"Declare" loop creates output for only one of the variables

Question

I have written a script to create a loop for a software I'm running:

#!/bin/bash

declare -a pops=("pop1" "pop2" "pop3")

for target in "${pops[@]}";
do
while IFS= read target
do
    parFile=./input/paramfile.1b.$target.txt
    sed "s/PROPIND/0/g; s/BOOTSTRAP/1/g; s/NULLIND/1/g; s/OUTPUT/globetrotter.1/g; s/TARGET/$target/g" ./input/paramfile.txt > $parFile
name=globetrotter.1b.$target
R < myscript.R ./input/paramfile.1a.$target.txt ./input/samplefile.txt ./input/recomfile.txt 1 --save > ./output/log.$name
    break
done
done

The program runs just for the first population and then it stops. For this reason I believe the loop is not written correctly. Is the break in the wrong spot?

Thank you.