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Home / Exercises / Weightlifting Makes You Bulky, and 5 Other Myths You Should Ignor…

Weightlifting Makes You Bulky, and 5 Other Myths You Should Ignor…

What do Dwayne “The Rock” Johnson, “The Mountain” from Game of Thrones, and Arnold Schwarzenegger (circa 1975) have in common? They all built brick house bodies thanks to a little thing called weightlifting. But they also pursued it with the express purpose of maxing out their muscular potential. Bulking up isn’t easy, despite what some weightlifting myths might have you believe. It takes a lot more than squatting a barbell, bench pressing some dumbbells, or swinging a kettlebell a few times to sculpt a Mr. or Mrs. Olympia body. Still, the fear of bulking up simply by touching a weight keeps many people (especially women) from making strength training a mainstay of their fitness routine. Here’s a look at why this fear of bulking up shouldn’t deter anyone from weight training, and why the benefits of lifting weights outweigh any of the largely unfounded drawbacks.

Why Do People Think Weightlifting Makes You Bulky?

The weightlifting myth that suggests weight training makes you bulky is steeped in history. Magazines, movies, and the media in general have long hailed weightlifting as a big man’s game, the singular goal of which is getting swol.

“I have a penchant for collecting vintage weightlifting magazines that date back to the 1930s, and the covers all feature big, brawny guys,” says K. Aleisha Fetters, M.S., C.S.C.S. in Chicago.

Despite this one-sided portrayal of the effects of weightlifting, exercise experts, personal trainers, and coaches work tirelessly to boast the benefits of lifting weights as an efficient and effective method for getting in shape — regardless of whether that shape is big and muscular or slim and defined. But because the meatier of the masses tend to spend a lot of time training in the weight room, people continue to associate pumping iron with bulk and brawn.

Breaking Down the Bulk Myth

Many people — usually women — who are afraid of bulking up typically don’t understand the complexity of building muscle, Fetters says. So let’s break down the science to debunk this weightlifting myth:

Strength training leads to micro-tears in muscle fibers. Your body responds by repairing the muscle tissue, increasing the size of cells, and adding new ones. Although every body pretty much generates muscle the same way, there are many factors that play into how much growth occurs and the ultimate size and shape of muscles. Gender, hormone levels, age, and nutrition all add variation to the muscle-building paradigm. Other important factors that play into muscle growth are:

  • How often you lift
  • How often you train each muscle group
  • How many exercises you do in each workout
  • How much you rest take between sets
  • How much protein you eat
  • How much you sleep

…and that’s just to name a few. Because of the many factors that go into building muscle, women won’t just “accidentally” turn into linebackers if they lift heavy weights. In fact, most women can’t “bulk up” even if they wanted to. “It’s just not in their genetic cards,” says Thieme. For starters, women tend to have lower levels of muscle-building testosterone than men. Add to that the fact that women also tend to have less skeletal muscle mass, and it becomes clear that they just aren’t predisposed to build the same kind of mass as men are. But that doesn’t mean that lifting weights is worthless for them. “Research shows that while most women can’t build as much muscle as most men, they can enjoy similar strength gains,” says Thieme. In short, they can enjoy all the benefits without the bulk.

Other Weightlifting Myths to Dismiss

Still wary about weightlifting despite the busted bulk myth? Let’s squash some other misconceptions about strength training, and dive into some of the great benefits of lifting weights.

Myth 1: Calories burned lifting weights is less than cardio.

Truth: You might burn more calories during an hour long run than you will during a similarly long weightlifting workout, but your total caloric burn from the latter will be much higher. The reason is something called “excess post-exercise oxygen consumption,” or EPOC.

EPOC is the increased rate of oxygen consumption that occurs as your body recovers from the workout. “The greatest EPOC values are seen after HIIT, but weightlifting is a close second,” Thieme says. “Both trigger greater EPOC values than steady state cardio [like distance running or cycling] because the recovery process is longer and more involved.”

So even if steady state cardio and weight training workouts are done at the same intensity, when you call quits on the cardio, your body typically stops burning calories soon afterwards—typically within a few hours. But your calorie burn can remain elevated for more than 48 hours after you finish lifting weights.

Myth 2: Weightlifting makes you less flexible.

