“…To date, 26 articles have examined the effects of IMT in patients with HF (Table 1) [20,30,31,35,. Twenty-one of these studies were randomized clinical trials [20,30,31,35,[49][50][51][52][53][54][55][56][57][59][60][61][62][63][66][67][68][69] (Table 1a,b), four studies were quasi-experimental studies [48,58,64,65], and one study was a clinical case [59] ( Table 1c). The sample size for most of these studies was small.…”