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Are marathons bad for your health?
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Sport and exercise medicine
Are marathons bad for your health?
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News of the sudden death of 30 year old Claire Squires at the end of the London Marathon on Sunday has led to widespread shock,sympthay and donations to the Samaritans for whom she was running. Cause
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Forums  »  Open clinical  »  Sport and exercise medicine  »  Are marathons bad for your health?

Are marathons bad for your health?

posted at 24/4/2012 12:27 PM BST on bmj.com
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News of the sudden death of 30 year old Claire Squires at the end of the London Marathon on Sunday has led to widespread shock,sympthay and donations to the Samaritans for whom she was running. Cause of death of this fit, slim 30 year old hairdresser who had already run a marathon before, is still unknown.

So should we be advising patients to avoid extreme sports and marathon runnning? There have been 10 deaths during the London marathon since its inception in 1981 (no data on the week or so after).  The last death was in 2007 when a 22-year-old fitness instructor died of hyponatraemia,presumably due to overdrinking. Most fatalities are due to undiagnosed underlying heart problems (would that be conduction problems in the young?)

Given the numbers running, the fatality rate is reassuringly low. I suppose the question is whether an ecg to check for conduction defect and/ or echo to look for cardiomyopathy are worthwhile before embarking on training for a marathon. The pick up rate's going to be very low but is there any down side (apart from time,money and false reassurance)? Certainly, if there's a family history of sudden death, should we suggest investigations?

I've just run my first and last marathon at the age of 52. My dad dropped dead of a heart attack at 48 but I figured that if I didnt get any chest pain while training, I'd probably be ok. And I was.  
I didn't really consider having any checkups before. What do you think? Foolhardy or rational?

http://www.guardian.co.uk/sport/2012/apr/24/claire-squires-donations-london-marathon?newsfeed=true

Re: Are marathons bad for your health?

posted at 24/4/2012 1:18 PM BST on bmj.com
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First: 12/3/2010
Last: 21/5/2013
Well done Anne!
There are still nearly 2000 deaths a year from road accidents, but also still falling.
2001 3,450
2002 3,431
2003 3,508
2004 3,221
2005 3,201
2006 3,172
2007 2,946
2008 2,538
2009 2,222
2010 1,850

Should we tell people to stay at home, not drive, cycle or walk anywhere near a road and wear full body armour?

I suspect that like Fabrice Muamba and the maraton death you quoted, , most deaths associated with sport are due to occult dysrythmias, not ischaemia, or to the excessive heat and dyhydration demands on endurance athletes.   The resources required to detect the first would also be excessive, while the care and observation to prevnt the second might be, and I am sure have been, instituted in marathons.

John

Re: Are marathons bad for your health?

posted at 24/4/2012 1:22 PM BST on bmj.com
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First: 27/10/2011
Last: 20/5/2013
Hi Ann,

Firstly, congratulations on your first marathon.  It is a gargantuan effort and I'm sure positions you well to understand the duress the body is placed under before, during and after such trials.

There are a few intersting points here. Of course, the marvellous case of Fabrice Muamba highlights the stark contrast in possible outcomes. Tragic or miraculous, these are sensational stories for the media that distort the reality of the risks involved - expert, politically unmotivated and media-free opinion can be the only guide here...

But does knowing actually help? Are we able to predict those at risk accurately enough to avoid the psychologically and physically detrimental effects of knowing that if you push it too hard, you could die?

When I was at school, there was a boy in my house called Richard van Rossum who knew he had a deadly cardiac arrhythmia.  He had an internal defibrillator/pacing device.  He was a marvellous guy, full of spirit, and very active.  He played many sports and did so well.  And with all that, he collapsed and died running to a History lesson.  It was a huge shock, especially considering the circumstances, but something he and his family understood could happen.  His father, an Olympic hurdler, continued to coach at the school for a few years after his death, which was such a typically selfless gesture of the family and was hugely appreciated. 

What can you do?


Re: Are marathons bad for your health?

posted at 24/4/2012 1:23 PM BST on bmj.com
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Last: 20/5/2013
Not at all! The participants should undergo all the relevant routine check ups well before the performance.

Re: Are marathons bad for your health?

posted at 24/4/2012 1:25 PM BST on bmj.com
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First: 19/4/2010
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Good response, JohnD, as ever.

I'm training for IronMan triathlon.  An extreme event, for sure.  Anyone who is even considering long distance triathlon racing needs to know the risks of poor hydration/overhydration, poor nutrition, etc, and also how to train and race at the right intensities to reduce risk.

But no amount of planning can prevent an occult dysrhythmia.  

Who's to say that she wouldn't have had had the fatal arrhythmia whilst walking around TESCO?

Re: Are marathons bad for your health?

posted at 24/4/2012 5:14 PM BST on bmj.com
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First: 8/6/2011
Last: 19/5/2013
   One important point of the clinical examination is to examine and take ecg from both parents.

  I was a runner of long distances , But say the truth i never took place in a competition. Anyway  i was trainning or very early in the morning ( around 5-7 a.m) .or  in the   night (after 9 OO pm) . Becouse the wether was more pleasent for me at these times )   And as i was prefer to train in lonly places , now i am thinking that if i would have colapsed somewhere they would had  find me after many-many hours or even days...

