Rafel Cirer-Sastre1, Alejandro Legaz-Arrese2, Francisco Corbi3, Isaac López-Laval2, Keith George4, Joaquín Reverter-Masia5. 1. National Institute of Physical Education of Catalonia (INEFC), Universitat de Lleida (UdL), Spain; Grup de Recerca Moviment Humà, Universitat de Lleida (UdL), Spain. Electronic address: rcirer@inefc.es. 2. Section of Physical Education and Sports, University of Zaragoza, Spain. 3. National Institute of Physical Education of Catalonia (INEFC), Universitat de Lleida (UdL), Spain; Grup de Recerca Moviment Humà, Universitat de Lleida (UdL), Spain. 4. Research Institute for Sport and Exercise Sciences, School of Sport and Exercise Sciences, Liverpool John Moores University, United Kingdom. 5. Grup de Recerca Moviment Humà, Universitat de Lleida (UdL), Spain; Section of Physical Education, Universitat de Lleida (UdL), Spain.
Abstract
OBJECTIVES: To determine the influence of maturational status on the release of cardiac troponin T (cTnT) induced by a bout of 30min, high-intensity, continuous exercise. DESIGN: Quasi-experimental, cross-sectional study. METHODS: Seventy male, young, well trained swimmers (age range 7-18 years, training experience 1-11 years) were classified by maturational stages: Tanner stage I (n=14), II (n=15), III (n=15), IV (n=13), and V (n=13). Participants underwent a distance-trial of 30min continuous swimming, and cTnT was measured before, immediately after and 3h after exercise. Changes in cTnT over time were compared among groups, and associated with exercise load. RESULTS: Basal cTnT was higher in Tanner-V (3.8-8.1ng/L) compared with I (1.5-5.5ng/L, p<0.001), II (1.5-4.5ng/L, p<0.001) and III (1.5-6.8ng/L, p=0.003), and in IV (1.5-6.3ng/L) compared with II (p=0.036). Maximal elevations of cTnT from baseline were notable (p<0.001) and comparable among maturational stages (p=0.078). The upper reference limit for myocardial injury was exceeded in 35.7% of the participants, without differences among groups (p=0.18). Baseline cTnT correlated with participant characteristics, and maximal cTnT elevations from baseline with exercise internal load (%HRpeak, rs=0.34, p= 0.003; %HRmean, rs=0.28, p=0.02). CONCLUSIONS: Maturational status influences positively absolute pre- and post-exercise cTnT but not its elevation after a bout of 30min, high-intensity, continuous exercise.
OBJECTIVES: To determine the influence of maturational status on the release of cardiac troponin T (cTnT) induced by a bout of 30min, high-intensity, continuous exercise. DESIGN: Quasi-experimental, cross-sectional study. METHODS: Seventy male, young, well trained swimmers (age range 7-18 years, training experience 1-11 years) were classified by maturational stages: Tanner stage I (n=14), II (n=15), III (n=15), IV (n=13), and V (n=13). Participants underwent a distance-trial of 30min continuous swimming, and cTnT was measured before, immediately after and 3h after exercise. Changes in cTnT over time were compared among groups, and associated with exercise load. RESULTS: Basal cTnT was higher in Tanner-V (3.8-8.1ng/L) compared with I (1.5-5.5ng/L, p<0.001), II (1.5-4.5ng/L, p<0.001) and III (1.5-6.8ng/L, p=0.003), and in IV (1.5-6.3ng/L) compared with II (p=0.036). Maximal elevations of cTnT from baseline were notable (p<0.001) and comparable among maturational stages (p=0.078). The upper reference limit for myocardial injury was exceeded in 35.7% of the participants, without differences among groups (p=0.18). Baseline cTnT correlated with participant characteristics, and maximal cTnT elevations from baseline with exercise internal load (%HRpeak, rs=0.34, p= 0.003; %HRmean, rs=0.28, p=0.02). CONCLUSIONS: Maturational status influences positively absolute pre- and post-exercise cTnT but not its elevation after a bout of 30min, high-intensity, continuous exercise.
Authors: Rafel Cirer-Sastre; Francisco Corbi; Isaac López-Laval; Luis Enrique Carranza-García; Joaquín Reverter-Masià Journal: Int J Environ Res Public Health Date: 2021-02-01 Impact factor: 3.390
Authors: Feifei Li; Will G Hopkins; Xuejing Wang; Julien S Baker; Jinlei Nie; Junqiang Qiu; Binh Quach; Kun Wang; Longyan Yi Journal: Front Physiol Date: 2021-03-26 Impact factor: 4.566