The Takeaway. Muscle doesn't weigh more than fat, but it is more dense. That means it takes up less space in the body than fat does, giving you a leaner look. Muscle offers more health benefits than body fat, including a faster metabolism, improved strength, and better blood sugar control.
Yes, if muscle mass increases, your weight will generally increase as well. Muscle tissue is denser than fat tissue, so even small increases in muscle mass can lead to a noticeable increase in weight.
Muscle tissue is denser than fat, which means that even if you have a higher weight, you may still look leaner because muscle takes up less space (1). So, if you have a higher muscle mass, it can contribute to a heavier weight without necessarily looking fat.
Let's quickly get past an odd question that sometimes pops up. Maybe you've heard this one: “Which weighs more, a pound of muscle or a pound of fat?” Short answer: They weigh the same (a pound is a pound!).
In general, weight gain from fat will result in a softer appearance, while weight gain from muscle will leave you looking leaner and feeling stronger. The most accurate way to assess any change in your body composition is through body composition testing.
Most beginners will see noticeable muscle growth within eight weeks, while more experienced lifters will see changes in three to four weeks. Most individuals gain one to two pounds of lean muscle per month with the right strength training and nutrition plan.
While it's a myth that muscle weighs more than fat—after all, a pound is a pound—it is denser, which means it takes up less space in the body. This may explain why you look slimmer but the scale hasn't budged. Water weight could also be a factor, according to strength and conditioning coach Brandon Mentore.
According to BMI standards, underweight is considered under 18.5, normal weight is 18.5 to 25, overweight is 25 to 30 and obese is over 30. However, BMI doesn't distinguish between muscle and fat and, thus, can be skewed, especially because muscle weighs more than fat.
There are several research-backed reasons why you might notice a slight weight gain after exercise. These include muscle gain, water retention, post-workout inflammation, supplement use, or even undigested food. In most cases, post-workout weight gain is temporary.
Your weight is a balancing act, but the equation is simple. If you eat more calories than you burn, you gain weight. And if you eat fewer calories and burn more calories through physical activity, you lose weight. In the past, research found about 3,500 calories of energy equaled about 1 pound (0.45 kilogram) of fat.
Muscle weighs more than body fat
This means that muscle and fat may look the same on the scale, but they'll look different on your body. While your clothes may feel looser, the scale may tell you otherwise. Count this as a win.
The volunteers reduced their waist sizes by an average of 1 inch for every 4lb (1.81kg) they lost. So if you lose 1lb (0.45kg) a week you could hope to reduce your waistline by an inch after four weeks.
If you're asking yourself, “Why am I gaining weight when I barely eat,” several factors may be at play. Your body may be holding onto fat stores if your eating habits are inconsistent or restricted. Or, your weight gain may be the effect of a sedentary lifestyle, medical condition, or long-term stress.
Normal ranges for muscle mass are: Ages 20-39: 75-89 percent for men, 63-75.5 percent for women. Ages 40-59: 73-86 percent for men, 62-73.5 percent for women. ages 60-79: 70-84 percent for men, 60-72.5 percent for women.
Use your scale every morning after you empty your bladder (and before you eat or drink anything), wearing as little clothing as possible. Because you lose water weight overnight, you'll get a lower number, too. Place your scale on a hard, even surface—no carpeting.
Muscle is denser (meaning a lot less fluffy) than fat, says Dr. Calabrese. Put another way, 10 pounds of muscle takes up a lot less space than 10 pounds of fat. So, as you start working out regularly and building strength, the new muscle you build may eventually weigh more than the fat you've burnt off.
Although exercise is extremely healthy, too much can actually be a stress on the body. Overtraining happens when you go too hard, too often, or don't take time to recover. This can increase inflammation as well as the stress hormone cortisol. Cortisol can lead to fatigue and weight gain, especially around your belly.
If you're wondering about weight gain from sleeping post-exercise, rest assured that sleep is a crucial part of recovery and does not directly lead to weight gain. Getting adequate sleep is essential to a healthy lifestyle and can contribute to overall well-being, including weight management.
“Muscle tissue is denser than fat tissue, so it takes up less space,” says Barron. “This is exactly why your weight may not change, but your clothes are feeling looser.” This is one of those situations where you should keep doing exactly what you're doing.
A few people have high BMIs but don't have much body fat. Their muscle tissue pushes up their weight. Kahan points to very muscular people, like football players or body builders. “Their BMI shows up pretty high, and yet their body fat is actually pretty low," Kahan says.
The Scale is Going Up
The first sign that you're building muscle may be an increase in body weight. The number on the scale goes up because muscle tissue is denser and heavier than fat. Therefore, it takes up less space for the same amount of weight.
Muscle is denser than fat, meaning a kilogram of muscle takes up less space in your body than a kilogram of fat. So, even if you gain muscle and your weight on the scale increases slightly, you can appear slimmer and more toned.
How Long Does Water Weight Last? The span can vary depending on the cause. Temporary water weight caused by high sodium intake or premenstrual syndrome can last a few days to a week. Permanent water weight caused by underlying health conditions may last longer and require medical treatment.
The Average Adult Has this Much Muscle
In other words, an average male weighing 185 pounds has about 78 pounds of lean muscle tissue while a female weighing 140 pounds has approximately 49 pounds of lean muscle tissue (note: this is not an “exact” number).