One of the areas I seldom - if ever - get DOMS is in the pecs.
But around June last year I was watching some MMA fight training and saw one particular movement that intrigued me.
I call them Lying Side-On Dumbbell Reaches in my workout
. I still don't know what the proper name is, but will describe it:
Lie in a side-on plank position, propped on one elbow and rigid.
Hold a dumbbell in the free hand.
The movement begins with the dumbbell held in the crook of the supporting arm.
Now raise the DB in an arc outwards, away from the body, until the arm is straight and the DB directly above your head.
Hold briefly, lower following the same arc, and repeat.
This KILLED my pecs, for days afterwards, especially on the inside (which is even more rare). Thoroughly recommend them.