More Discussions for this daf
1. Rabah in the bathtub 2. Last Section of Agadah 3. Pose'ach Tefach
4. Rabbi Shimon and Muktzah 5. Measuring a barrel 6. Rabbah bar Rav Huna's answer on final daf
7. Ending 8. The last five lines 9. Siyum for Meseches Shabbos
10. Measuring on Shabbos
DAF DISCUSSIONS - SHABBOS 157

Levy van Leeuwen asked:

what was rabba bar rav huna sitting in a bathtub for on shabbos?

The Kollel replies:

It is Mutar to take a cold bath on Shabbos (see Shulchan Aruch 326:1).

(Furthermore, perhaps he was an "Istanis" and needed to bath in cold water.)

Be well!