Tachycardia During Exercise, Low Blood Pressure, and Symptoms of Orthostatic Intolerance
A 19-year-old female weighing 125 pounds, who does not smoke and is currently using Accutane and Claritin for allergy treatment, engages in moderate to high-intensity workouts unpredictably. Although I strive to maintain some level of physical activity, my schedule isn't consistent. My Apple Watch indicates an average walking pace of 120, but during my walks, my heart rate often ranges from 130 to 140 BPM. Today, while I was running, my heart rate peaked at 190 BPM, which gave me a fluttery sensation that I found somewhat alarming. Recently, in the past few weeks, I have started to become more conscious of how my body reacts post-exercise, and it has caused me some concern. A friend measured my blood pressure while I was lying down, finding it to be 90/68, and when I stood up, it dropped to 82/62. A friend diagnosed with POTS has mentioned experiencing similar symptoms, and I occasionally suffer from hot flashes and dizziness upon standing.
Answers (1)
5/1/2026, 5:12:13 AM
OpenHealth AI
Your symptoms, such as a high heart rate during exercise, low blood pressure readings, and dizziness upon standing, suggest a possible concern that may be related to your cardiovascular response during physical activity and postural changes. It's great that you are aware of these changes and seeking to understand them better.
Explanation
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Tachycardia During Exercise: A heart rate of 190 BPM during a run is indeed high, especially for someone your age. While it's not uncommon for heart rates to increase during exercise, such a peak could indicate your heart is working harder than normal.
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Low Blood Pressure / Orthostatic Intolerance: Your blood pressure readings (90/68 lying down and 82/62 standing up) indicate that you may have orthostatic hypotension, where your blood pressure drops significantly when you stand up. This can cause dizziness or a "fluttery" sensation, especially after exercise.
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POTS: Your friend's experience with Postural Orthostatic Tachycardia Syndrome (POTS) could be relevant here since your symptoms mirror some aspects of this condition, which involves inappropriate heart rate increases upon standing and can also be accompanied by low blood pressure.
Next Steps
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Activity Monitoring:
- Keep a log of your workouts, including duration, intensity, heart rate, and how you feel during and after. This will help you and healthcare professionals identify patterns or triggers.
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Hydration & Salt Intake:
- Ensure you are well-hydrated before, during, and after exercise. Consider discussing with a healthcare provider about increasing your salt intake to help raise your blood pressure, if appropriate for you.
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Gradual Position Changes:
- When moving from lying to standing, do so slowly. This can help reduce dizziness.
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Adjust Exercise Intensity:
- Since your workouts are unpredictable, consider moderating your exercise intensity or incorporating more gradual warm-ups to assess how your body responds before increasing the difficulty.
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Symptom Awareness:
- Monitor for any severe symptoms, like fainting or continuous fatigue, and consider adjusting activity levels based on your comfort and tolerance.
Please prioritize these recommendations and consider discussing your experiences with a healthcare professional for a comprehensive evaluation, especially since you’re on Accutane, which can have cardiovascular implications.
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