Not everything is as it seems in relationships—especially when it comes to conflict.

For a long time, runners have relied on the 10-percent rule that cautions against increasing weekly mileage by more than 10 percent each week to avoid running-related injuries. While this method ...

According to the “90-10” rule of conflict, only 10 percent of fights stem from the immediate problem, while 90 percent are driven by deeper emotions—unmet needs, past wounds, and unspoken fears.