Although I would recommend a lower volume, higher intensity approach, the article below I recently re-read has some great info on getting the job done with quality instead of quantity. I’m glad to see articles in mainstream magazines debunking the myth that more is better.
There are many ways to grow from just 2 sets. Try each of these and see what works best for you.
Take the first set to failure:? You should not be able to complete one more rep than the set calls for.? For the second set drop the weight by 5% – 7% and try for the same number of reps.
Perform your first set with about 90% of the load you can use for the number of reps the set calls for (about 2 reps shy of failure).? Then load up your second set and take that to failure.
Take both sets to just one rep shy of failure:? This is a good safe option that minimizes risk for injury and overtraining.
Take both sets to failure:? Use this option sparingly (once or twice a month) and only if ou’ve got a year or more of training behind you.
“MF Trainer.” Mens Fitness oct. 2007:127