Re: Are marathons bad for your health?

posted at 24/4/2012 5:23 PM BST on bmj.com
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 Corection :  weather . ( propably there are other mistakes also , but i hope that you will tolerate me until i perfect my english )

Re: Are marathons bad for your health?

posted at 25/4/2012 10:46 AM BST on bmj.com
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In Response to Re: Are marathons bad for your health?:
 Corection :  weather . ( propably there are other mistakes also , but i hope that you will tolerate me until i perfect my english )
Posted by ikaros


Great to see the discussion. This is a topic we grapple with at the BMJ. Clearly the benefits of physical activity greatly outweigh the slightly increased risk of sudden death while exercising. In older people the most common causes of sudden death are ischaemic heart disease in contrast to those in younger people. In Italy, sports club members need to be screened. In France, you need to provide a note/certificate to say you are fit to exercise (How a doctor decides is another issue!). In the UK, you just turn up. Should people be screened? See some of the stuff in the BMJ: 

Clinical Review

Preparticipation screening for cardiovascular abnormalities in young competitive athletes

Michael Papadakis, Greg Whyte, Sanjay Sharma

BMJ 2008;337:a1596 (Published 29 September 2008)


Research

Cardiovascular evaluation, including resting and exercise electrocardiography, before participation in competitive sports: cross sectional study

Francesco Sofi, Andrea Capalbo, Nicola Pucci, Jacopo Giuliattini, Francesca Condino, Flavio Alessandri, Rosanna Abbate, Gian Franco Gensini, Sergio Califano

BMJ 2008;337:a346 (Published 03 July 2008)

...of such cardiovascular screening on reducing sudden death...participants with a positive screening result are not available...some potentially fatal cardiac diseases such as coronary...Cardiovascular pre-participation screening of young competitive...

Head to Head

Can electrocardiographic screening prevent sudden death in athletes? Yes

Antonio Pelliccia, Domenico Corrado

BMJ 2010;341:c4923 (Published 14 September 2010)

...electrocardiographic screening prevent sudden death...2 Department of Cardiac, Thoracic and Vascular...electrocardiographic screening of athletes would...evidence suggests that screening with electrocardiography...the risk of sudden cardiac death in young athletes

Editorial

Sudden cardiac death in young athletes

Jonathan A Drezner, Karim Khan

BMJ 2008;337:a309 (Published 03 July 2008)

...supports a systematic screening programme before...risk for sudden cardiac death is a highly...pre-participation screening programme for all...examination, and screening electrocardiography...Board for the Sudden Cardiac Arrest Association...


Re: Are marathons bad for your health?

posted at 25/4/2012 3:23 PM BST on bmj.com
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First: 13/4/2010
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I do have problems with the concept of road running per se (as opposed to running on fields, beaches or forestry tracks) bcause I think, even with the best training shoes, you are doing repeated damage to you ankles, knees, hips and lumbar spine which will come back to haunt you.
I know it from first hand experience. I spent my youth playing football, tennis, squash, volleyball, basket ball, etc. on an almost daily basis but almost always on hard surface such as clay. Now in my late 40s my knees and hips hurt :-(
I don't run myself (my sore knees and hips now prefer yoga and non-weighbearing activities like swimming) but I am led to believe by friends who do run seriously that you should change your running shoes every 8 weeks if you are a serious runner otherwise all their support has gone. But in reality how many folks do that? Certainly none of my running friends do!

Re: Are marathons bad for your health?

posted at 25/4/2012 9:26 PM BST on bmj.com
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First: 25/4/2012
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Here is an answer to the question about what the causes are of Sudden Cardiac Death in the Young (it's from BJSM (Br J Sports Med) http://tiny.cc/e97bdw


A broad spectrum of cardiac and non-cardiac causes, both congenital and acquired, have been implicated in causing SCA in athletes. Data from the USA and Italy indicate that structural cardiac disease accounts for 60–95% of the causes of SCA,21,,23 and mainly includes hypertrophic cardiomyopathy, arrythmogenic right ventricular dysplasia and congenital coronary artery anomalies in the under-35-year-old group. 

Coronary artery disease predominates in the over-35-year-old group. Common pathway in all these conditions is ventricular fibrillation (VF) as the main presenting rhythm in SCA.24

In the under-16-year-old age group, commotio cordis (cardiac contusion) is thought to be responsible for up to 20% of SCAs. It is very uncommon after 21 years of age.25 26.

Other cardiac causes of SCA include myocarditis, ruptured aortic aneurysm, aortic valve stenosis, mitral valve prolapse, dilated cardiomyopathy, drug-induced cardiac arrhythmias and the ion-channelopathies29 which include the long and short QT syndrome (caused by sodium or potassium ion channel genetic mutations), Brugada syndrome (defective sodium channel gene) and familial catecholaminergic polymorphic ventricular tachycardia30 (abnormal ryanodine receptor regulating calcium release). Non-cardiac causes of SCA include asthma, heat stroke, cerebral artery rupture and exertional rhabdomyolysis secondary to sickle cell trait.               

via Karim Khan, MBBS, PhD - editor, BJSM               

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