I know that is what most people out there think.
People start a workout like they are going to war, and the battle is against themselves.
To get results, you need the right recipe.
The proper intensity is usually not what people think.
In my long experience, results are gained with persistence and not with vomits.
Always look for a good trainer, and if you see a scream, vomit or someone feeling sick, you are in the wrong town.
Mother nature created a perfect and stable system, do not disturb it.
Should you train like a maniac to see results?