There is something to be learned from this, but I am hesitant to post it as the last time I gave advice, certain people jumped all over me for doing so.
In spite of this, here is the advice:
1. NEVER exercise if you have a fever or if you have a cold.
2. If you choose to use "additives," you would be well advised to have your heart checked to ensure you have no congenital/genetic related ventricular hypertrophy or any other underlying illness of the heart.
3. If you don´t use "additives," it is in anycase advisable to have a regular checkup if you are involved in any kind of regular and intense sport. Sudden heart attacks can happen at almost any intensity and, more often than not, there are underlying abnormalities of the heart which in many cases can be determined by a thorough check-up.
Most cases of sudden heart attacks are due to hypertrophic cardiomyopathies, coronary artery blockages and myo-/ or pericarditis, which is a swelling of the sac surrounding the heart due to an infection or fever. Then there are the congenital causes, valve abnormalities and arrhythmias. These can almost always be determined by a cardiologist.
I have some articles, if anyone is interested which are too large to post. Just pm me.
Age-related cardiovascular causes of sudden
death during sports activity.
Young competitive athletes (age ≤ 35 years)
• Hypertrophic cardiomyopathy
• Arrhythmogenic right ventricular cardiomyopathy
• Congenital anomalies of coronary arteries
• Myocarditis
• Aortic rupture
• Valvular disease
• Preexcitation syndromes and conduction diseases
• Ion channel disease
• Congenital heart disease, operated or unoperated
Adults (age > 35 years)
• Atherosclerotic coronary artery disease