title: Cardiovascular response to static handgrip in trained and untrained men.
abstract: The influence of aerobic capacity on the cardiovascular response to handgrip exercise, in relation to the muscle mass involved in the effort, was tested in 8 trained men (T) and 17 untrained men (U). The subjects performed handgrip exercises with the right-hand (RH), left-hand (LH) and both hands simultaneously (RLH) at an intensity of 25% of maximal voluntary contraction force. Maximal aerobic capacity was 4.3 l.min-1 in T and 3.21 l.min-1 in U (P less than 0.01). The endurance time for handgrip was longer in T than in U by 29% (P less than 0.05) for RH, 38% (P less than 0.001) for LH and 24% (P less than 0.001) for RLH. Heart rate (fc) was significantly lower in T than in U before handgrip exercise, and showed smaller increases (P less than 0.01) at the point of exhaustion: 89 vs 106 beats.min-1 for RH, 93 vs 100 beats.min-1 for LH and 92 vs 108 beats.min-1 for RLH. Stroke volume (SV) at rest was greater in T than in U and decreased significantly (P less than 0.05) during handgrip exercise in both groups of subjects. At the point of exhaustion SV was still greater in T than in U: 75 vs 57 ml for RH, 76 vs 54 ml for LH and 76 vs 56 ml for RLH. During the last seconds of handgrip exercise, the left ventricular ejection time was longer in T than in U. Increases in cardiac output (Qc) and systolic blood pressure did not differ substantially between T and U, nor between the handgrip exercise tests.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Applied Physiology, Polish Academy of Sciences, Warsaw.
authors.forename: R
authors.initials: R
authors.lastname: Grucza
authors.forename: J
authors.initials: J
authors.lastname: Smorawiński
authors.forename: G
authors.initials: G
authors.lastname: Cybulski
authors.forename: W
authors.initials: W
authors.lastname: Niewiadomski
authors.forename: J F
authors.initials: JF
authors.lastname: Kahn
authors.forename: B
authors.initials: B
authors.lastname: Kapitaniak
authors.forename: H
authors.initials: H
authors.lastname: Monod
mesh_terms: D000328:Adult; D001794:Blood Pressure; D002302:Cardiac Output; D002320:Cardiovascular Physiological Phenomena; D015444:Exercise / Q000502:physiology*; D006225:Hand; D006339:Heart Rate; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology; D010806:Physical Education and Training; D010807:Physical Endurance / Q000502:physiology*; D013318:Stroke Volume