- Thirty years ago, researchers asked subjects to stay in bed and measured their health.
- Three weeks later, the subjects demonstrated changes in their health similar to aging 20 years.
- The same subjects were tested 30 years late and found that actual aging (thirty years) was still less aggressive than the original three weeks in bed.
- However, after being put on an exercise program, the changes were reversed.
A 30-year follow-up of the Dallas Bedrest and Training Study: I. Effect of age on the cardiovascular response to exercise.