Get into pushup position holding a dumbbell in each hand, legs spread to shoulder width or slightly wider. Press hard into the ground with one dumbbell while rowing with the other. Set the dumbbell down just ahead of you and repeat on the other side. Inch your toes along with each forward movement. Try knocking out 10 repetitions on each side.
Bent Over Barbell Rows:
If you are using a barbell, don't worry, the bent over barbell row done in higher repetitions will still get your heart pumping and multiple muscle groups involved. Use a moderate weight and aim for 15-20 repetitions.