title: Endurance exercise training increases peripheral vascular response in human fingers.
abstract: The purpose of this study was to clarify whether peripheral vascular response to alteration of transmural pressure is changed by endurance exercise training. The healthy male subjects (training group; n = 6) performed endurance exercise training that consisted of cycle ergometer exercise 5 d.week-1 and 30 min.d-1 for a period of 8 weeks. Changes in the peripheral vascular response to alteration of transmural pressure in the human finger were measured by a differential digital photoplethysmogram (DeltaDPG) and blood pressure during passive movement of the arm to different vertical hand positions relative to heart level. Following 8 weeks of endurance training, percent changes in DeltaDPG from heart level in the training group increased significantly (mean +/- SD, -48.1 +/- 7. 3 to -58.7 +/- 9.3% at the lowered position, 46.1 +/- 13.4 to 84.6 +/- 8.8% at the elevated position, p<0.05). Similarly, the arterial compliance index, which was calculated from DeltaDPG-P wave amplitude and arterial pulse pressure, also significantly changed in the training group over the 8 weeks (5.6 +/- 1.3 to 2.7 +/- 1.6 mV. V-1.s-1.mmHg-1 at the lowered position, 30.0 +/- 12.4 to 54.4 +/- 18. 9 mV.V-1.s-1.mmHg-1 at the elevated position ). Maximal oxygen uptake (V.O2 max) was significantly increased in the training group. On the other hand, the control group (n = 6) showed no significant changes in all parameters for 8 weeks. Therefore these results suggest that endurance exercise training induces an increase in peripheral vascular response to alteration of transmural pressure in the human finger.
authors.affiliation: Research Center of Health, Physical Fitness and Sports, Nagoya University, Chikusa-ku, Nagoya, 464-8601, Japan. keishok@tsuru.med.nagoya-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Katayama
authors.forename: M
authors.initials: M
authors.lastname: Shimoda
authors.forename: J
authors.initials: J
authors.lastname: Maeda
authors.forename: T
authors.initials: T
authors.lastname: Takemiya
mesh_terms: D000328:Adult; D001132:Arm; D001794:Blood Pressure / Q000502:physiology; D005081:Exercise Therapy; D005385:Fingers / Q000098:blood supply*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D017156:Photoplethysmography; D010807:Physical Endurance / Q000502:physiology*; D011187:Posture; D011312:Pressure; D013997:Time Factors