Wearable Heart Rate Dataset during Swimming Trials

Heart rate dataset acquired simultaneously from three devices: a Polar smartwatch, a Polar H10 chest strap, and a Garmin smartwatch. Measurements were collected across multiple experimental conditions: dry rest, rest in water, swimming, and running. The dataset includes time points for which all three heart rate signals are available. Occasional gaps in the original recordings may occur due to sensor contact issues, motion artifacts, or device-specific acquisition problems. Variables:- datetime: ISO 8601 timestamp- subject_id: subject identifier- trial_code: numeric code for the experimental condition- trial_label: experimental condition label (dry_rest, rest_in_water, swimming, running)- hr_polar_watch_bpm: heart rate from Polar smartwatch (bpm)- hr_polar_h10_bpm: heart rate from Polar H10 (bpm)- hr_garmin_bpm: heart rate from Garmin smartwatch (bpm) This dataset supports reproducible analyses of heart rate measurements from different wearable and reference devices across multiple activity types.