24 Fitness Myths to Debunk for Your Next Workout


View as:

two people giving high-five while jogging in group outside
Photo credit: skynesher/istockphoto

The pursuit of physical perfection (or simply good health) is fraught with half-truths, myths and urban legends. We asked personal trainers from around the country to weigh in on some of the biggest fitness myths out there. Find out which fitness fads and myths to ignore, and which beneficial workout habits you should be focusing on instead.
woman lifting weight with personal trainer
Photo credit: Ridofranz/istockphoto

Lifting weights, even heavy ones, won't turn anyone into the Incredible Hulk. Celebrity fitness trainer Tadeo, who has trained Kerry Washington and Jesse Metcalfe, says bulking up would take monumental effort. "To gain that much mass naturally, you would you need to lift extremely heavy weights, combined with an excessive increase in calories," said Tadeo. "Lifting weights will actually have you looking more fit and compact than working out without weights."
group of friends lifting weights together in gym
Photo credit: nd3000/istockphoto

We've all heard that not exercising results in muscle turning to fat. There's no truth to this idea, says Robert S. Herbst, a personal trainer and 19-time world champion powerlifter. "Muscle can't turn to fat," says Herbst. "Muscle is made of protein. And fat is made of lipids. Chemically, one can't turn into the other." The reality is that if one doesn't use muscle, it simply atrophies.
woman jogging in the morning
Photo credit: bogdankosanovic/istockphoto

There is no right or wrong time of day to exercise, says physical therapist Karena Wu, owner of ActiveCare Physical Therapy. "Working out, period, is the best. It does not matter at what time you get your workout in -- it just matters that you get it in," says Wu.
two people at gym working out on elliptical
Photo credit: xavierarnau/istockphoto

When it comes to workouts, efficiency trumps the length of the workout, says NASM-certified personal trainer and health coach Robyn Lanci. "You can get a great workout in less than an hour," she explained. "The best, most efficient workouts work multiple muscle groups at once. Those are called compound movements. Some examples of compound movements are squats, lunges, rowing exercises, and pushing exercises."
woman at home doing crunches
Photo credit: Antonio_Diaz/istockphoto

Doing endless abs work in pursuit of a six-pack will not lead to success. "Unfortunately, the abs class at the gym is not the secret to a great summer six pack," says trainer Tadeo. "In reality, that time would be better spent on some resistance training or cardio. Add some quality weight lifting and running, and you will get your desired results."
class working out in gym
Photo credit: PeopleImages/istockphoto

A longer workout doesn't necessarily benefit you, says physical therapist Karena Wu. "You can work out for a longer period of time, but not end up accomplishing as much as you would have during a shorter period of time," she explains. "Why? Because you might be resting too long in between sets or not increasing your intensity as much." The bottom line -- short workouts are often more effective if you ramp up the intensity and push your system.
woman outdoors running barefoot
Photo credit: Pavliha/istockphoto

Remember those barefoot-like shoes that came out a few years ago? Their popularity was based on the idea that running barefoot running was more natural and could reduce injuries, says Ruggero Loda, a running shoe expert. "This idea has been debunked by science, and in 2014 Vibram, the company that used those claims to market their FiveFingers line of running shoes, lost a class action lawsuit," says Loda.
middle-aged man eating junk food at gym
Photo credit: TerryJ/istockphoto

Nutrition is actually more important than your fitness regimen. "When you're seeking to make positive changes, nutrition is 80 percent of it and exercise is 20 percent," says health coach Robyn Lanci. Still, that should not discourage you from working out, says Lanci. Those workouts help build stamina, endurance, mobility, and overall strength, in addition to weight loss.
two people in gym doing squats
Photo credit: AzmanJaka/istockphoto

For those aspiring to have a booty like Kim Kardashian, squats are not the answer. Instead, says trainer Tadeo, the secret is a variety of exercises. "The butt is a very complex muscle group and the simple motion of a squat isn't the reason people have that sought-after peach shape," he explains. "The secret is actually a combination of squats, leg press, dumbbells, and movement patterns."
middle-aged woman exercising at the gym with a personal trainer
Photo credit: andresr/istockphoto

Few people realize we lose a pound of muscle every year after age 30, according to physical therapist Karena Wu. This cellular breakdown of muscle tissue is a natural part of aging, called sarcopenia. Often people stop lifting heavier weights as they age because they think their bodies are not strong enough. But resistance training promotes bone growth and circulation in the body. "Don't be afraid to pump some iron when you're older. Just make sure you are conditioned appropriately to do so," says Wu.
sweaty middle-aged male jogger
Photo credit: Ridofranz/istockphoto

Perspiration is part of our body's cooling system, but it does not correlate with caloric expenditures, says Cary Raffle, a New York City-based personal trainer and a certified orthopedic exercise specialist. Need proof? "Stand outside on a very humid 90-degree day, and you will sweat profusely," she says. "Run indoors in a very dry, 65 degree environment, and you may hardly break a sweat."
group of people at the gym in a suspension training class
Photo credit: andresr/istockphoto

Every time you work out, you create micro-tears in the muscles. After a workout, the soft tissues accumulate lactic acid, which can create soreness. By with a day off in between exercising, the body can repair. "This time period is when you actually build strength in the tissues," says physical therapist Karena Wu. "If you keep working out the same muscles every day, the body never gets a chance to fully heal and get stronger, and this can potentially cause injury."
sports shoes and coconut water
Photo credit: CatLane/istockphoto

