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  2. Athletic heart syndrome - Wikipedia

    en.wikipedia.org/wiki/Athletic_heart_syndrome

    Athletic heart syndrome (AHS) is a non-pathological condition commonly seen in sports medicine in which the human heart is enlarged, and the resting heart rate is lower than normal. The athlete's heart is associated with physiological cardiac remodeling as a consequence of repetitive cardiac loading. [ 3 ]

  3. What’s the Difference Between a Normal and Dangerous Heart Rate?

    www.aol.com/difference-between-normal-dangerous...

    High heart rates with associated symptoms such as chest tightness, palpitations or heart pounding/racing, fainting, dizziness, lightheadedness, shortness of breath, or fatigue, it may suggest an ...

  4. Heart rate - Wikipedia

    en.wikipedia.org/wiki/Heart_rate

    Tachycardia is a high heart rate, defined as above 100 bpm at rest. [4] Bradycardia is a low heart rate, defined as below 60 bpm at rest. When a human sleeps, a ...

  5. Tachycardia - Wikipedia

    en.wikipedia.org/wiki/Tachycardia

    Tachycardia, also called tachyarrhythmia, is a heart rate that exceeds the normal resting rate. [1] In general, a resting heart rate over 100 beats per minute is accepted as tachycardia in adults. [1] Heart rates above the resting rate may be normal (such as with exercise) or abnormal (such as with electrical problems within the heart).

  6. What do I do if my resting heart rate is too high or low? - AOL

    www.aol.com/finance/resting-heart-rate-tell-lot...

    Smartwatches and other fitness trackers are great for people seeking detailed, long-term data about their resting heart rate, but high-tech gadgets are hardly necessary, Ebinger says. All you need ...

  7. Exercise intensity - Wikipedia

    en.wikipedia.org/wiki/Exercise_intensity

    Heart Rate is typically used as a measure of exercise intensity. [2] Heart rate can be an indicator of the challenge to the cardiovascular system that the exercise represents. The most precise measure of intensity is oxygen consumption (VO 2). VO 2 represents the overall metabolic challenge that an exercise imposes.

  8. Everything You Need to Know About Your Heart Rate and HIIT - AOL

    www.aol.com/everything-know-heart-rate-hiit...

    To keep your fitness regimen from falling stale, now is the perfect time to incorporate HIIT (or high-intensity interval training). The key to successful HIIT is in your heart rate. The short ...

  9. Physiology of marathons - Wikipedia

    en.wikipedia.org/wiki/Physiology_of_marathons

    The highest heart rate an individual can achieve is limited and decreases with age (Estimated Maximum Heart Rate = 220 - age in years). [12] Despite an increase in cardiac dimensions, a marathoner's aerobic capacity is confined to this capped and ever decreasing heart rate. An athlete's aerobic capacity cannot continuously increase because ...