[NMCycling] For health benefits, there is no upper bound on aerobic exercise

[John Vance via Bike-racers]

So, I found this:
https://academic.oup.com/eurheartj/article-pdf/34/47/3624/17354170/eht188.pdf
<https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=2ahUKEwjo_am6_preAhUkITQIHcUoB7kQFjABegQIBxAB&url=https%3A%2F%2Facademic.oup.com%2Feurheartj%2Farticle-pdf%2F34%2F47%2F3624%2F17354170%2Feht188.pdf&usg=AOvVaw2eqHQ9zK8Kc-dNNn6Ax_KZ>

The overall risk of arrythmias was 18 cases per 10,000 years at risk.  The
hazard ratio for the fastest or most frequently competing was 1.3.  The
endpoint was not death, but rather cases of arrythmia.  There was NO
association found with cases of cardiac arrest or sudden cardiac death vs
frequently competing or being a faster finisher.

> We did not observe higher incidence of sudden cardiac death with higher
number of completed races or finishing time, but again it must be stressed
that this study does not compare with the normal population. We have
previously shown that participants in *Vasaloppet* have lower mortality
than the general population and that mortality decreases with increasing
number of races.

On Mon, Oct 22, 2018 at 12:52 PM Bob Perls <perlsbob at gmail.com> wrote:

> I will look at it for sure, interesting.  But it is not about elite vs.
> not elite, rather intensity and duration over many decades.  Perfect
> correlation of higher finishers in 50km XC skiing events and death by MI
> for Sudden Cardiac Death (arrhythmias).  In other words, the more you train
> and the more intense the training over decades for long endurance events,
> the greater the likelihood of death.  A classic inverted U shaped curve
> where about 3 hours in  duration seems to be the longest average training
> and racing sessions ought to be.  These studies were self-reported, rather
> end points were death.
>
> If this study contradicts this previous data, should be interesting.
>
> Bob Perls
> www.unitenm.us
>
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> On Oct 22, 2018, at 12:27 PM, John Vance <adogapanicinapagoda at gmail.com>
> wrote:
>
> This study, unlike previous ones, measured fitness objectively with a
> treadmill test instead of basing it on self reporting.  This eliminated the
> people who count 3 hours of house cleaning and personal care as exercise.
> Their "elite" level subjects were people capable of 5 to 6 minute miles,
> and they showed continuing mortality improvement all the way up to these
> elite performers
>
> The link to the actual study is in the first paragraph.  Look at the size
> of effect - it's huge from low fitness to elite.  It's still significant
> between high fitness and elite.  Look at Table 2 for the fitness cutoffs
> measured in METs.
>
> On Mon, Oct 22, 2018 at 12:10 PM Bob Perls <perlsbob at gmail.com> wrote:
>
>> Certainly “The Haywire Heart” written by an electrophysiologist and a
>> cycling coach indicates that 3 hours seems to be the break point beyond
>> which repeated high level efforts result in diminishing marginal gains and
>> probably has an adverse effect long term on mortality and morbidity.
>>
>> Bob Perls
>> www.unitenm.us
>>
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>> On Oct 22, 2018, at 11:42 AM, John via Bike-racers <
>> bike-racers at mailman.swcp.com> wrote:
>>
>> Viewed an interesting Ted Talk about how High Intensity/Competitive
>> training can cancel out any gains made to longevity.  Seems moderation is
>> key or until the next study comes out….
>>
>> https://www.youtube.com/watch?v=Y6U728AZnV0
>>
>>
>> *From:* Bike-racers <bike-racers-bounces at mailman.swcp.com> *On Behalf
>> Of *John Vance via Bike-racers
>> *Sent:* Monday, October 22, 2018 11:17 AM
>> *To:* Bike Racers <bike-racers at swcp.com>
>> *Subject:* [NMCycling] For health benefits, there is no upper bound on
>> aerobic exercise
>>
>>
>> https://www.cnn.com/2018/10/19/health/study-not-exercising-worse-than-smoking/index.html?no-st=1540215967
>>
>> There are two takeaways from this study.  First, being inactive really is
>> deadly, and second, there is no risk associated with the levels of exercise
>> we engage in.  In fact, health benefits continue to increase the more you
>> exercise:
>>
>> >There does not appear to be an upper limit of aerobic fitness above
>> which a survival benefit is no longer observed. These results are in
>> concordance with previous observational studies35-38 of highly active
>> cohorts and other large, longitudinal studies4,6 of CRF and mortality but
>> are notably discrepant from population-based studies24-26 of physical
>> activity and exercise. This difference may reflect the objective
>> measurement of physical fitness in the present study, as opposed to
>> self-reported activity levels, which have been a major limitation of prior
>> studies.
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>
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