60 sec
Fast enough to use before a run, gym session, or commute workout.
Pre-exercise awareness tool
Should You Exercise Today or Rest First?
If you are sleep-deprived, highly stressed, or feeling chest tightness, palpitations, dizziness, or unusual shortness of breath, use this 60-second check before you train.
About
A restrained tool for a simple daily question
Cardiac Risk Check is built for runners, gym users, and overworked professionals who need a quick symptom-first reminder before they decide to push, downshift, or rest.
Not a diagnosis engine
This site is designed to slow down bad decisions, not to replace a clinician or clear you for sport.
Built around inputs people can answer today
Planned intensity, recent sleep, work stress, current symptoms, and baseline risk factors are easier to use than lab values or mileage history.
Useful when the body feels off
Especially relevant when you are debating whether to train after poor sleep, heavy stress, or new symptoms you should not ignore.
Calculator
Check today’s exercise readiness
The score is only a proxy for caution. Any chest tightness, unusual breathlessness, or dizziness pushes the result to high risk or above because those are not symptoms to train through.
Pre-exercise checklist
Use this before you call today a training day
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Check whether the session goal is optional.
If the workout can move to tomorrow, recovery usually beats forcing intensity on a compromised day.
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Review the last three nights, not just last night.
Short sleep compounds, and the body often reacts to the accumulated debt rather than a single late night.
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Ask whether stress is already using up your margin.
Long workdays, poor hydration, and emotional strain change how hard a normal workout feels.
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Do not negotiate with warning symptoms.
Chest tightness, dizziness, or unusual breathlessness are reasons to stop, not reasons to test yourself.
Warning signs
Symptoms you should not ignore
This site keeps a conservative bias. When symptoms look like red flags, the default answer is to stop the session and step toward clinical evaluation.
Chest tightness or chest pain
Not a badge of effort. Stop exercise and do not try to “warm through it.”
Palpitations with dizziness
This combination deserves prompt attention, especially if it is new, strong, or recurring.
Unusual shortness of breath
If the breathing difficulty feels out of proportion to the workload, today is not the day to push.
FAQ
Common judgment calls
Is this a medical diagnosis?
No. It is an educational awareness tool designed to support safer decisions before activity.
What if I only slept badly but have no symptoms?
That usually points toward reducing intensity, not automatically canceling all movement. Context still matters.
What if symptoms appear during the workout instead of before it?
Stop the session, reassess, and do not keep testing yourself through chest symptoms, dizziness, or unusual breathlessness.
Why include work and stress hours?
Because poor recovery is rarely caused by training alone. Workload, sleep debt, and symptoms often stack together.
Further reading
Start with the scenario closest to yours
Poor sleep
Recovery
Is it safe to exercise after poor sleep?
Use sleep debt as a signal for downshifting rather than trying to rescue the day with intensity.
Read the article
Symptoms
Running
Palpitations or chest tightness before exercise
Know when to stop the plan before a “quick test” becomes a bad decision.
Read the article
Overwork
Stress
Can overwork increase heart risk?
Why long hours, poor sleep, and stress can narrow your margin before training.
Read the article
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