Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

The impact of exercise modality and menstrual cycle phase on circulating cardiac troponin T.

Nie, J, Zhang, H, Kong, Z, Wang, C, Liu, Y, Shi, Q and George, KP The impact of exercise modality and menstrual cycle phase on circulating cardiac troponin T. Journal of Science and Medicine in Sport. ISSN 1878-1861 (Accepted)

[img] Text
The impact of exercise modality and menstrual cycle phase on circulating cardiac troponin T.pdf - Accepted Version
Restricted to Repository staff only
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (984kB)

Abstract

OBJECTIVES: It is unclear whether exercise modality (moderate-intensity continuous [MCE]; high-intensity interval [HIE]) and menstrual cycle phase (follicular [FP]; luteal [LP]), individually or in combination, mediate the commonly observed exercise-induced elevation in cardiac troponin T (cTnT). This study examines cTnT responses to MCE and HIE during both the FP and LP. DESIGN: Randomised crossover study. METHODS: Seventeen healthy, eumenorrheic women completed four trials including MCE (60% VO2max steady-state cycling until 300kJ) and work-equivalent HIE (repeated 4-min cycling at 90% VO2max interspersed with 3-min rest) during both the FP and LP. The FP and LP were verified based on ovarian hormones. Serum cTnT was assessed using a high-sensitivity assay before, immediately after, and 1 (1HR), 3 (3HR) and 4 (4HR) hours after exercise. cTnT values were corrected for plasma volume changes. RESULTS: cTnT was significantly elevated (p<0.05) post-exercise in both MCE (at 3HR and 4HR) and HIE (at 1HR, 3HR and 4HR). No statistically significant difference (p>0.05) in peak post-exercise cTnT, which mostly occurred at 3HR, was seen among the four trials (median [range], ngl-1: 5.2 [1.7-18.1] after MCE during FP; 4.8 [1.7-24.9] after MCE during LP, 8.2 [3.9-24.8] after HIE during FP and 6.9 [1.7-23.1] after HIE during LP). CONCLUSIONS: A single 300kJ bout of both MCE or HIE resulted in a significant post-exercise increase in cTnT, with no differences in peak cTnT response between menstrual cycle phases or between exercise modes, but the cTnT elevation occurs slightly earlier after HIE.

Item Type: Article
Uncontrolled Keywords: 1106 Human Movement and Sports Sciences, 1117 Public Health and Health Services
Subjects: R Medicine > RC Internal medicine > RC1200 Sports Medicine
R Medicine > RG Gynecology and obstetrics
Divisions: Sports & Exercise Sciences
Publisher: Elsevier
Related URLs:
Date Deposited: 08 Nov 2019 12:22
Last Modified: 08 Nov 2019 12:30
DOI or Identification number: 10.1016/j.jsams.2019.10.003
URI: http://researchonline.ljmu.ac.uk/id/eprint/11738

Actions (login required)

View Item View Item