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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

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.

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