The WHOOP 4.0 is a small device that uses sensors to measure your heart rate, temperature, and much more. It's designed to be worn all day and night and collects data 100 times per second.

WHOOP calculates your recovery on a scale of 0 to 100% during your sleep, looking at your heart rate variability (HRV), resting heart rate, respiratory rate, SpO2, sleep performance, and skin temperature to see how your body is adapting to physiological and psychological stress.

Photoplethysmography (PPG) The Technology WHOOP measures blood flow using a technology called Photoplethysmography (PPG). There are LEDs (light-emitting diodes) on the bottom of the strap that shine light into your skin, which is full of tiny capillaries. Blood in the capillaries absorbs more of the light than the tissue surrounding it.

The creative for the WHOOP “The Best Obsess” campaign showcases the deep commitment of some of the world's high performers including rock climber Alex Honnold, Whole30 co-founder and CEO Melissa Urban, the most decorated swimmer of all time, Michael Phelps, leading entrepreneur Steven Bartlett and Liverpool football ...

It's a good health and fitness tracker, and the information provided in the app, along with its motivational tools and advice on when to sleep and recover, is valuable. However, it doesn't provide more than the competition, and that makes the overall cost of owning and using the Whoop problematic.

Optical sensors in the WHOOP 4.0 band continually record your heart rate, heart rate variation, blood oxygenation, breathing rate and skin temperature.

WHOOP calculates multiple different scores, from sleep to strain, and from stress and recovery, providing personalized information that can positively impact several areas of everyday life. WHOOP Sleep provides an in-depth look at sleep performance and lets you know how much sleep you need.

This is how you get the most out of your membership, the band, and the app that goes along with it.

1. Start a journal.
2. Wear the Whoop 4.0 band differently.
3. Track your stress levels.
4. Connect your Whoop to other services.
5. Join a Whoop community.
6. Charge your tracker in the shower.
7. Wake up at the right time.

“Our origins are really in professional sports. We started working with the best athletes in the world when the first product came out. Two of our first 100 users were LeBron James and Michael Phelps. We became partners with the NFL Players Association, so we were distributed to every player in the NFL.

Will Ahmed Will Ahmed, Founder and CEO of WHOOP, discusses his journey building WHOOP and the role he sees it playing in transforming healthcare.

Sports

• WHOOP has been approved as a fitness wearable by various professional sports leagues and their labor unions.
• The wearable is popular among celebrity athletes, including swimmer Michael Phelps, basketball player LeBron James, and golfers Rory McIlroy, Nelly Korda, and Tiger Woods.

What are WHOOP Teams? Teams live in the WHOOP app and allow you to see leaderboards on strain, recovery, and sleep and compare data with other members. When WHOOP first started, it was a platform built specifically for professional organizations including the military, sports teams, and elite training facilities.