Self-Experimentation Guide for Performance | WHOOP

When it comes to supplements, workout routines, and dietary choices, what works for someone else may not work for you. The WHOOP Journal helps you discover the impact of your habits and behaviors through self-experimentation, connecting your daily choices to your physiological data. This guide will show you how to use the Journal to build experiments, interpret your results, and optimize your routine for better performance.

What is the WHOOP Journal

The WHOOP Journal is a feature in the app that connects your daily behaviors to your physiological data. By logging choices like diet, caffeine intake, or stress levels, you can see how they impact your Sleep, Strain, and Recovery. It helps you identify the habits that help or hurt your performance.

How the Journal works

Each morning after your Sleep is processed, WHOOP will prompt you to answer your Journal questions. You can customize which behaviors you want to track from over 300 options. Access the Journal anytime from the Plan tab to log behaviors or adjust your questions.

Using the WHOOP Journal

You can choose from over 300 behaviors to monitor in the WHOOP Journal. For clear results, track no more than 10 behaviors at a time. After logging at least 5 'yes' and 5 'no' responses for a behavior within a 90-day period, it will appear in your Impacts tab.

Be aware of confounding factors that can impact your results. For example, if you're testing how hydration affects sleep, avoid alcohol or late meals. Both significantly influence sleep metrics and could skew your findings.

If you take supplements like creatine, magnesium, or AG1, track them daily to see their impact on your health and recovery. Supplements support your baseline health by nourishing your brain, gut, and immune system. This can influence sleep, recovery, and overall performance.

Understanding your results

After a few weeks of logging, check your Impacts to see how your behaviors relate to your WHOOP data. Navigate to the Plan tab in the app and select Insights. Notable relationships between your metrics and behaviors reveal which habits are driving your Sleep, Strain, and Recovery scores.

Below are examples of Journal behaviors that can have a positive impact on Recovery.

Building your experiment

Self-experimentation helps you understand your optimal habits and behaviors. The WHOOP Journal lets you create mini experiments to isolate the impact of specific behaviors. Start by identifying factors that influence your mental, physical, or emotional health — like hydration, alcohol, gratitude, supplements, or meal timing.

Next, define your dependent variable. If you want to know whether hydration improves your sleep, your sleep metrics become the dependent variable. Stick to a consistent routine so timing stays controlled throughout your experiment.

Start your self-experimentation

Understanding yourself is the path to unlocking your potential. The Journal provides the data, and self-experimentation provides the framework. Pick one or two behaviors you're curious about, log them consistently, and review your Impacts.

Small discoveries lead to meaningful, long-term improvements in your health and performance.

Frequently asked questions about the WHOOP Journal

How many behaviors should I track at once?

Focus on a small number of behaviors at a time for the clearest insights. We recommend tracking fewer than 10 to avoid confounding variables and make it easier to identify which actions have the biggest impact.

How long does it take to get a Behavior Impact analysis?

You will see analysis in your Impacts tab after logging at least five 'yes' and five 'no' responses for a behavior within a 90-day period. Consistency is key to generating insights faster.

What are some of the most impactful behaviors members track for better Recovery?

Impact is highly individual, but many members find that sleep hygiene, hydration, and alcohol consumption have significant effects on Recovery scores. These behaviors consistently show measurable relationships in the Impacts analysis.