Editing Exercise physiology (section)

== Cardiac biomarkers ==
Prolonged exercise such as marathons can increase [[Cardiac marker|cardiac biomarkers]] such as [[troponin]], [[Brain natriuretic peptide|B-type natriuretic peptide]] (BNP), and ischemia-modified (aka MI) [[albumin]]. This can be misinterpreted by medical personnel as signs of [[myocardial infarction]], or [[Acute coronary syndrome|cardiac dysfunction]]. In these clinical conditions, such cardiac biomarkers are produced by irreversible injury of muscles. In contrast, the processes that create them after strenuous exertion in endurance sports are reversible, with their levels returning to normal within 24-hours (further research, however, is still needed).<ref>{{Cite journal |last=Scharhag |first=J |last2=George |first2=K |last3=Shave |first3=R |last4=Urhausen |first4=A |last5=Kindermann |first5=W |year=2008 |title=Exercise-associated increases in cardiac biomarkers |journal=Medicine & Science in Sports & Exercise |volume=40 |issue=8 |pages=1408–15 |doi=10.1249/MSS.0b013e318172cf22 |pmid=18614952 |doi-access=free}}</ref><ref>{{Cite journal |last=Lippi |first=G |last2=Schena |first2=F |last3=Salvagno |first3=GL |last4=Montagnana |first4=M |last5=Gelati |first5=M |last6=Tarperi |first6=C |last7=Banfi |first7=G |last8=Guidi |first8=GC |year=2008 |title=Influence of a half-marathon run on NT-proBNP and troponin T |journal=Clinical Laboratory |volume=54 |issue=7–8 |pages=251–4 |pmid=18942493}}</ref><ref>{{Cite news |last=Kolata |first=Gina |date=2008-11-27 |title=The Lab Says Heart Attack, but the Patient Is Fine |url=https://www.nytimes.com/2008/11/27/health/nutrition/27best.html |access-date=2023-02-08 |work=The New York Times |language=en-US |issn=0362-4331}}</ref>