Posted on 07/05/2019 8:36:18 PM PDT by ConservativeMind
Researchers have found no evidence of elevated cardiac risk in runners who completed a 24-hour ultramarathon (24UM), despite the transient elevation of blood biomarkers that measure cardiac health. According to the study, trained runners were more likely than their novice counterparts to experience raised levels, reflecting the greater cardiac load and pituitary-adrenocortical response to extremely strenuous exercise.
"Experienced runners performed with greater intensity and speed, which placed strains on their hearts. Novice runners ran with less intensity, which resulted in lower cardiac biomarker levels," Runners with differences in training experience and competitive performances present variations in running speeds and, therefore, cardiac biomarker responses.
"The good news is that while experienced runners pushed their heart limits during the ultramarathon, they did not show evidence of cardiac risk assessed through elevated biomarkers," Prof. Hohl noted. "Novice runners appear to pace themselves well below their cardiac limit, self-selecting a safe pacing strategy for their hearts.
The study examined the relationship between self-selected exercise intensity with cardiac biomarkers comparing experienced and novice runners able to finish a 24UM. Biomarkers that measure necrosis, inflammation, cardiac function/injury, and ischemia were used to understand the impact of acute exercise on the cardiac health of runners with different training levels and performance, including cortisol, total creatine kinase, C-reactive protein, and leukocyte levels. The findings showed higher levels of cortisol in the experienced group and confirmed previous research that cortisol is a good predictor of speed during a 24UM.
"Our study provides evidence for caution and self-monitoring especially for experienced runners. After participating in an ultramarathon, runners should recover for at least two days before running any significant distance. This time is needed to normalize cardiac markers and allow the heart time to recover after such a challenge," cautioned Prof. Hohl.
(Excerpt) Read more at sciencedaily.com ...
It just feels like we will. 🙂
Do stay hydrated, don’t overheat and if doing a marathon, give your body two days to recover, though.
And dont freak out about puking or seeing puke on the marathon course. Its a common occurrence.
That study makes perfect sense to me - those cardiac blood markers are a secondary response to high heart activity.
So if you were just sitting on the couch and had those indicators it meant your heart suddenly went into overdrive for some reason and you’re gonna have a bad day.
But if you just ran a marathon - perfectly normal.
But it WILL mean that those who just ran a marathon and are having cardiac problems can’t be diagnosed from those markers.
That is a good point.
My ultramarathon is walking around the cul de sac.
Jim Fixx was not available for comment.
“Jim Fixx was not available for comment.”
The guy who smoked two packs a day and had bad genes?
Moderation is key. Triathlons and marathons to me are the equivalent of running your car across country every week redlining the RPM.
I am in awe of people who can run a marathon.
BTW, you probably know the origin of the race-—the Greek runner Phidipides was sent by the Greek General Miltiades after the battle of Marathon to, as the story goes, tell the Athenians the good news. Traditionally it’s held that he ran 26 miles. But many scholars think ol Phid ran to EVERY Greek town along the way before he got to Athens!
No wonder his heart exploded when he arrived to yell “Rejoice! We conquer!”
Interesting. Thanks!
I’ll drive.
Jim Fixx taught me to smoke cigarettes while I run. The nicotene enhances the exercise.
Other exercise enhancers I learned from the Jim Fixx fans is being a meth head, plus plenty of whiskey and vodka, drink liters of Coca Cola, and finally candy bars, plenty of candy bars make exercise efficient the Jim Fixx way.
I did an ultra marathon once watching Centennial, Lonesome Dove, The Ring Trilogy and The Hobbit with no change in cardio markers. However it did take two days to get my rear in gear again.
It is good to hear from you again!
“Jim Fixx taught me to smoke cigarettes while I run. The nicotene enhances the exercise.
Other exercise enhancers I learned from the Jim Fixx fans is being a meth head, plus plenty of whiskey and vodka, drink liters of Coca Cola, and finally candy bars, plenty of candy bars make exercise efficient the Jim Fixx way.”
Well the early Tour de France riders smoked and drank. And they still drink on the last day of the Tour. Whatever works!
I am not a runner, I am built like a thumb but if you can run 3 miles, you can run 50.
” if you can run 3 miles, you can run 50”
True. It just takes 17 days to do it...
I’m not a runner, I don’t “go out for a run”, I don’t enjoy running.
I’m in no danger of winner a race but I’ll run it.
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