
Measuring muscle size is a common practice for bodybuilders and weightlifters, as it helps to track progress and plan workouts. There are different methods for measuring muscle size, and opinions vary on whether measurements should be taken with muscles flexed or relaxed. Some sources recommend measuring muscles in a relaxed state to ensure consistent and accurate results, as flexing can lead to inconsistent measurements and distort true muscle size. Others suggest measuring in a flexed state, particularly for bodybuilders interested in aesthetics and achieving ideal proportions. Ultimately, the decision to measure muscles flexed or relaxed may depend on individual preferences and goals.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Flexed or relaxed | Relaxed measurements are more consistent and accurate, but flexed measurements can be done for an ego boost |
| Time of measurement | Measurements should be taken at the same time of day under consistent conditions |
| Measuring tape | A flexible steel tape called a Gullick tape is recommended to measure circumference and tension |
| Arm position | Arm should be parallel to the ground with the hand pulled toward the shoulder until the elbow points forward |
| Tape placement | Tape should be wrapped around the largest part of the arm, typically the peak |
| Wrist proportion | Arm should ideally be 2.5 times larger than the wrist |
| Calf proportion | Flexed calves should match flexed arms |
| Waist proportion | Shoulder measurement should be 1.618 times larger than the waist, creating a V-taper |
| Recording measurements | It is beneficial to record all measurements in one place to track progress and identify problem areas |
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What You'll Learn

Measuring flexed muscles can lead to inconsistent results
Additionally, it is more difficult to control the amount of flex in different muscle groups, which can lead to inconsistent results. For instance, it is challenging to ensure that a pump is relatively equivalent in all the muscles being measured. This can result in some muscles appearing larger than others, even if they are not.
Furthermore, flexing the muscles can distort the measurement, especially if the measuring tape is pulled too tight. This can lead to inaccurate readings and make it challenging to track progress accurately. It is recommended to use a flexible steel tape, such as a Gullick tape, to help ensure consistent measurements. This type of tape measures both the circumference of the arm and the amount of tension on the tape, helping to prevent distortion.
To achieve consistent and accurate measurements, it is best to measure muscles in a relaxed state. This allows for a more precise evaluation of muscle growth over time. It is also recommended to measure at the same time of day and under consistent conditions to minimize the impact of temporary factors, such as exercise and hydration, which can affect muscle size. By following these guidelines, individuals can effectively track their progress and make informed decisions about their training regimens.
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Measure relaxed muscles for accuracy and consistency
Measuring relaxed muscles is key to ensuring accuracy and consistency in your results. Flexing a muscle will cause it to appear larger than when it is relaxed, and the amount of flex will vary from day to day, so flexed measurements will be inconsistent. In addition, different muscle groups will increase in size by different amounts when flexed, which will skew the results. For example, the bicep will increase more in size than the calf when flexed. Therefore, it is best to take measurements with the muscles in a relaxed state.
To measure your biceps, do so before you lift weights, as working out temporarily inflates the size of your muscles. Wrap a measuring tape around the thickest part of your bicep, ensuring that the tape is flat against your skin with no twists or bumps. Take several measurements for accuracy, and always measure at the same time of day under consistent conditions. Measure both biceps to help you compare your arms and identify any imbalances.
Similarly, when measuring your arms, calves, chest, hips, thighs, and waist, it is important to keep your body relaxed without flexing or sucking in your stomach. Stand tall with your feet together and your torso straight, and find the midpoint or thickest part of the muscle you are measuring. Ensure that the tape is parallel to the floor and wear fitted clothing or no clothing at all to ensure accurate results.
Recording all your measurements in one place is a great way to track your progress and stay motivated. It allows you to see the numbers climbing and identify any problem areas that need more focus. By measuring relaxed muscles consistently, you can accurately gauge your growth and development over time.
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Avoid pulling the measuring tape too tight
When measuring muscles, it is important to avoid pulling the measuring tape too tight. This is because the tape should only be as tight as it needs to be to get an accurate measurement. Pulling the tape too tight can result in compression of the skin or muscle, which can lead to inaccurate readings. For example, if you are measuring your chest, the tape should be snug but not tight enough to compress your flesh. It should cover the fullest part of your chest and back, going over the blades, and running parallel to the ground.
Additionally, the type of measuring tape you use can also affect the tightness. Shorter measuring tapes tend to be tighter than longer ones. Therefore, it is important to use a tape that is long enough for the specific body part being measured.
