If you look at the first column in the table below, you will find the number of reported hours spent relaxing per typical work day for a survey respondent. Then, the following three columns are the respondent's reported levels of happiness, with "1" corresponding to "Very Happy", "2" corresponding to "Pretty Happy," and "3" corresponding to "Not Too Happy."
The people who are relaxing 0 hours a day, myself included, are by and large reporting themselves as being "Pretty Happy."
The happiest people? Around 40% of the "Very" happiest people report having three to four hours of relaxation per typical work day. But then again, look at the "Very Unhappy" people in column 4: they majority of them relax two to five hours a day, too!!
So happy people and unhappy people alike seem to relax. It doesn't have much of a relationship to happiness, whatever the yoga studios are telling us.