There has been a lot of hype surrounding coconut water, but dietician Amy Goodson says all the buzz is unjustified. "The point of a sports drink is to provide carbohydrate, sodium and potassium," says Goodson. "Coconut water is very low in potassium, and while it may be a fine hydrator for the everyday exerciser who is not training very hard, it is not the best choice for athletes or weekend warriors training hours a day in the heat and humidity."
fitness group stretching outside
Photo credit: FatCamera/istockphoto

Stretching is an integral part of a well-balanced exercise regimen. "Regular stretching maintains the optimal resting length of the soft tissue, allowing for better neuromuscular activation, better performance, and avoidance of injuries," physical therapist Karena Wu explains. "It also reduces the compression in the joints."
muscular woman sweating from work out in home gym
Photo credit: rez-art/istockphoto

The idea that an impressive six pack means you have a strong core isn't necessarily true, says personal trainer Cary Raffle. There are 29 muscles that make up your core, and many of them are not abdominal muscles. "A strong core is really about the ability of these muscles to work together, a process of neuromuscular coordination," he explains. "Think of the muscles as a 29-piece orchestra. Your brain is the conductor, and your central nervous system is the conductor's baton signaling each muscle."
man doing crunches outside
Photo credit: Nastasic/istockphoto

Crunches and sit-ups work only on the most external abdominal core muscles, primarily the rectus abdominis (otherwise known as the six-pack muscle) and the external obliques, says personal trainer Cary Raffle. That means you're missing entirely important inner core muscles. "In cases of low back pain, core strengthening is very important, but crunches may be the wrong exercise and actually make the problem worse," he says.
group doing sit ups on an exercise ball
Photo credit: FatCamera/istockphoto

"One cannot spot reduce," personal trainer Robert S. Herbst says. "The only way to lose belly fat is to reduce overall body fat." The best way to do that is with exercises such as weight lifting or high-intensity interval training (HIIT), which raises metabolism. "Doing a zillion crunches will only work to the extent that they burn some calories, but an overall body weight routine is best."
closeup of man setting exercise machine in gym
Photo credit: SeventyFour/istockphoto

Don't base your workouts on burning a certain number of calories, says Sophia Borghese, consultant for New Orleans-based All Inclusive Health. "Those calorie trackers on the treadmill might not always be accurate, and focusing on a number takes away from the pleasures of exercise," she says. "Being in shape is not a measure of how quickly you can burn 1,000 calories. It's a measure of how easily you can work hard."
woman stretching before a run
Photo credit: RyanJLane/istockphoto

Stretching prior to running seems like a good idea, but running shoe expert Ruggero Loda says to pass. "Static stretching before running, or any activity that requires power, strength and explosive muscular performance actually hinders running performance," he says. "Stretching should be left for either after workouts or at times different from your workout time."
man drinking protein drink while sitting on bench in gym
Photo credit: GoodLifeStudio/istockphoto

While there are many benefits to having protein after a workout, bulking up isn't necessarily one of them, says Amy Goodson, a Dallas, Texas registered dietician and nutrition consultant. While protein after a workout is critical to help your body recover, "Protein also plays a variety of other roles in the body," she says. Bulking up simply requires added calories in your diet, not a specific kind.
woman running outside in city
Photo credit: bogdankosanovic/istockphoto

Most people can only maintain exercising at their maximum heart rate for a few minutes, says Cherie Miner, a sports medicine physician at Andrews Sports Medicine and Orthopedic Center in Alabama. "Performance will be greatly affected if people try to push longer than that at their max rate," she says. Maximum heart rate workouts should be done carefully, because prolonged, high-intensity workouts can cause serious injury and exhaustion.
eating six peas on plate
Photo credit: menonsstocks/istockphoto

Fasting before cardio isn't a good idea, according to dietician Amy Goodson. "When you workout with no food in your system, your body typically looks to intramuscular triglyceride (fat stores in the muscle) and glycogen (stored carbohydrate) for fuel," she explains. "If the workout is long, it is likely to use some amino acids from lean muscle as well, in order to fuel the workout." In fact, having some food before a workout will give you more energy and help you move faster and get stronger, resulting in more calories burned over time.
young female runner checking her pulse
Photo credit: Youngoldman/istockphoto

Many people believe they can calculate their maximum heart rate for exercise by subtracting 220 minus their age. Sports medicine doctor Cherie Miner says that may be a good starting point, but there are actually many factors that affect a person's max heart rate. "Some factors include a person's physical fitness level, stress and fatigue level, and other external factors such as weather and temperature," she says. To determine your max, talk to your doctor.
tired athletic man looking down after intensive fitness workout
Photo credit: Bojan89/istockphoto

Soreness, especially that lingering sensation you feel for days, is not necessarily the sign of a great workout, notes personal trainer Cary Raffles. "It's actually a sign that your body is adapting to new stimulus," he says. If you continue with a similar exercise program at similar intensity, the aching will likely not return. But the fact that you are no longer experiencing it is by no means a sign that the workouts are not beneficial.

Cheapism.com participates in affiliate marketing programs, which means we may earn a commission if you choose to purchase a product through a link on our site. This helps support our work and does not influence editorial content.