It is also worth noting that flexing the muscle while taking measurements is generally not recommended as it can lead to inconsistent results. This is because flexing can temporarily increase the size of the muscle, and the amount of increase can vary between different muscle groups. For example, flexing the biceps will result in a larger increase in size compared to flexing the calf. Therefore, it is best to take measurements when the muscle is in a relaxed state.
However, there may be certain situations where measurements are taken while flexed, such as in bodybuilding or specific medical assessments. In these cases, it is still important to avoid pulling the measuring tape too tight to maintain consistency in readings.
Overall, when measuring muscles, it is crucial to strike a balance with the tightness of the measuring tape. It should be snug enough to stay in place without slipping, but not so tight that it compresses the skin or muscle. By following these guidelines, you can ensure accurate and consistent measurements.
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Measure at the same time of day for consistency
Consistency is key when it comes to measuring muscle growth over time. Measuring at the same time of day is an important part of maintaining consistency in your measurements. This is because the temporary effects of exercise and hydration can impact muscle size, so measuring at a different time of day could lead to inconsistent results. For example, if you measure your biceps in the morning before a workout, your muscles will be in a more relaxed state compared to after a workout when they are temporarily inflated due to exercise.
By always measuring at the same time of day, you can minimize the variability in your measurements and accurately track your progress. This consistent measurement practice is especially important if you are focusing on a specific muscle group, such as the biceps, and want to see how your training regimen is impacting that particular area over time.
Additionally, it is worth noting that the time of day is not the only factor that contributes to consistency. It is also crucial to use the same measuring techniques and equipment each time. For example, strength training coach Charles Poliquin recommends the use of a Gullick tape, a flexible steel tape that measures both circumference and tension, to ensure accurate and consistent arm measurements.
Moreover, it is important to consider the state of your muscles when measuring. As mentioned earlier, avoiding measurements after a workout is advisable due to the temporary inflation of muscles. Similarly, it is recommended to avoid having a "pump" when measuring, as this can lead to inconsistencies between different muscle groups. A "pump" refers to the engorged feeling in your muscles during or after a workout, and it can be challenging to control and standardize across all the muscles you are measuring.
In conclusion, measuring at the same time of day is a crucial component of ensuring consistency in your muscle measurements. Combined with other consistent practices, such as using the same equipment and techniques, you can accurately track your progress and make informed decisions about your training regimen.
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Measuring before a workout is best for a natural state
Measuring your body before a workout is best if you want to record your body's natural state. This is because, after a workout, your body will be pumped up, which will lead to inconsistent results. It is also important to measure your body before a workout if you want a consistent measurement.
When measuring your body, it is recommended to wear fitted clothing or no clothing at all so that the garments do not factor into the measurements. You should stand tall with your feet together and stay relaxed without flexing or sucking in your stomach. It is also important to use a flexible, inelastic tape measure, such as a cloth measuring tape or a tape measure specifically designed for body measurements, like the MyoTape Body Tape Measure.
Taking body measurements is an optimal way to track your weight loss progress and understand what's happening with your body. It is a valuable tool if you are trying to change your body composition by losing fat and/or adding muscle. While stepping on the scale is the easiest and most accessible way to monitor progress, it does not always provide an accurate picture of your progress. This is because muscle weighs more than fat but takes up less space, so you could be gaining muscle and losing fat but see no change on the scale.
To get the most accurate picture of your progress, it is recommended to take measurements every 2 to 4 weeks. This will allow you to see how your efforts are affecting your body composition. Additionally, recording all your measurements in one place is a great way to gauge your progress and keep a good perspective on your growth. It will also help you stay motivated and focus on any problem areas that need more work.
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Frequently asked questions
It is recommended to measure muscles in a relaxed state. This is because flexing will provide results that are inconsistent from one measuring to the next, and will also compound the differences between different muscle groups. For example, the biceps increase in size more when flexed compared to the calf muscle.
To measure your biceps, do so before lifting weights as working out temporarily inflates the size of your muscles. Wrap a measuring tape around the thickest part of your bicep, ensuring it is against your bare skin. Keep the tape flat against your skin with no twists or bumps, and take several measurements for accuracy.
Consistency is key when measuring any body part. Measure at the same time of day under consistent conditions, and track your measurements over time to see progress and stay motivated. It is also important to use the correct tools, such as a Gullick tape, which measures the arm's circumference and the amount of tension on the tape, ensuring accurate results.

































