Editorial: Should BMI be Reported in a Paper’s Abstract?
Pantelis T. Nikolaidis1, *, Daniel A. Marinho2
Identifiers and Pagination:Year: 2022
E-location ID: e1875399X2208020
Publisher ID: e1875399X2208020
Article History:Received Date: 6/6/2022
Revision Received Date: 20/6/2022
Acceptance Date: 20/7/2022
Electronic publication date: 26/09/2022
Collection year: 2022
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Body mass and height are major anthropometric characteristics used to profile athletes’ characteristics. The importance of these variables is highlighted in several scientific papers, where reporting body mass and height in both abstract and main text (methods section) of scientific papers is highly recommended by journals’ editors. A widely used index describing the relationship between body mass and height is body mass index (BMI). Although there is a consensus for reporting body mass and height of athletes in research, BMI is rarely presented. The aim of the present editorial is to provide evidence supporting the decision about whether BMI should be reported in the abstract and main text.
Many studies focused on the usefulness of BMI as a surrogate of body fat percentage (BF) . For instance, in female and male National Collegiate Athletic Association Division III athletes, BMI frequently classified muscular individuals who did not have high skinfold measurements as overweight . In both women and men, athletes showed lower total subcutaneous adipose tissue thickness compared with BMI-matched non-athletes . In another study, BMI was higher, although BF was lower in the trained group when compared to the untrained . Consequently, BMI should be used with caution to classify fatness in athletes .Moreover, it has been supported that BMI-based BF equations could potentially be utilized within a field setting to predict mean BF for an entire group of female athletes but would not be appropriate for predicting BF for individuals . BMI is increased by high amounts of both lean and fat tissue . Although BMI is widely used as a surrogate measure of adiposity, it is a measure of excess weight, rather than excess body fat, relative to height .
In addition to the association with BF, BMI has relevance with sports injuries [6-9]. A study on USA high school athletes observed that, compared with normal weight athletes, obese athletes sustained a larger proportion of knee injuries and underweight athletes sustained a larger proportion of fractures indicating a variation of injury patterns by BMI . In male collegiate athletes, BMI was related to ankle sprain injuries . Furthermore, in adolescents (12-19 years), there was a 34% increased risk for all sports injury in obese adolescents compared to healthy adolescents . In university students of Physical Education, BMI was higher in injured athletes than in non-injured ones . BMI is also relevant to recovery after hip arthroscopy in athletes. For instance, female athletes with low BMI - when compared with a control group with normal BMI - exhibited higher rates of revision and lower rates of achieving the minimal clinically important difference for the modified Harris Hip Score, Patient Acceptable Symptom State for the International Hip Outcome Tool–12, and maximum outcome improvement satisfaction threshold for the visual analog scale .
An association of BMI with other performance- and health-related aspects such as cognitive function , biomechanics , and serum ferritin concentration  has also been noticed. In Division I collegiate athletes, higher BMI is associated with reduced cognitive function . With regards to biomechanics, strong correlations between joint kinetics and BMI were observed in youth baseball pitchers, indicating that select body composition measures may be correlated with pitching arm joint kinetics . Finally, in female varsity athletes, higher BMI was associated with higher serum ferritin concentrations .
Profiling the characteristics of a sport is a field where BMI has large applications. For instance, there have been several studies showing differences in BMI among sports [14-16]. In a study of the top 20 athletes of 14 disciplines in the 2010 Winter Olympic Games, the largest average values of BMI were found for males and females in speed disciplines . Moreover, rhythmic gymnasts have a lower BMI than other athletes . In masters’ athletes of military personnel, BMI was similar in football, swimming, and volleyball, which in turn was higher than track-and-field and lower than softball .
CONFLICT OF INTEREST
Dr. Daniel Almeida Marinho is the Editor of the the journal The Open Sports Sciences Journal, and Dr. Pantelis Nikolaidis is co-editor of The Open Sports Sciences Journal.