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Hands in medical gloves hold alarm clock and heart on blue background. Space for text. Health care concept
Blonde young female coach training a young man during interval workout
Normal ECG, 3D illustration showing a standard sinus rhythm with regular P waves, QRS complexes, and stable RR intervals.
hbi horizontal blanking interval.HBI acronym. HBI - Horizontal Blanking Interval: A time period in display technology between scanning lines.
Sport and fitness runner man with headphones running on road training for marathon run doing high intensity interval training sprint workout outdoors in summer

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