Table 1. Determinants of reliability for maximal inspiratory strength (i.e., S-Index) measured with a POWERbreathe® inspiratory muscle trainer in seven recreationally-active individuals.
|
ICC |
Change in mean |
Typical error |
| All 6 trials |
.88 |
|
|
|
| Trial 1 & 2 |
.87 |
Mean (cmH2O)
90% CI’s
Mean (%)
90% CI’s |
3.79
-3.93 – 11.52
5.2
-4.3 – 15.5 |
7.44
.36 – .99
9.5
6.5 – 18.9 |
| Trial 3 & 6 |
.90 |
Mean (cmH2O)
90% CI’s
Mean (%)
90% CI’s |
4.36
-2.85 – 11.58
3.9
-3.0 – 11.1 |
6.95
4.80 – 13.31
6.7
4.6 – 13.3 |
Six maximal dynamic inspiratory breathing maneuvers (trials) were performed over two days; three trials each day. Trial-to-trial reliability (All 6 trials and Trial 1 & Trial 2) and day-to-day reliability (Session 1, Trial 3 and Session 2, Trial 3 i.e., Trial 6) was assessed. There were no differences in the mean values between Trial 1 & Trial 2 or between Trial 3 & Trial 6 (p > 0.05). ICC = intraclass correlation coefficient.
