What I Track in a Day
Victoria Song, a senior reporter and author of the Optimizer newsletter, shares her daily tracking regimen as a wearables reviewer. She evaluates health products and claims, including GPS accuracy, workout intensity, and metabolic insights.
Intelligence analysis by Llama

As a wearables reviewer, Victoria Song tracks various health metrics daily, including GPS accuracy, workout intensity, and metabolic insights. Her tracking regimen changes depending on the time of year and product launch season.
Victoria Song is a wearables reviewer who tracks various health metrics daily. She compares different devices to see which ones work best and uses a system called Twin Health to create a digital twin of her metabolism.
Analysis
A Wearables Reviewer's Life of Self-Quantification
Victoria Song, a senior reporter and author of the Optimizer newsletter, has been tracking various health metrics daily as a wearables reviewer. Her regimen includes evaluating GPS accuracy, workout intensity, and metabolic insights. This level of self-quantification is not recommended for normal people, as it is primarily used to evaluate products and claims in the wearables industry.
The Importance of Comparison
The art of wearable testing is steeped in comparison. Victoria compares various wearables and devices to evaluate their performance and accuracy. For instance, she compares the Apple Watch Ultra 3 to the Oura Ring and Fitbit Air to determine which device provides the most accurate readings.
A Digital Twin for Metabolism
Victoria has started building a digital twin for her metabolism using Twin Health, a system that incorporates continuous glucose monitors, blood tests, and an array of other health sensors. This digital twin will provide her with a comprehensive understanding of her metabolic health and help her evaluate the effectiveness of various health products.
The Roster of Wearables
Victoria's current roster of wearables includes screenless fitness trackers, smart scales, and sleep trackers. These devices are used to evaluate various health metrics, including GPS accuracy, workout intensity, and metabolic insights. The roster includes devices such as the Dexcom G7, the Twin Health scale, the Apple Watch Ultra 3, and a Medline blood pressure cuff.
Key points
- Victoria Song tracks various health metrics daily as a wearables reviewer.
- Her tracking regimen includes evaluating GPS accuracy, workout intensity, and metabolic insights.
- Victoria compares various wearables and devices to evaluate their performance and accuracy.
- She is building a digital twin for her metabolism using Twin Health.
- Victoria's current roster of wearables includes screenless fitness trackers, smart scales, and sleep trackers.
Victoria's tracking regimen and use of Twin Health may lead to a better understanding of her metabolic health and the effectiveness of various health products. This could lead to improved health outcomes and more accurate evaluations of health products.
Victoria's tracking regimen may lead to an overemphasis on self-quantification, potentially causing unnecessary stress and anxiety. Additionally, the use of Twin Health may raise concerns about data privacy and security.


