You’ll see the same routines being done every day in your gym. There are no noticeable changes in their bodies or body composition. You might be one of them. You might be one of them.

According to Phil Catudal (a renowned personal trainer from the Los Angeles area, certified by the National Academy of Sports Medicine, or NSM), the answer is yes.

“Each person’s unique genetic and physiological design determines their body type or somatotype. Different body types respond differently to certain fitness programs,” Catudal, a global coach and author of Just your Type: The Ultimate Guide for Eating and Training Right For Your Body Type, says Catudal. Full disclosure: The book contained the following tips and was written by Catudal. The women and men you see at the gym do the right exercises in the right way, but the best for another person’s body.

Catudal states that this is a standard error and can easily be corrected by correctly identifying your type — whether you are an ectomorph or a mesomorph — and then determining the best way to challenge your body with a suitable regimen. To get started, take the Body Type Quiz. These are nine more things you didn’t know about how to train for your particular body type.

There is a good chance that you need to be more accurate in your body type.

Catudal states that “very few people see themselves accurately” and estimates that about 50% of people misclassify what body type they are. Endomorphs are generally larger in bone structure, with broader shoulders and pear-shaped bodies. They may also believe that they are mesomorphs. These people have naturally muscular, athletic builds. Some ectomorphs may be endomorphs because they are slim and lean with a medium to large frame and relatively long legs.

These cases of mistaken identity are most often caused by: These cases are most common in people who have body insecurities or become too critical of their bodies. Catudal states that it is easy to fall for these traps. “The media portrays ‘body ideals’ in a variety of ways. They can be digitally altered, enhanced with special filters, or used for other manipulations. They aren’t real!

This can lead to distorted perceptions for others of what “slender,” “lean,” and “big-boned” actually mean.

Many people are hybrids of two body types rather than pure breeds.

Catudal states that body types are usually arranged on a spectrum. This means you might have a dominant body style with some characteristics of another kind or a body type with qualities evenly split between two classes.

It’s almost like personality types. It’s easy to group people into categories. But the good news about being a combination type is that you have the strength of both ectomorphs and the endurance of an ectomorph. This can make it possible to gain significant training gains.

He says that ectomorphs have the most common natural hybrids. They have long, slim limbs with wider chests and shoulders. Endo-mesomorphs have dense, muscular bodies.

Endo-ectomorphs, on the other side, have slim legs and large amounts of fat stored in their midsection. This is often due to years of poor diet and sedentary living. Catudal states that this body type is often a result of lifestyle, not genetics. This means that a healthier diet, exercise routine, and other healthy habits can improve it.

You can find the proper diet for you. Exercise will determine your shape.

Catudal states that it is easy to eat a poor diet. He says, “In the end, if your body is taking in too much food or the wrong kinds of food, it will grow poorly.”

You will likely get the body you desire by paying attention to your diet. Catudal states that exercise is the key to determining your muscle-to-fat ratio. It’s what will sculpt your muscles and give you the definition.

Your body will be toned and tighter if you eat and train well.

An Ectomorph doesn’t need as much aerobic exercise as other body types to stay slim.

Ectomorphs are already slim, so they don’t require much cardio. Catudal says that ectomorphs who do too much cardio may experience an increase in cortisol levels, which causes their body to store fatter as it believes they are under stress. It’s why you see many thin-fat runners with excess belly fat and skinny legs.

He states that ectomorphs need to increase muscle mass and strength using strength training to tone their muscles and prevent common problems such as back pain or osteoporosis.

Catudal suggests that you focus on ‘compound lifts,’ which involve multiple joints and muscles, such as deadlifts or squats with dumbbells, for a few days each week to get the toned and sculpted look you desire. You can also make a combination move, such as a pushup into a side plank. After you have completed a pushup, raise one arm towards the ceiling, then move into a side plank. Repeat the process on the other side.

You can also replace aerobic exercises with high-intensity intermittent training (HIIT). This involves alternating short periods of intense exercise with shorter periods of slower, more controlled activity. He recommends strength training at least twice weekly to lose body fat and retain muscle. The most recent physical activity guideline for adults from the U.S. Department of Health and Human Services is to do some strength training or resistance exercise at least twice weekly for good health. Small dietary changes, such as swapping out carbs for more protein, can help build muscle.

Maintaining a low-intensity, steady-state cardio is essential for mesomorphs.

You can be happy with your body and keep it that way if you are a mesomorph. You can do it by walking at 65-75 percent of your maximum heartbeat.

Catudal warns that mesomorphs are less likely to have slow-twitch muscle fibers, which have a high aerobic potential and are used for distance running. This can make them more frustrated or need help maintaining a healthy training program. It’s essential for mesomorphs they change their workouts regularly, for example, with sprints or HIIT. This can trick your body and heart into being fitter quicker.

Endomorphs with curvy curves have the potential to be super-strong athletes with well-defined muscles.

Start with a low to the moderate-intensity cardio program to burn stubborn fat. Once you have made progress, add a strength training program. Catudal states that cardio is crucial for fat loss and conditioning.

Once you get to strength-building, remember that endomorphs respond well to isolation exercises (work one muscle at a time). Targeting your quads with squats or lunges will be most effective while targeting your biceps using biceps curls will work.

As you age, your chances of falling into a hybrid Ecto-Endomorph or Meso-Endomorph state are more significant if you become more sedate.

Catudal states that if you reduce physical activity and increase your food intake, especially after 50 years old, your levels of testosterone as well as growth hormone, will likely decrease. This can make you more susceptible to storing excess fat and losing muscle.

He says, “It’s much easier to keep something and maintain them than to try and reverse the process and get it back on track.” So try to avoid making these mistakes. These slips can happen, despite your best efforts. Instead of focusing on compound strength-training movements, cut down on starchy carbs.