Band Mid-Row Tug

Stand facing each other, loop two resistance tubes through one another so each of you holds one handle in each hand, then back away until the tubes go taut. Now both of you row at once, pulling the elbows back and squeezing the shoulder blades: each person is the other's weight stack. Start with light tubes and step closer or farther apart until the tension suits the weaker partner. The stronger one can then make it harder for themselves alone by holding a static squat while rowing, or by rowing one arm at a time. It is a rare upper-back exercise that needs no anchor point, so it works in a park or a hotel room.