health
Heart Rhythm Disturbance
Adverse effectHeart Rhythm Disturbance is an unwanted health outcome involving the heartbeat or the heart’s electrical conduction. A person may notice palpitations, while other disturbances may be identified through abnormal conduction patterns rather than a sensation.
A concise starting point for understanding Heart Rhythm Disturbance as a health topic.
These are research findings, not promises. Most options have little evidence, and results differ from person to person.
What can cause it
How likely each one is to cause it, most likely first.
CardiopracticePossible
Based on one study. Strongest study: a pooled analysis of several trials.
Pooled analyses whose designs were not recorded described discomfort and arrhythmia during exercise training.
Open the Cardio pageHigh-Intensity Interval Training (HIIT)practiceUnclear
Based on 6 studies. Strongest study: a pooled analysis of several trials.
A pooled analysis of randomized trials reported serious adverse events that included fatal arrhythmia and acute myocardial infarction. A separate review of human studies reported cardiovascular events.
Open the High-Intensity Interval Training (HIIT) pageYogapracticeUnclear
Based on 3 studies. Strongest study: a randomized controlled trial.
A review pooling studies whose designs were not recorded included sudden cardiac arrest during hot yoga. A trial involving 80 participants reported severe medical complications leading to withdrawal, including severe arrhythmia.
Open the Yoga pageStrength TrainingpracticeUnclear
Based on 2 studies. Strongest study: a systematic review of studies.
A 2024 systematic review with pooled study designs not recorded listed arrhythmia among cardiovascular events, alongside myocardial infarction and hypertension. A 2025 systematic review also reported arrhythmia and systemic saturation <80%.
Open the Strength Training pageIce Bath / Cold PlungepracticeUnclear
Based on 3 studies. Strongest study: a study that followed people over time.
A cohort study recorded isolated ventricular extrasystoles, and a separate study recorded ectopic beats during immersion. These findings describe observed rhythm disturbances rather than how often they occur.
Open the Ice Bath / Cold Plunge pageHot YogapracticeUnclear
Based on one study. Strongest study: a systematic review of studies.
A 2025 systematic review of randomized and non-randomized human studies described a single case of sudden cardiac arrest during hot yoga in a 35-year-old female.
Open the Hot Yoga pageHot BathpracticeUnclear
Based on one study. Strongest study: a non-randomized trial.
A 2005 quasi-experimental study reported supraventricular extrasystole and ventricular tachycardia during bathing.
Open the Hot Bath pageCyclingpracticeUnclear
Based on 3 studies. Strongest study: a small pilot study.
A pilot study of 20 people recorded transient ectopic beats that caused no symptoms. A review also discussed cardiac arrhythmias, but did not establish how often they occur during cycling.
Open the Cycling page
The expert view shows every study, dose protocol and source.
What can cause it
Interventions reported to bring this on15 listedHighest probability
- →PracticesCardioCertaintyMediumSourceClinical1 other source
Pooled analyses whose designs were not recorded described discomfort and arrhythmia during exercise training.
Who was studied
- People with a condition
Open CardioStudy result
Discomfort and arrhythmia during exercise training
Low probability(14)(1)(13)
- →PracticesHigh-Intensity Interval Training (HIIT)CertaintyLowSourceClinical6 other sources
A pooled analysis of randomized trials reported serious adverse events that included fatal arrhythmia and acute myocardial infarction. A separate review of human studies reported cardiovascular events.
Who was studied
- Healthy people and patients
- Asthma
- Cancer
- Cardiomyopathy
- Chronic Pain
- Copd
- Coronary Artery Disease
- +9 more
Open High-Intensity Interval Training (HIIT)Study result
Serious adverse events (fatal arrhythmia, acute myocardial infarction)
- →PracticesYogaCertaintyLowSourceClinical3 other sources
A review pooling studies whose designs were not recorded included sudden cardiac arrest during hot yoga. A trial involving 80 participants reported severe medical complications leading to withdrawal, including severe arrhythmia.
