Whoop has won over investors and quickly became commonplace in pro sports, with early fans including LeBron James and Michael Phelps, and recently raising a USD 100 million Series E at a USD 1.2 billion valuation. Whoop is a monthly subscription for 24/7 health monitoring across sleep, recovery and strain, including free hardware (Whoop Strap 3.0) and a coaching platform designed to optimize behavior.

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