Effects of a taped filter mask on peak power, perceived breathlessness, heart rate, blood lactate and oxygen saturation during a graded exercise test in young healthy adults: a randomized controlled trial

Table 5 Results of the graded exercise test

Parameters	NM	SM	TFM	ANOVA	NM versus SM	NM versus TFM	SM versus TFM
Maximal workload (Watt)	278 ± 56	269 ± 56	247 ± 56	< 0.001	0.560	< 0.001	0.018
Time to exhaustion (minutes)	29.2 ± 6.6	27.5 ± 6.3	25.6 ± 6.2	< 0.001	0.046	< 0.001	0.046
Maximal dyspnoea rating	9.8 ± 0.5	9.7 ± 0.7	9.8 ± 0.5	0.935	1.000	1.000	1.000
Minimal SpO₂%	92 ± 3	90 ± 6	89 ± 4	0.211	1.000	0.249	1.000
Maximal heart rate (beat per minute)	189 ± 5	185 ± 3	182 ± 7	0.066	0.330	0.069	0.330
Maximal Lactate concentration (mmol/L)	9.0 ± 2.0	7.8 ± 1.4	6.6 ± 2.0	0.011	0.164	0.009	0.164

Results of the parameters are reported as mean ± standard deviation
NM no mask, SM surgical mask, TFM taped filter mask, ANOVA analysis of variance, SpO₂ oxygen saturation, La blood lactate concentration
p Values are shown for statistical analysis
Significant results are indicated in bold

ISSN: 2052-1847