummified human bodies were dug up near the Matanza River in northwestern Argentina. The mummies were very well preserved, both being adorned with high quality woolen mantles.
Just 30 minutes of swimming three times per week can boost your energy levels through increased metabolic rate. Exercising without the sweat. If sweating puts you off other forms of exercise, fear not!
The guidelines suggest anywhere from 20 to 60 minutes of cardio to be healthy, lose weight and get fit, depending on the types of workouts you do. That's fine, but you don't want to start with an hour of exercise. That's just too much for anyone if you haven't exercised for awhile...or ever.