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Relationship between reduced lower abdominal blood flows and heart rate in recovery following cycling exercise
Author(s) -
Osada T.,
Iwane H.,
Katsumura T.,
Murase N.,
Higuchi H.,
Sakamoto A.,
Hamaoka T.,
Shimomitsu T.
Publication year - 2012
Publication title -
acta physiologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.591
H-Index - 116
eISSN - 1748-1716
pISSN - 1748-1708
DOI - 10.1111/j.1748-1716.2011.02349.x
Subject(s) - heart rate , medicine , cardiology , cycling , blood flow , abdomen , hemodynamics , blood pressure , anesthesia , anatomy , archaeology , history
Aim: To examine the blood flow (BF) response in the lower abdomen (LAB) in recovery following upright cycling exercise at three levels of relative maximum pulmonary oxygen consumption () and the relationship of BF LAB to heart rate (HR) and target intensity.Methods: For 11 healthy subjects, BF (Doppler ultrasound) in the upper abdominal aorta (Ao) above the coeliac trunk and in the right femoral artery (RFA) was measured repeatedly for 720 s after the end of cycling exercises at target intensities of 30%, 50% and 85%, respectively. Blood flow in the lower abdomen (BF LAB ) can be measured by subtracting bilateral BF FAs (≈twofolds of BF RFA ) from BF Ao . Change in BF LAB (or BF LAB volume) at any point was evaluated by difference between change in BF Ao and in BF FAs . Heart rate and blood pressure were also measured.Results: At 85%, significant reduction in BF LAB by approx. 89% was shown at 90 s and remained until 360 s. At 50%, reduction in BF LAB by approx. 33% was found at 90 s although it returned to pre‐exercise value at 120 s. On the contrary at 30%, BF LAB showed a light increase (<20%) below 70 bpm of HR. There was a close negative relationship ( P < 0.05) between change in BF LAB and recovery HR, as well as between change in BF LAB volume and both recovery HR and %.Conclusion: This study suggests that the lower abdominal BF in recovery may be influenced by sympathetic‐vagus control, and dynamics of BF LAB may be closely related to the level of relative exercise intensities.