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A woman wearing a yellow top looks down at her smart watch, which has a graphic of a red heart above it with numbers circling.

A woman with a long, dark ponytail wears a smart watch in a green athletics singlet

A close up shot of a man with dark hair and beard wearing glasses.

A woman wearing a grey singlet has her hand on the side of her head, revealing a pink smart watch.

A woman is asleep on grey bed sheets, with a grey smart watch clearly visible.

A woman with long brown hair wears a cream suit jacket and blue smart watch.

"Higher HRV yields more capacity to train, whereas low HRV means less robustness and less capacity to train."

Three smartphones, one displaying a partial red circle around 30%, a 2/3 circle with 66%, an almost complete green circle, 96%

Four wine glasses cheers in dim light.

 'Boosts' HRV'Harms' HRV
1.Sleep quality and durationAlcohol
2.CaffeineFever
3.Consistent wake-up timeSleep at altitude
4.Consistent bed timeHigh stress zone
5.Daylight eatingSickness
Source: WHOOP 2024 Year in Review user data

An elderly woman with goggles and a swim cap looks and touches her smart watch on the edge of a swimming pool

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