Whether it's for the beach, for co-ed sports (football, softball, baseball, etc), for relationships, or just self-image, get in the mindset that you WANT to look more athletic and toned. A strong and healthy mindset will change a workout's effectiveness.
Step2
This is a pyramid weight lifting technique. You will pick a number, typically 20, 25 or 30. Assuming you pick 25, you will do 25 repetitions (reps) of curls with each arm. Without break, you will then do 25 tricep extensions. Then, without rest, you will do another set of 20, then 15, then 10, then 5.
Step3
Pick an appropriate weight. Stronger people can use 15 pound weights, but novices should use 5 or 10 pound barbells. Place a barbell in each hand. You will do individual curls, lifting the barbell straight up. Alternate right arm and then left.
Step4
When you have completed your first set of curls, then hold the same barbells in each hand. Hold the barbells behind your head touching each other. Extend your arms straight up ahead of your head, feeling a tough burn in your triceps.
Step5
Stretch afterward! You should place your arm across your chest and hold it close. Feel a stretch in your arms, shoulders, and back.
Tips & Warnings
Make sure that you are using a comfortable weight. Lower weight and higher reps will tone you without giving you the bulk you may not want.
Make sure you stretch!
Keep adequate space around you so that you don't hit anything with your weights.