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Author/Association: Mickleborough TD, Nichols T, Lindley MR, Chatham K, Ionescu AA
Title: Inspiratory flow resistive loading improves respiratory muscle function and endurance capacity in recreational runners [with consumer summary]
Source: Scandinavian Journal of Medicine & Science in Sports 2010 Jun;20(3):458-468
Method: clinical trial
Method Score: 4/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: No; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: No; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed*
Consumer Summary: PERSPECTIVES: A great deal research has been conducted on the response of the respiratory muscles to IMT and its effects on exercise performance (McConnell and Romer, 2004). However, there is scant data (Edwards and Cooke, 2004; Downey et al, 2007; Leddy et al, 2007; Williams et al, 2002) available pertaining to the efficacy of IMT on cardiopulmonary and metabolic measures and running performance. The present study utilized a novel approach to IMT, specifically IFRL based on the TIRE training protocol and incorporating computerized biofeedback. This type of IMT has been shown to increase diaphragm thickness, lung volumes and cycling exercise capacity in healthy subjects (Enright et al, 2006b), improve lung function and exercise capacity (Enright et al, 2004), improve cycling time to exhaustion (Gething et al, 2004b) and enhance sputum expectoration in patients cystic fibrosis (Chatham et al, 2004). Therefore, IFRL may prove to be beneficial to inspiratory muscle strength and endurance and whole-body exercise performance in both healthy individuals and patients with cardiopulmonary disease.
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