Weight training: How much is enough?

You don't have to be in the weight room for 90 minutes a day to see results. For most people, short weight training sessions a couple of times a week are more practical than are extended daily workouts.

You can see significant improvement in your strength with just two or three 20- or 30-minute weight training sessions a week. That frequency also meets activity recommendations for healthy adults.

The Department of Health and Human Services recommends incorporating strength training exercises of all the major muscle groups into a fitness routine at least two times a week.