To Top

Training Legs to Beef Up Arms?

Q: I’ve heard that I should work my legs to help me to grow bigger arms. How can that be right?

A: Generally, at least among drug-free genetically typical bodybuilders, the body will allow only a small degree of disproportionate muscular development. For each extra muscular inch, you will usually have to build about 10 to 15 pounds of muscle throughout your physique. And to build substantial mass throughout your physique, you must train your legs effectively.

By “legs” I’m referring to the thighs—fronts and backs—but in common parlance “leg” usually refers to the thigh and the calf.

Not only do you need to work your thighs effectively in order to help build your arms, but you also need to work your back and glutes effectively. Your thigh-hip-and-back structure  alone makes up about two-thirds of your body’s total muscle mass.

What’s more, you don’t need just any training for that primary structure. You need a major mass-building approach—squats or parallel-grip deadlifts rather than leg extensions, for example. When done properly, squats and parallel-grip deadlifts work the entire thigh-and-glute structure hard, and they also work the back to a degree, whereas leg extensions work just the quads. Even so, the squats and the parallel-grip deadlifts will do much more for your quads than leg extensions will.

While it’s true that the big-name bodybuilders have done lots of leg extensions, that isn’t how they built their thigh mass. Leg extensions contributed to refining their mass, but they did very little to build it.

When you know you have leg extensions to do after squats or parallel-grip deadlifts, you’ll consciously or subconsciously save something from the big exercise for the little exercise; and if you do leg extensions first, it will undermine your ability to train hard on the big exercise. Unless you give your all to squats or parallel-grip deadlifts, however, you’re unlikely to get much, if any, growth stimulation from them.

Focus mostly on the big exercises—and just a limited number of them. Keep your training abbreviated.

Of course, you want to train your arms too—but in an abbreviated way. As your overall physique grows, so will your body’s ability to grow bigger arms, but hammering away at lots of arm work and not doing full justice to the rest of your physique is unlikely to have much effect.

—Stuart McRobert


Editor’s note: Stuart McRobert’s first byline in IRON MAN appeared in 1981. He’s the author of the new 638-page opus on bodybuilding Build Muscle, Lose Fat, Look Great, available from Home Gym Warehouse (800) 447-0008 or


You must be logged in to post a comment Login

Leave a Reply

More in Latest

  • Making The Right Decisions

    What you put into your body goes a long way to maintaining your health. By Jay Campbell and Jim Brown  ...

    Sharon OrtigasOctober 24, 2017
  • Are Macros The Key To Your Goals?

    The difference between looking good and feeling good is more than just a number. By Raphael Konforti MS, CPT   “You...

    Sharon OrtigasOctober 23, 2017
  • Abs, Now!

    The exercises and focus you need to craft the eye-popping abs you want. By Adam Clark, CPT   Summer is gone....

    Sharon OrtigasOctober 20, 2017
  • 5×5

    This isn't some math problem. It's your solution to build power and strength. By Eddie Avakoff   What attracts me to...

    Sharon OrtigasOctober 19, 2017
  • Add Power And Size To Your Shoulders

    A routine sure to bulk you up! By Heather Neff, CPT   Want bolder, stronger shoulders with better definition? You came...

    Sharon OrtigasOctober 18, 2017
  • 5 Step Guide To Successful Time Management!

    These tips will ensure nothing gets in the way of succeeding with your workout goals. By Kris Gethin   In this...

    Sharon OrtigasOctober 17, 2017
  • Total Knockout!

    You already fell for Lindsay Christiansen with one simple glance. Are you man enough to dive into who she really is?...

    Sharon OrtigasOctober 16, 2017
  • 9 Reasons To Take Branched-Chain Amino Acids

    If you are serious about your physique, you'll seriously want to give this supplement a look. By Sarah Butcher   BCAA:...

    Sharon OrtigasOctober 16, 2017
  • The Spartan Chest Workout

    Add size and definition to your chest with this next level chest workout. By Raphael Konforti MS, CPT   History tells...

    Sharon OrtigasOctober 13, 2017