Truth: When people think about people who lift weights, they often think of stiff, inflexible bodybuilders. But here’s the thing: when a weightlifting program is done correctly, it can actually enhance mobility, not reduce it.

The weightlifting myth about bulking is partially to blame for this misconception. Common sense might suggest that the more muscle you have, the more it will get in the way of movement, and the more limited your range of motion will be. But gymnasts are the perfect example of how you can be both muscular and flexible. “Pound for pound, gymnasts are among the strongest and most muscular athletes in the world,” Thieme says. “But they’re also among the most limber and mobile.”

How do they enjoy what many people incorrectly believe are mutually exclusive skills (i.e., extreme strength and near perfect mobility)? “Every movement they make—whether they’re training or competing—is done through a complete range of motion,” says Thieme. “That is how you become mobile and muscular.”

Weightlifting Myths

Myth 3: You have to go to the gym if you want to do a weightlifting program.

Truth: “You don’t need a fully-stocked gym to get started with weightlifting,” says Trevor Thieme, C.S.C.S. and Beachbody’s senior manager of fitness and nutrition content. “All you need are a few sets of dumbbells that challenge you, and about six square feet of floor space.” If you have a bench and/or a stability ball, all the better, but neither one is required.

“With a few basic pieces of equipment and a smart weightlifting program, such as Body Beast or The Master’s Hammer and Chisel on Beachbody on Demand, you can lift weights and build strength and power in the comfort of your own home,” Thieme says.

Myth 4: Weight machines are better than free weights.

Truth: While weight machines might seem less intimidating than free weights, they’re less effective for building muscle. “And the reasons are that they tend to lock you into an unnatural movement pattern, and they don’t always engage muscles the same way as equivalent free weight exercises do,” says Thieme.

Take the Smith machine, in which you move a loaded bar along a pair of vertical rails. It’s popular with strength training neophytes and solo lifters, but a recent study in the Journal of Strength and Conditioning Research found that free weights can help you build more muscle. The scientists compared the barbell back squat to the Smith machine squat, and found that the former worked more muscles. “That’s because a free weight squat is unsupported, requiring you to more fully engage the targeted muscles and use more stabilizing muscles,” Thieme says. “It also allows you to learn proper form, and lift through a range of motion that’s more natural for your unique body.”

Myth 5: To see the best results, men should lift heavy and women should lift light.

Truth: Can you feel the imagery of the vintage weightlifting magazine covers creeping back in with this myth? “We haven’t progressed as far from this image as strength coaches such as myself wish we had,” Fetter says.

The truth is that gender makes no difference when it comes to strength training. “Muscle is muscle,” Thieme says. “It doesn’t matter whether you’re a man or a woman–your muscles will react to training the same way.”

Your decision to lift heavy or light should depend on your goals, fitness level, and training experience. If you’re a beginner to weightlifting, sticking to lighter weights (or not using weights at all) is probably your best option, as that will help to you master proper form, which should always be a top priority. But if you’ve been around the weight rack a few times, you should you should focus on using heavy (i.e., challenging) weights, but also occasionally lift lighter ones.

“Incorporating both heavy weight/low rep sets and light weight/high rep sets into your training program will allow you to hammer both types of muscle fibers—type I and type II,” says Thieme. “Type II fibers, which are larger and targeted with heavy lifting and explosive movements [like jumping and sprinting], have greater growth potential, but studies show that type I “endurance” fibers, which you engage with low weight/high rep sets and sustained activity [like steady state running], can grow more than previously thought.”

In short, if you want to maximize overall muscle growth, you shouldn’t just lift heavy—you have to do some light weight/high rep work as well.

Why Weightlifting Is Worth It

With all of these weightlifting myths cleared up, you should feel ready to make a recurring date with free weights. “It’s tough to think of a reason why weightlifting isn’t worth trying,” Thieme says. “In addition to increasing strength and power, it can increase mobility, elevate metabolism, burn fat, and enhance energy levels.”

And don’t ignore the mental benefits of lifting weights and becoming stronger. “Getting your head over the pull-up bar for the first time, squatting a bar with your body weight…it’s all incredibly empowering,” Fetters says. So get started on your strength training program of choiceand get ready to watch the benefits roll in.


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