It's not like you work 14 hours per day, 4 days a week. In my district right now, nobody does more than 2 per week.
In a store that's open 8-10 week days and 9-6 weekends, it's not hard to work it out. If you work 44 hours per week x 2 weeks its 88 hours. Take away 18 hours for weekends and you get 70 hours. So if you want to do 14's you would only work 5 of the 10 week days. So basically out of 14 days, you would work 7 out of 14 days, That gives you plenty of free time to recover or play hard or do whatever. You could also agree to take less days off and split some days with your partner, trading off so you limit the 14's and add more 7's.
Week One: (51 hours)
- Sun: Off
- Mon: 8-10
- Tue: off
- Wed: 8-10
- Thur: off
- Fri: 8-10
- Sat: 9-6
Week Two: (34 hours)
- Sun: 9-6
- Mon: off
- Tue: 8-10
- Wed: off
- Thur: 8-10
- Fri: Off
- Sat Off
If you think that's a bad schedule, so be it. You have 2 three day weekends a month, you don't work more than one 8-10 in a row. The most you work is 3 days in a row. You have 10 week days off per month.