Workout to tone arms

Workout At A Glance:
What you need
3- to 5-pound and 8- to 10-pound dumbbells and a mat or carpeted space

How to do it
Perform the routine 2 or 3 times a week on nonconsecutive days. Begin with a 5-minute dynamic warm-up: March in place while scissoring arms overhead (like jumping jacks). For each exercise, do 2 sets of 10 to 12 reps (or 10 on each side, if appropriate). Rest 30 seconds in between sets. Begin with the Main Move. If it's too difficult, do the Make It Easier option. Not challenging enough? Try the Make It Harder variation.

For quicker results
Do 3 sets and add 30 minutes of cardio workouts 3 to 5 days a week. (These 14 Fat-Blasting Walking Workouts are a good place to start!)

Sit-Up Pullover
Lie faceup on floor, knees bent, feet flat, and arms extended overhead with a light dumbbell in each hand. Contract abs and slowly curl up, lifting head, shoulders, and back off floor. Simultaneously bring arms forward in an arc toward knees. Hold for a second, then slowly reverse to start.

Make It Harder
Add a chest press. With upper body lifted and arms in front of you, bend elbows and lower dumbbells toward chest, then straighten arms before returning to start.

Make It Easier
Keep head on floor as you raise dumbbells in an arc and bring them down to floor so arms rest at sides. Reverse to start.

MORE: 5 Moves That Seriously Lift Your Butt

Overhead Triceps Extension
Stand with feet hip-width apart. Hold light dumbbell in right hand, arm extended straight overhead, left hand supporting right elbow (A) to prevent it from flaring out. Bend elbow, lowering dumbbell behind head (B), then press back up to start position. Do all reps, then repeat on opposite side.

Make It Harder
Use the heavier dumbbell.

Make It Easier
Hold the ends of a single dumbbell with each hand so it's horizontal to work both arms at the same time.