If you see in sports at a super high level, people get hurt or have injuries when there isn't that pleasure, the true pleasure of the sport, when they're tired or demoralized or they're not quite focused.
We shouldn't force ourselves to do something that really is just painful to us. If there is a discrepancy between what we are doing or putting our bodies through and then what our minds are telling us, you really have to look at yourself, and the most essential part of it is the pleasure aspect.