Who was studied
- People with a condition
- Addiction Drugs
- ADHD
- Depression
- Obesity
Open YogaStudy result
Sudden cardiac arrest during hot yoga
- →PracticesStrength TrainingCertaintyLowSourceClinical2 other sources
A 2024 systematic review with pooled study designs not recorded listed arrhythmia among cardiovascular events, alongside myocardial infarction and hypertension. A 2025 systematic review also reported arrhythmia and systemic saturation <80%.
Who was studied
- People with a condition
Open Strength TrainingStudy result
Cardiovascular events (arrhythmia, myocardial infarction, hypertension)
- →PracticesIce Bath / Cold PlungeCertaintyLowSourceClinical3 other sources
A cohort study recorded isolated ventricular extrasystoles, and a separate study recorded ectopic beats during immersion. These findings describe observed rhythm disturbances rather than how often they occur.
Who was studied
- Healthy people
Open Ice Bath / Cold PlungeStudy result
Isolated ventricular extrasystoles
- →PracticesHot YogaCertaintyLowSourceClinical1 other source
A 2025 systematic review of randomized and non-randomized human studies described a single case of sudden cardiac arrest during hot yoga in a 35-year-old female.
Who was studied
- Healthy people
- ADHD
- Depression
- Obesity
Open Hot YogaStudy result
Sudden cardiac arrest during hot yoga (single case, 35-year-old female)
- →PracticesHot BathCertaintyLowSourceClinical1 other source
A 2005 quasi-experimental study reported supraventricular extrasystole and ventricular tachycardia during bathing.
Who was studied
- People with a condition
- Coronary Artery Disease
- Respiratory Failure
Open Hot BathStudy result
Supraventricular extrasystole and ventricular tachycardia during bathing
- →PracticesCyclingCertaintyLowSourceClinical3 other sources
A pilot study of 20 people recorded transient ectopic beats that caused no symptoms. A review also discussed cardiac arrhythmias, but did not establish how often they occur during cycling.
Who was studied
- Healthy people and patients
Open CyclingStudy result
Transient asymptomatic ectopic beats
- →PracticesOzone TherapyCertaintyLowSourceClinical1 other source
A 2018 case report describes cardiopulmonary arrest in one person. A single case does not establish how often this occurs or whether Ozone Therapy caused it.
- →PracticesWim Hof Method BreathingCertaintyLowSourceReference knowledge2 other sources
Autonomic activation and electrolyte shifts may lead to palpitations or arrhythmias. People have also reported heart rhythm disturbances in connection with this practice.
Open Wim Hof Method BreathingStudy result
Palpitations or arrhythmias from autonomic activation and electrolyte shifts.
- →PracticesChelation Therapy (Non-Medical)CertaintyLowSourceReference knowledge1 other source
A pharmacology reference notes that profound calcium depletion caused by chelation can provoke dangerous cardiac rhythm disturbances.
Open Chelation Therapy (Non-Medical)Study result
Profound chelator-induced calcium depletion can provoke dangerous cardiac rhythm disturbances.
- →PracticesCoffee EnemaCertaintyLowSourceReference knowledge1 other source
Rare serious rhythm disturbances may result from caffeine exposure, dehydration, or electrolyte depletion.
- →PracticesFinnish SaunaCertaintyLowSourceReference knowledge1 other source
Pharmacology references describe how sauna heat raises heart rate and sympathetic drive, while heavy sweating can lead to fluid and potassium loss; these changes can trigger extra beats or an irregular rhythm, mainly in people with heart disease or after alcohol or a cold plunge.
Open Finnish SaunaStudy result
Sauna heat raises heart rate and sympathetic drive, and heavy sweating loses fluid and potassium; this can trigger extra beats or an irregular rhythm, mainly in people with heart disease or after alcohol or a cold plunge.
- →PracticesTabata TrainingCertaintyLowSourceReference knowledge1 other source
Tabata can trigger atrial fibrillation or ventricular ectopy in susceptible individuals, associated with an extreme sympathetic surge.
Open Tabata TrainingStudy result
Tabata can trigger atrial fibrillation or ventricular ectopy in susceptible individuals due to extreme sympathetic surge.
- →SupplementsTurkey TailCertaintyLowSourceAnecdotal1 other source
This effect was mentioned in 2 of 232 Reddit reports discussing it.
How to read the evidence
Evidence tier — overall strength of the evidence for the whole compound
- StrongWell established — backed by strong, consistent human research.
