Acute effect of intermittent and continuous aerobic exercise on release of cardiac troponin T in sedentary men
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Acute effect of intermittent and continuous aerobic exercise on release of cardiac troponin T in sedentary men. / Ranjbar, Rouhollah; Ahmadi, Mohammad Amin; Zar, Abdossaleh; Krustrup, Peter.
I: International Journal of Cardiology, Bind 236, 2017, s. 493-497.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Acute effect of intermittent and continuous aerobic exercise on release of cardiac troponin T in sedentary men
AU - Ranjbar, Rouhollah
AU - Ahmadi, Mohammad Amin
AU - Zar, Abdossaleh
AU - Krustrup, Peter
N1 - CURIS 2017 NEXS 032
PY - 2017
Y1 - 2017
N2 - BACKGROUND: Studies have shown that acute exercise can increase serum concentrations of cardiac biomarkers, including cardiac troponin T (cTnT). We investigated the acute effects of intermittent (IE) and continuous (CE) exercise at the same cardiac workload on myocardial necrosis biomarkers in sedentary men.METHODS: Eleven sedentary healthy men aged 22.3±1.9years completed the study. The subjects were divided into two groups and performed, in random order, IE (intensity alternating between 50% (2min) and 80% (1min) HRreserve) or CE (60% HRreserve). The study was designed as a single-blinded randomised crossover trial performed on two distinct experimental days separated by a 1-week washout period. Each session consisted of 40min of aerobic exercise, either IE or CE, on a treadmill. Blood samples were taken before (PRE), immediately after (POST) and 1h after (POST-1) each exercise session.RESULTS: hs-cTnT significantly increased immediately after exercise in both protocols and remained elevated at POST-1 (P<0.05). There was no significant difference between POST and POST-1 values(P>0.05). Neither CE nor IE caused any significant change in CK-MB (P>0.05). The results also showed that HR and RPP increased significantly following both exercise protocols (P=0.001).CONCLUSIONS: In summary, both CE and IE results in increased serum concentrations of hs-cTnT in sedentary men. However, this increase does not seem to be caused by the irreversible death of cardiomyocytes. CE resulted in a greater hs-cTnT concentration than IE.
AB - BACKGROUND: Studies have shown that acute exercise can increase serum concentrations of cardiac biomarkers, including cardiac troponin T (cTnT). We investigated the acute effects of intermittent (IE) and continuous (CE) exercise at the same cardiac workload on myocardial necrosis biomarkers in sedentary men.METHODS: Eleven sedentary healthy men aged 22.3±1.9years completed the study. The subjects were divided into two groups and performed, in random order, IE (intensity alternating between 50% (2min) and 80% (1min) HRreserve) or CE (60% HRreserve). The study was designed as a single-blinded randomised crossover trial performed on two distinct experimental days separated by a 1-week washout period. Each session consisted of 40min of aerobic exercise, either IE or CE, on a treadmill. Blood samples were taken before (PRE), immediately after (POST) and 1h after (POST-1) each exercise session.RESULTS: hs-cTnT significantly increased immediately after exercise in both protocols and remained elevated at POST-1 (P<0.05). There was no significant difference between POST and POST-1 values(P>0.05). Neither CE nor IE caused any significant change in CK-MB (P>0.05). The results also showed that HR and RPP increased significantly following both exercise protocols (P=0.001).CONCLUSIONS: In summary, both CE and IE results in increased serum concentrations of hs-cTnT in sedentary men. However, this increase does not seem to be caused by the irreversible death of cardiomyocytes. CE resulted in a greater hs-cTnT concentration than IE.
KW - Faculty of Science
KW - Intermittent exercise
KW - Continuous exercise
KW - Cardiac troponin T
KW - CK-MB
U2 - 10.1016/j.ijcard.2017.01.065
DO - 10.1016/j.ijcard.2017.01.065
M3 - Journal article
C2 - 28096042
VL - 236
SP - 493
EP - 497
JO - International Journal of Cardiology
JF - International Journal of Cardiology
SN - 0167-5273
ER -
ID: 172129472