Trait #62:

Sleep / wake cycle

At what time in your daily cycle do you perform at your best?

The science

When we feel at our most awake or our most tired is governed by our internal 24-hour circadian clock system.

However, everyone's system does not run on the same schedule, and genetic differences between people can result in different time preferences within our daily cycle.

While some people may be at their most productive early in the day, others may perform at their best during evening or nighttime hours. These personal sleep cycles and daytime preference is often referred to as our ‘chronotype’.

Our circadian rhythm operates through the turning on and off of CLOCK genes which in turn produce or suppress the production of proteins that influence the timings of our sleep/wake cycle.

By analysing variations of these specific genes and understanding their impact on the production of sleep/wake proteins, FitnessGenes can identify whether you have a genetically advanced sleep phase (suggesting a morning preference), delayed sleep phase (suggesting an evening preference), or sit somewhere between the two.

Trait classifications

By analysing genetic variants within the CLOCK, PER and CRY genes that influence our circadian clock system, all FitnessGenes members are placed into one of seven possible trait categories:

  • Advanced sleep-phase type
  • Mild morning preference
  • Increased morning preference
  • Average
  • Mild evening preference
  • Increased evening preference
  • Delayed sleep-phase type

Recommended actions

All seven trait classifications include a collection of personalised lifestyle, nutrition and exercise-related actions to help our members maximise the impact of their daily behaviours, such as exercise.

For individuals with an increased evening preference or delayed sleep-phase type, exercising late in the day is likely to be most beneficial as this is when they’re in their optimal physiological state.

The opposite is likely true for those with a morning preference or advanced sleep-phase type, who should exercise in the morning or early afternoon for the best results.

Learn more

Download an example sleep/wake cycle trait report to preview the insights and actions that you may receive.
*Not personalised - DNA analysis or DNA upload required.

For a complete introduction into the circadian clock system, the genes that influence it, and the trait’s various classifications, read the sleep/wake cycle science blog.

Discover your personal traits

This is just one of 100+ traits that you can unlock with the FitnessGenes DNA analysis.

From a single saliva sample, you can also discover your personal traits relating to:

Vitamins and minerals requirement

Muscle growth and performance

Sleep quality and duration

Metabolic efficiency

Overeating and obesity risk

Aerobic capacity

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