Some testosterone supplements can increase your muscle contraction force output by up to 24 - 30 percent. (bigwillharris.com)
The length and cross section of each muscle allowed them to calculate maximum contraction forces based on the typical strength of a modern vertebrate muscle. (scientificamerican.com)
«It could be due to abnormal electrical signal conduction throughout the heart (such as arrhythmia), or weakened contraction force of heart muscles (like cardiomyopathy), or both. (llnl.gov)