It is so great to see more responses.
50% of 1RM, 15-20 reps, lift it up as fast as you can. I would consider this also trains power. The point is the speed. I probably recommend different programs for power. Running stairs can also train power and lactate buffering capacity if intermittent program is used. I am not a swimmer and have not worked with swimmers. However, I think if the competing time is less than 2 minutes, I think it is more close to power exercise. some swimming events could last for more than 5 minutes, such as 800 m. I don't really know the good time for the elite athletes. But for sure, depending on the events, swimming races can be either aerobic or anaerobic.
However, since i am not a swimmer (i can swim, just not a competitor), I think swimming relies on more force generation from either upper or lower body depending on the events. please correct me if i am wrong. from this point, probably weight training needs to focus more on power.