Before dusk set in , some of us started preparing the dinner . We had a hearty meal loaded with sinigang na baboy , grilled liempo , grilled hotdogs , and grilled eggplant . Before heading off to bed , some still went to swim while others continued their videoke marathon , and others started their booze escapade . And right before dawn , everyone finally got into their goodnight sleep . Day 2 .
According to the above context, answer the following question.
What may be the reason some went off to swim ?


They wanted to exercise before going to bed .