MedPark Experts Warn Against Overtraining Dangers at Sustainability Expo

At the Sustainability Expo 2026 (SX2026) on November 6, 2026, MedPark Hospital held a seminar titled "How Hard Is Too Hard," questioning how much exercise is too much while providing knowledge on observing the body's warning signals and preparing for high-intensity sports competitions. Dr. Alisara Areeratchakarn, a sports medicine and orthopedic specialist, and Dr. Sanisara Chanthachumnum, a cardiology expert, shared their expertise.

Dr. Alisara explained that HYROX is a competition combining 1-kilometer runs alternating with eight functional exercise stations performed continuously, each engaging multiple muscle groups such as Ski Erg, Sled Push, and Farmer's Carry. Competitors therefore need both muscular strength and endurance.

The concern is that this competition format has very limited rest periods. Athletes must exert continuous effort, and as fatigue sets in, they may lose proper form. Force that should go to muscles may instead transfer to joints, bones, and tendons, increasing injury risk — especially for those who haven't prepared adequately.

Dr. Sanisara noted that HYROX qualifies as high-intensity exercise because it heavily demands both the cardiovascular system and muscles. During competition, many push for faster times and refuse to ease up even when their body signals excessive fatigue.

Doctors advise that before competing, one shouldn't assess readiness based solely on regular exercise habits or feeling strong. Health screening and risk evaluation should come first.

Regarding cardiac risk, Dr. Sanisara explained that intense exercise triggers adrenaline surges, raising heart rate and blood pressure. If a competitor has hidden heart disease or abnormalities, this can provoke arrhythmia, fainting, or acute coronary syndrome — where heart muscle is deprived of blood and can become life-threatening.

Worryingly, cardiac abnormalities aren't limited to older adults. Young, seemingly healthy people with no prior symptoms may harbor hidden conditions such as arrhythmias, coronary artery anomalies, or hypertrophic cardiomyopathy.

Danger signs that must not be ignored include chest tightness — especially during exertion — dizziness, palpitations, blurred vision or near-fainting, and abnormal shortness of breath. If these occur, stop exercising immediately, do not push through, and seek medical evaluation.

For those with risk factors like hypertension, diabetes, high cholesterol, obesity, smoking, or family heart history, health assessment before competition is crucial. Particularly for those over 35, annual check-ups are recommended, where doctors may perform physical exams, ECGs, and additional tests such as echocardiograms or treadmill stress tests as appropriate.

Beyond heart concerns, excessive exercise also risks muscle, bone, and joint injuries. Dr. Alisara noted these can range from muscle tears to herniated discs in joints.