- ModerateSome genuine support, but mostly from small or lower-quality studies. Promising, not proven.
- PreliminaryEarly-stage evidence — a promising hypothesis, not an established effect yet.
- LimitedVery limited evidence — treat this as a hypothesis, not proof.
- InsufficientNot enough good evidence to draw conclusions yet.
Certainty — how sure we can be that the effect is real
- Very highVery sure — strong, consistent evidence
- HighFairly sure — consistent evidence from good studies
- MediumModerately sure — new studies could change this
- LowNot sure — little or mixed evidence
- Very lowVery unsure — almost no usable evidence
Source — where the data comes from
- Meta-analysisPooled analysis of many trials — the strongest evidence
- RCTRandomized controlled trial — a strong human study design
- ClinicalA human clinical study
- Reference knowledgeFrom general health-science or pharmacology references, not a study of this exact claim
- Animal researchStudied in animals, not humans
- Community reportsAggregated user reports — anecdotal signal, not evidence
- TheoreticalMechanism-based reasoning, not yet tested
Study grade — quality of each underlying study (A best, D weakest)
- AHigh-quality — strong, consistent human trials
- BGood — solid evidence with some limitations
- CModerate — limited, small, or mixed-quality studies
- DWeak — preliminary, indirect, or animal-only
Confidence — how strongly the sources back a finding
A 0–100 score from study quality and agreement
Most supplement evidence is graded C–D. Read it as preliminary signal, not proof.
Full write-up
What is it
Heart Rhythm Disturbance is an unwanted health outcome involving the heartbeat or the heart’s electrical conduction. A person may notice palpitations, while other disturbances may be identified through abnormal conduction patterns rather than a sensation. It describes an irregularity in cardiac rhythm or signaling, not a general measure of cardiovascular health or fitness.
How interventions help
For Heart Rhythm Disturbance, the interventions represented here are potential contributors rather than treatments that improve or correct the condition. The reported changes range from palpitations and irregular beats to disturbances involving atrial, ventricular, or atrioventricular rhythm, so “heart rhythm disturbance” covers several different patterns rather than one uniform response.
One recurring theme is disruption of the factors involved in cardiac electrical conduction. Both excess potassium and severe potassium depletion are described as capable of producing rhythm or conduction abnormalities, showing that electrolyte imbalance can be relevant in opposite directions. Other substances have been associated with changes such as slowed conduction, irregular heartbeat, or arrhythmia, but the findings do not establish a single shared effect or that these responses occur consistently.
Context also matters. Rhythm changes have been reported in settings involving exercise, cold-water immersion, or hot yoga, while other findings come from supplement or medication-related exposure. Some observations were made in healthy people, some in people with a clinical condition, and many did not specify health status; therefore, the findings should not automatically be generalized to every person or every use pattern.
No dose, duration, onset, or persistence after stopping is provided here. The available findings therefore describe reported associations and events, not a timetable for when rhythm changes begin or whether they resolve after an intervention is stopped.
Choosing guidance
The listed options do not support a single rule about amount or duration. Some rhythm concerns are associated with high intake, high-dose therapy, high exposure, chronic or excessive use, or electrolyte changes, while others were observed around exertion, cold-water immersion, breath-holding, or other acute circumstances. Because comparable doses and exposure periods are not provided, these options cannot be meaningfully compared by how much is needed or how quickly an effect may appear.
The evidence also differs in what it can establish. Clinical studies provide a different basis for interpretation than pharmacology references, reviews, case evidence, or anecdotal reports. A case report or an anecdotal report can signal a possible concern but cannot show how commonly it occurs or establish that the option caused the rhythm disturbance. Findings based on pharmacology references may describe a plausible or documented risk without showing how often it occurs in routine use.
Applicability is limited for many options because health status is not specified. The entries involving healthy participants, people with a clinical condition, or mixed groups may not apply equally to someone with a known heart rhythm problem. Several possible pathways span the options, including electrolyte depletion or excess, caffeine exposure, altered calcium or potassium balance, and autonomic or exertional stress. These distinctions matter more than treating all listed options as equivalent, particularly when the evidence is limited or comes from a specific exposure context.