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Effects of moderate-intensity aerobic cycling and swim exercise on post-exertional blood pressure in healthy young untrained and triathlon-trained men and women.
Clin Sci (Lond) 2013; 125(12):543-53CS

Abstract

Aerobic exercises such as running, walking and cycling are known to elicit a PEH (post-exercise hypotensive) response in both trained and UT (untrained) subjects. However, it is not known whether swim exercise produces a similar effect in normotensive individuals. The complex acute physiological responses to water immersion suggest swimming may affect BP (blood pressure) differently than other forms of aerobic exercises. We tested the hypothesis that an acute bout of swimming would fail to elicit a PEH BP response compared with an equivalent bout of stationary cycling, regardless of training state. We studied 11 UT and ten triathlon-trained young healthy normotensive [SBP/DBP (systolic BP/diastolic BP) <120/80 mmHg)] men and women (age 23±1 years) who underwent 30 min of intensity-matched cycling and swimming sessions to assess changes in BP during a 75-min seated recovery. CO (cardiac output), SV (stroke volume), TPR (total peripheral resistance), HR (heart rate), HRV (HR variability) and core and skin temperature were also assessed. In UT subjects, PEH was similar between cycling (-3.1±1 mmHg) and swimming (-5.8±1 mmHg), with the greater magnitude of PEH following swimming, reflecting a significant fall in SV between modalities (P<0.05). Trained individuals did not exhibit a PEH response following swimming (0.3±1 mmHg), yet had a significant fall in SBP at 50 min post-cycling exercise (-3.7±1 mmHg) (P<0.05). The absence of PEH after swimming in the trained group may reflect a higher cardiac sympathetic outflow [as indicated by the LF (low-frequency) spectral component of HRV) (25 and 50 min) (P<0.05)] and a slower return of vagal tone, consistent with a significant increase in HR between modalities at all time points (P<0.05). These results suggest that training may limit the potential for an effective post-exertional hypotensive response to aerobic swimming.

Authors+Show Affiliations

Department of Exercise Sciences, University of Toronto, Toronto, Canada.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

23763298

Citation

Lakin, Robert, et al. "Effects of Moderate-intensity Aerobic Cycling and Swim Exercise On Post-exertional Blood Pressure in Healthy Young Untrained and Triathlon-trained Men and Women." Clinical Science (London, England : 1979), vol. 125, no. 12, 2013, pp. 543-53.
Lakin R, Notarius C, Thomas S, et al. Effects of moderate-intensity aerobic cycling and swim exercise on post-exertional blood pressure in healthy young untrained and triathlon-trained men and women. Clin Sci. 2013;125(12):543-53.
Lakin, R., Notarius, C., Thomas, S., & Goodman, J. (2013). Effects of moderate-intensity aerobic cycling and swim exercise on post-exertional blood pressure in healthy young untrained and triathlon-trained men and women. Clinical Science (London, England : 1979), 125(12), pp. 543-53. doi:10.1042/CS20120508.
Lakin R, et al. Effects of Moderate-intensity Aerobic Cycling and Swim Exercise On Post-exertional Blood Pressure in Healthy Young Untrained and Triathlon-trained Men and Women. Clin Sci. 2013;125(12):543-53. PubMed PMID: 23763298.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of moderate-intensity aerobic cycling and swim exercise on post-exertional blood pressure in healthy young untrained and triathlon-trained men and women. AU - Lakin,Robert, AU - Notarius,Catherine, AU - Thomas,Scott, AU - Goodman,Jack, PY - 2013/6/15/entrez PY - 2013/6/15/pubmed PY - 2013/10/18/medline SP - 543 EP - 53 JF - Clinical science (London, England : 1979) JO - Clin. Sci. VL - 125 IS - 12 N2 - Aerobic exercises such as running, walking and cycling are known to elicit a PEH (post-exercise hypotensive) response in both trained and UT (untrained) subjects. However, it is not known whether swim exercise produces a similar effect in normotensive individuals. The complex acute physiological responses to water immersion suggest swimming may affect BP (blood pressure) differently than other forms of aerobic exercises. We tested the hypothesis that an acute bout of swimming would fail to elicit a PEH BP response compared with an equivalent bout of stationary cycling, regardless of training state. We studied 11 UT and ten triathlon-trained young healthy normotensive [SBP/DBP (systolic BP/diastolic BP) <120/80 mmHg)] men and women (age 23±1 years) who underwent 30 min of intensity-matched cycling and swimming sessions to assess changes in BP during a 75-min seated recovery. CO (cardiac output), SV (stroke volume), TPR (total peripheral resistance), HR (heart rate), HRV (HR variability) and core and skin temperature were also assessed. In UT subjects, PEH was similar between cycling (-3.1±1 mmHg) and swimming (-5.8±1 mmHg), with the greater magnitude of PEH following swimming, reflecting a significant fall in SV between modalities (P<0.05). Trained individuals did not exhibit a PEH response following swimming (0.3±1 mmHg), yet had a significant fall in SBP at 50 min post-cycling exercise (-3.7±1 mmHg) (P<0.05). The absence of PEH after swimming in the trained group may reflect a higher cardiac sympathetic outflow [as indicated by the LF (low-frequency) spectral component of HRV) (25 and 50 min) (P<0.05)] and a slower return of vagal tone, consistent with a significant increase in HR between modalities at all time points (P<0.05). These results suggest that training may limit the potential for an effective post-exertional hypotensive response to aerobic swimming. SN - 1470-8736 UR - https://www.unboundmedicine.com/medline/citation/23763298/Effects_of_moderate_intensity_aerobic_cycling_and_swim_exercise_on_post_exertional_blood_pressure_in_healthy_young_untrained_and_triathlon_trained_men_and_women_ L2 - http://clinsci.org/cgi/pmidlookup?view=long&amp;pmid=23763298 DB - PRIME DP - Unbound Medicine ER -