title: Inspiratory muscle performance in endurance-trained elderly males during incremental exercise.
abstract: The aim of this study was to compare the inspiratory muscle performance during an incremental exercise of twelve fit old endurance-trained athletes (OT) with that of fit young athletes (YT) and healthy age-matched controls (OC). The tension-time index (TT0.1) was determined according to the equation TT0.1=P0.1/PImax×ti/ttot, where P0.1 is the mouth occlusion pressure, PImax the maximal inspiratory pressure and ti/ttot the duty cycle. For a given VCO2, OT group displayed P0.1, P0.1/PImax ratio, TT0.1 and effective impedance of the respiratory muscle values which were lower than OC group and higher than YT group. At maximal exercise, P0.1/PImax ratio and TT0.1 was still lower in the OT group than OC group and higher than YT group. This study showed lower inspiratory muscle performance attested by a higher (TT0.1) during exercise in the OT group than YT group, but appeared to be less marked in elderly men having performed lifelong endurance training compared with sedentary elderly subjects.
authors.affiliation: EA 3300 "APS and Motor Patterns, Adaptations-Rehabilitation,", Picardie Jules Verne University, Sport Science Department, F-80025 Amiens Cedex, France; Tunisian Research Laboratory Sport Performance Optimization, National Center of Medicine and Science in Sports (CNMSS), Bp263, Ave Med Ali Akid, 1004 El, Menzah, Tunis, Tunisia. Electronic address: mehdi.chlif@gmail.com.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Chlif
authors.affiliation: EA 3300 "APS and Motor Patterns, Adaptations-Rehabilitation,", Picardie Jules Verne University, Sport Science Department, F-80025 Amiens Cedex, France.
authors.forename: David
authors.initials: D
authors.lastname: Keochkerian
authors.affiliation: EA 3300 "APS and Motor Patterns, Adaptations-Rehabilitation,", Picardie Jules Verne University, Sport Science Department, F-80025 Amiens Cedex, France.
authors.forename: Abdou
authors.initials: A
authors.lastname: Temfemo
authors.affiliation: EA 3300 "APS and Motor Patterns, Adaptations-Rehabilitation,", Picardie Jules Verne University, Sport Science Department, F-80025 Amiens Cedex, France; Department of Cardiac Rehabilitation, Corbie's hospital, F-80800 Corbie, France.
authors.forename: Dominique
authors.initials: D
authors.lastname: Choquet
authors.affiliation: EA 3300 "APS and Motor Patterns, Adaptations-Rehabilitation,", Picardie Jules Verne University, Sport Science Department, F-80025 Amiens Cedex, France.
authors.forename: Said
authors.initials: S
authors.lastname: Ahmaidi
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006801:Humans; D008297:Male; D008875:Middle Aged; D009055:Mouth / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology; D011312:Pressure; D012119:Respiration; D012129:Respiratory Function Tests; D012132:Respiratory Muscles / Q000502:physiology*; D013147:Spirometry; D055815:Young Adult
keywords: Breathing pattern; Dyspnea; Effective impedance; Mouth occlusion pressure; Respiratory-muscle strength; Ventilatory constraints