Muscle Size Assessment

What is my patient/athletes muscle size? Are there discrepancies?

Important reasons to monitor Muscle Size 

  • Prevention/reversal of injury related muscle atrophy 
  • Return of muscle size symmetry to contralateral limbs, post injury 
  • The age-related rate of muscle mass loss (Sarcopenia) 
  • Assessment of potential game-related injury risk
1
Select Muscle Size from the menu
For muscle size, scan every 2 to 4 weeks to assess change. Ensure muscles are at rest, and fully recovered from prior sessions.
2
Scan Muscles of Interest
The current muscles that are able to be assessed are Rectus Femoris and Vastus Lateralis muscles. Future muscles are: Biceps Brachii, Lateral Hamstring, and Gastrocnemius/Soleus.
3
Design a treatment/training program guided by the analysis of scan results
Summary statuses provide an overall view of current muscle size, and trends.
MuscleSound also determines a "Size Category" for each muscle, based on comparisons with thousands of scanned muscles from individuals with the same BMI, Age, and Gender.
Charts will also provide feedback on historical responses to your interventions. What was effective previously? How did their MuscleHealth respond?
It is also valuable to drill-down into a specific muscle group or muscle side to ask some questions about what could be the cause of abnormal results.
4
Schedule a follow-up
This is not really a calendar tool. Use the scheduling tool to help remind the subject/athlete of the prescribed intervention, have these results sent to them in a reminder to be sure they return for a follow-up.
5
Follow-up with another Muscle Size Assessment
Track and monitor the response of you interventions. Modify as needed.

Results Provided

Muscle Size Difference

Current muscle mm size (left and right). Current muscle size difference % and status. The muscle size category is based on peer group (Muscle, Age, Gender, BMI). 

The sizes and their categories are charted, status based on % difference


Status Determination

Statuses are determined from an extensive MuscleSound database of scanned images.

Indicates % size difference is in the very high range--above the top 25th percentile of all scores. Greater potential for increased risk of injury and negative impact on performance.

Indicates % size difference is in the moderately high range--between the top 50th and 25th percentiles of all scores. Some potential for increased risk of injury and negative impact on performance.

Indicates % size difference is in the normal range--below the 50th percentile of all scores. Minimal risk of injury and impact on performance.

When multiple muscle groups are scanned, or if there is a trend to consider the status is determined by this table

Overall % Difference of contralateral muscles Trend Resulting Status
> 15% RF muscles
> 28% VL muscle
> 22% Both RF and VL muscles
NA
8% to 15% RF muscles
12% to 28% VL muscles
10% to 22% Both RF and VL muscles
NA
< 8% RF muscles
< 12% VL muscles
< 10% Both RF and VL muscles
NA

> 15% RF muscles
> 28% VL muscles
> 22% Both RF and VL muscles
> + 5%
> 15% RF muscles
> 28% VL muscles
> 22% Both RF and VL muscles
-5% to +5%
> 15% RF muscles
> 28% VL muscles
> 22% Both RF and VL muscles
< -5%
8% to 15% RF muscles
12% to 28% VL muscles
10% to 22% Both RF and VL muscles
> + 5%
8% to 15% RF muscles
12% to 28% VL muscles
10% to 22% Both RF and VL muscles
-5% to +5%




8% to 15% RF muscles
12% to 28% VL muscles
10% to 22% Both RF and VL muscles
< -5%




< 8% RF muscles
< 12% VL muscles
< 10% Both RF and VL muscles
> + 5%
< 8% RF muscles
< 12% VL muscles
< 10% Both RF and VL muscles
-5% to +5%
< 8% RF muscles
< 12% VL muscles
< 10% Both RF and VL muscles
< -5%

Assessing Muscle Size with MuscleSound

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