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Table 1 The effect of standing and different sitting postures on four standard spirometric parameters

From: The effect of standing and sitting postures on breathing in brass players

Vital capacity
Stand Sit flat Sit slope down Sit slope up Slope back
94.3 ± 2.08% 93.6 ± 1.98% 93.0 ± 2.01% 92.9 ± 1.98% 91.9 ± 1.92%
Probability Slope back Sit slope up Sit slope down Sit flat
Stand 0.004 0.022 0.054 0.191
Sit flat 0.050 0.180 0.201  
Sit slope down 0.170 0.466   
Sit slope up 0.141    
Forced Vital Capacity (FVC)     
Stand Sit flat Sit slope down Sit slope up Slope back
99.2 ± 2.2% 98.4 ± 2.00% 98.3 ± 2.03% 98.3 ± 2.18% 96.1 ± 2.18%
Probability Slope back Sit slope up Sit slope down Sit flat
Stand <0.001 0.036 0.167 0.052
Sit flat 0.01 0.396 0.427  
Sit slope down 0.014 0.483   
Sit slope up 0.002    
FEV1     
Stand Sit flat Sit slope down Sit slope up Slope back
98.3 ± 2.18% 99.2 ± 2.31% 99.1 ± 2.1% 98.5 ± 2.18% 95.7 ± 2.21%
Probability Slope back Sit slope up Sit slope down Sit flat
Stand 0.024 0.355 0.199 0.236
Sit flat 0.001 0.189 0.262  
Sit slope down <0.001 0.158   
Sit slope up 0.001    
Peak Expiratory Flow (PEF)     
Stand Sit flat Sit slope down Sit slope up Slope back
88.0 ± 1.94% 85.6 ± 1.76% 86.3 ± 1.66% 86.1 ± 2.00% 84.8 ± 2.04%
Probability Slope back Sit slope up Sit slope down Sit flat
Stand 0.002 0.080 0.083 0.117
Sit flat 0.280 0.391 0.293  
Sit slope down 0.105 0.459   
Sit slope up 0.116    
  1. For each parameter, the upper cells contain descriptive statistics (mean ± s.e.m., n = 30) expressed as a percentage of predicted values (ECSC), while the lower cells provide a statistical comparison between them. Probabilities of <0.05 are in bold type.