For rear-delt growth
For rear-delt growth, cable rear delt fly rates higher on our research criteria: more of the work on the rear delts.
Both are good choices that train the rear delts the same way, so they swap freely. Rotating between them every few weeks is an easy way to vary your training.
The research score comes from these, scored by hand from the studies. Lifter scores appear once an exercise has 10 ratings. How scores work
Cable Rear Delt Fly. Cables keep the rear delts loaded across the whole arc, with little else able to take over.
Rear Delt Row. Rowing with the elbows flared targets the rear delts, though the upper back shares the work.
For rear-delt growth, cable rear delt fly rates higher on our research criteria: more of the work on the rear delts. Both are good choices that train the rear delts the same way, so they swap freely. Rotating between them every few weeks is an easy way to vary your training.
About the same: both are easy to learn.
Cable rear delt fly needs a cable station, so for most people it’s a gym exercise. Rear delt row needs dumbbells and a bench, so a home gym covers it.
About the same: both rate Excellent for joint and recovery cost in our research rubric.