Whoop, a Boston-based technology company that makes the official wearable fitness device of both the PGA Tour and LPGA, is releasing the Whoop Strap 4.0, an update to the fitness and sleep monitoring system worn by scores of professional golfers such as Rory McIlroy, Justin Thomas and Olympic gold medalist Nelly Korda.

Waterproof and designed to be worn 24 hours a day, Whoop measures your heart rate hundreds of times per minute and tracks your level of exertion when you exercise and go about your day, giving it a Strain score. It also tracks the duration and quality of your rest, giving it a Sleep score, and measures how primed your body is at the beginning of each day to exercise and work. with that measurement called a Recovery score. All these scores are creating data Whoop collects, along with proprietary algorithms, and the idea is that by tracking your Strain, Sleep and Recovery numbers in a free smartphone app, Whoop users can learn how different factors – such as travel, alcohol use, diet and different workout intensities – can affect their training. The goal is to help athletes develop a data-created plan to optimize performance and health.

Click the link for more details, and maybe you'll just start tracing your golf fitness!