Exercises such as this one are good for people who are short on time or would like to keep their core active.
Find more combination exercises here:
http://askthetrainer.com/combination-exercises-videos.html
Remember that your intensity is important and doing dumbbell rows with far less weight than you're capable of doing may be counter productive.
Read about building Muscle.
http://AskTheTrainer.com/muscle-building.html
