rear delt builder with your chest on a pad and the handles sweeping back
the pad takes the hinge out of it, so your erectors stop being what tires
first and the rear delt can be pushed much further
the machine spreads resistance across the arc instead of stacking it at the
finish the way a dumbbell reverse fly does
Execution
Sit facing the pec deck with your chest against the pad and take the handles
with your arms extended in front of you, palms facing in.
sweep the handles out and back, leading with your elbows
stop when your arms reach roughly in line with your shoulders
let them travel back forward under control
keep your chest against the pad throughout
Set the seat height once and keep it. If you change it, pick Changed technique
or equipment in the exercise menu, so the jump doesn't count as a strength
change.