Abstract:
OBJECTIVE:To test the hypothesis that prolonged physical exercise induces long-lasting effects on blood pressure and heart rate we studied 17 endurance runners before and after the 1995 Sandia Wilderness Crossing Research Run (46 km of rocky trails, average altitude 2500 m). METHODS:We evaluated the response of the cardiovascular system to sympathetic stimulation by orthostatism and to sympathetic and parasympathetic carotid baroreceptor stimulations by sinusoidal neck suction at different frequencies (sympathetic activity on blood pressure by low-frequency stimulation, parasympathetic activity on RR interval by high-frequency stimulation). We used power spectral analysis of beat-to-beat RR interval, systolic and diastolic non-invasive blood pressure, in order to quantify the respiratory fluctuations (depending on vagal activity on the RR interval) and the slower non-respiratory fluctuations, depending on sympathetic activity on the blood pressure. Recordings were performed 24 h before, and 30 min, 24 h and 48 h after the run. RESULTS:Thirty minutes after the race we found reduced blood pressure, signs of relative sympathetic predominance (increased RR interval low-frequency/high-frequency ratio from 0.65 +/- 0.15 to 1.63 +/- 0.37, P < 0.05), reduced effect of parasympathetic baroreceptor stimulation (decrease in RR interval high-frequency neck-suction synchronous oscillations, from 5.33 +/- 0.34 to 3.55 +/- 0.37 ln-ms2, P < 0.005), unchanged blood pressure responses to sympathetic stimulations; 24 h after the race, the response to parasympathetic stimulation was increased (to 6.44 +/- 0.32 ln-ms2, P < 0.0005) compared to baseline (24 h before the race), whereas sympathetic stimulation by neck suction had no longer an effect on blood pressure. CONCLUSION:The acute effects of prolonged exertion are associated with a relative increase in sympathetic activity. Twenty-four hours after this race an increased sensitivity to vagal and reduced sensitivity to sympathetic baroreflex stimulation was found. In this field study at altitude we found long-lasting effects on cardiovascular autonomic modulation after physical exertion.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Bernardi L,Passino C,Robergs R,Appenzeller Odoi
10.1016/s0008-6363(97)00025-4subject
Has Abstractpub_date
1997-05-01 00:00:00pages
273-80issue
2eissn
0008-6363issn
1755-3245pii
S0008636397000254journal_volume
34pub_type
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journal_title:Cardiovascular research
pub_type: 杂志文章
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abstract::STUDY OBJECTIVE - The objective was to measure platelet function in vivo (as cutaneous bleeding time), the role of catecholamines, and the effect of inhibiting thromboxane synthesis on bleeding time, in patients with myocardial infarction, unstable angina, and non-cardiac chest pain. DESIGN - Haemotological variables ...
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journal_title:Cardiovascular research
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(98)00345-9
更新日期:1999-07-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/16.5.233
更新日期:1982-05-01 00:00:00
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更新日期:2004-08-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:
更新日期:1995-11-01 00:00:00
abstract::The effect of digoxin, at two different inotropic levels, was examined in normo- and hyperkalaemic dogs. For similar inotropic responses, normo- and hyperkalaemic dogs had similar levels of (Na+, K+)-ATPase inhibition and microsomal-bound digoxin. ...
journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/9.4.515
更新日期:1975-07-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/28.5.636
更新日期:1994-05-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2007.06.032
更新日期:2007-11-01 00:00:00
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journal_title:Cardiovascular research
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doi:10.1093/cvr/cvn055
更新日期:2008-05-01 00:00:00
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doi:10.1093/cvr/cvs262
更新日期:2012-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 临床试验,杂志文章
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更新日期:2019-01-01 00:00:00
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更新日期:2017-03-15 00:00:00
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更新日期:2009-09-01 00:00:00
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journal_title:Cardiovascular research
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doi:10.1093/cvr/cvaa205
更新日期:2020-07-16 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/15.8.456
更新日期:1981-08-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(00)00140-1
更新日期:2000-09-01 00:00:00
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journal_title:Cardiovascular research
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doi:10.1016/s0008-6363(97)00063-1
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journal_title:Cardiovascular research
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doi:10.1016/s0008-6363(97)00086-2
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journal_title:Cardiovascular research
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doi:10.1016/j.cardiores.2007.06.026
更新日期:2007-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.06.028
更新日期:2005-05-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvr111
更新日期:2011-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/s0008-6363(97)00314-3
更新日期:1998-04-01 00:00:00
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journal_title:Cardiovascular research
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doi:10.1093/cvr/cvs369
更新日期:2013-03-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章,评审
doi:10.1016/s0008-6363(97)00059-x
更新日期:1997-04-01 00:00:00
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journal_title:Cardiovascular research
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doi:10.1093/cvr/27.7.1359
更新日期:1993-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2000-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1016/s0008-6363(96)00167-8
更新日期:1996-12-01 00:00:00