Correlation of respiratory muscle strength with anthropometric variables of normal-weight and obese women.
OBJECTIVE
To correlate anthropometric data and respiratory muscle strength (RMS) of normal-weight and obese women.


METHODS
The sample consisted of 103 sedentary women, divided into two groups: 57 obese and 46 normal-weight women. Waist circumference (WC) and hip circumference (HC) were measured to calculate the waist-to-hip ratio (WHR), and maximal respiratory pressures (Pmax) were determined using an analog vacuum manometer to ± 300 cm H2O. Body composition was measured using tetrapolar bioelectrical impedance analysis. Descriptive statistics was used for data analysis, in addition to the Student t test for independent samples, Pearson correlation, and stepwise multiple linear regression analysis. Significance level was set at p ≤ 0.05.


RESULTS
The analysis showed significant differences in Pmax of normal-weight women (PImax = -73.04±16.55 cm H2O and PEmax = 79.67±18.89 cm H2O) and obese women (PImax = -85.00±21.69 cm H2O and PEmax = 103.86±20.35 cm H2O). Anthropometric and manometric variables showed no significant correlation in both groups. When analyzing the influence of bioelectrical impedance on RMS, a positive correlation was observed between lean body mass and PImax.


CONCLUSIONS
Bioelectrical impedance and obesity showed a direct correlation with RMS. WC and WHR had no influence on RMS of obese women; however, a relevance to risk factors for associated diseases was observed. We believe that these results are due to an adjustment to excess body weight over the years.
Costa
Thais Ribeiro
TR
Universidade Católica de Brasília (Campus I), Brasília, DF, Brazil. tareides@gmail.com
Lima
Tiago Pessoa
TP
Gontijo
Patrícia Lúcia
PL
Carvalho
Harley Alves de
HA
Cardoso
Flávia Perassa de Faria
FP
Faria
Orlando Pereira
OP
Cavalcanti Neto
Florêncio Figueiredo
FF
D000328:Adult; D003430:Cross-Sectional Studies; D017097:Electric Impedance; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008176:Lung Volume Measurements; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology*; D009765:Obesity / Q000503:physiopathology*; D010101:Oxygen Consumption / Q000502:physiology; D012132:Respiratory Muscles / Q000503:physiopathology*; D057185:Sedentary Behavior; D013147:Spirometry; D055815:Young Adult