”…respiratory training significantly increased the endurance time of respiratory muscles…blood lactate concentrations were reduced during post training exercise…respiratory trained subjects had lost the sensation of breathlessness.
”Improvements in submaximal cycling endurance performance have been reported following 4 weeks of respiratory muscle training comprising isocapnic hypernea (Boutellier et al, 1992) or resistive inspiratory loading (Caine and McConnell,…
”It is accepted that respiratory muscle strength declines with advancing age and that inspiratory muscle weakness is associated with an increase in exertional breathlessness.
”Inspiratory muscle training at high intensity loads significantly improved inspiratory muscle strength, respiratory muscle endurance, and respiratory symptoms during daily activities and respiratory exertion.
”In patients with asthma, the respiratory muscles have to overcome the increased resistance while they become progressively disadvantaged by hyperinflation.
”We conclude that specific inspiratory muscle training for 6 months improves inspiratory muscle strength and endurance in patients with COPD.
”’We conclude that inspiratory muscle training using a load of 30% peak maximal inspiratory pressure improves dyspnoea, increases walking capacity, and reduces the metabolic cost of exercise.
‘It has been previously shown that the inspiratory muscles of patients with congestive heart failure (CHF) are weaker than those of normal persons. This weakness may contribute to the dyspnoea and limit exercise capacity in these patients.