A big part is getting used to it. At the beginning I felt like throwing up after 2-3 sets of squats and fell asleep when coming home. Now I feel “fine” after 5 sets and don’t fall asleep at home.

Food can also play a role. Some people like training on empty stomachs and eating after, I like eating before.

Please no, don’t subsidize anything Java-Script. It will only make it less efficient.