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 cardio guidelines for improved fitness levels include performing your chosen cardio activity for 20-60 mins at an intensity of 60-90% maximal heart rate (220-age), 3-5 days a week. Build a solid cardio foundation first by training at an intensity of 60-75% maximal heart rate for 30-60 minutes.