For swimming
For swimming, straight-arm pulldown rates well ahead on our research criteria: more carry-over to swimming.
Band pull-apart does more to prevent injuries.
Both are good choices that build different things for swimming, so a plan can use both.
The research score comes from these, scored by hand from the studies. Lifter scores appear once an exercise has 10 ratings. How scores work
Straight-Arm Pulldown. Close to the catch-and-pull motion of freestyle.
For swimming, straight-arm pulldown rates well ahead on our research criteria: more carry-over to swimming. Band pull-apart does more to prevent injuries. Both are good choices that build different things for swimming, so a plan can use both.
About the same: both are easy to learn.
Band pull-apart needs a band, so a home gym covers it. Straight-arm pulldown needs a cable station, so for most people it’s a gym exercise.
Band pull-apart: it rates Strong for injury protection in our research rubric, against Good for straight-arm pulldown.