Reply To: Losing weight on Shabbos Home › Forums › Shabbos! › Losing weight on Shabbos › Reply To: Losing weight on Shabbos June 18, 2015 4:05 pm at 4:05 pm #1087304 MDGParticipant ” You gain it Motzai Shabbos NOT on shabbos.” That’s because you can’t use a scale on Shabbat, but you can weigh yourself after.