Myths vs facts: Fitness | LifestyleCheck and Schlaf

Many fitness and lifestyle tests promise personalized recommendations for sleep, exercise, and nutrition. The reality: most claims are based on weak or purely mechanistic evidence. For example, a DNA test might show a variant in the CLOCK or PER3 gene, but its impact on your actual sleep is small and overshadowed by environmental factors. Fitness trackers often measure inaccurately and interpret data like sleep stages or HRV with questionable algorithms. A 'LifestyleCheck' based on such data is therefore usually not valid. Instead of expensive tests, proven measures like regular exercise, adequate sleep (7–9 h), and a balanced diet are demonstrably more effective. Don't be misled by marketing promises: without medical evaluation, many of these tests remain mere entertainment.