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Is HILT bad for your heart?

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Weight & Resistance Training

' Forum started by Wobbles, Aug 13th, 2014 at 19:17 PM.
Aug 13th, 2014, 19:17 PM  
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Is HILT bad for your heart?

I heard this mentioned somewhere a while ago but read some information today I thought I'd share.

High intensity interval training has the benefits of fat and calorie burning in short bursts of intense exercise.

Dr James Morton who is a exercise metabolism lecturer at Liverpool John Moores university says HILT is better for the heart as it increase the amount of blood your heart pumps per beat. As HILT spikes your blood the advice is to avoid caffeine.

Sep 24th, 2015, 00:46 AM  
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Join Date: Sep 2015
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Provided one doesn't suffer from a pre-existing heart condition, or other contra-indication, preventing them from undertaking HIIT, the activity should be safe for the vast majority. Those in doubt should consult their GP/Physician.

Concerning the claims made by Dr Morton, he is indeed correct in his suggestion that HIIT increases the function of the heart, due to the improved mitochondrial activity that takes place within the muscle itself during HIIT exercise.

As such, the improved mitochondrial function of the heart (through HIIT) leads to an improvement in cardiac output and contractile function (the ability to pump more blood), also leading to a reduction in one's heart rate.

Although steady state cardio benefits the cardiovascular system, unlike HIIT, it doesn't increase mitochondrial activity in the heart. However, SSC still reaps the benefits of regular HIIT as one's exercise economy improves, therefore increasing their endurance.
Dec 28th, 2015, 21:30 PM  
SoSlim Rising Star
Join Date: Nov 2014
Location: Manchester, UK
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Hi, I read the major benefit of Hiit, especially for very morbidly obese people is that, it alters you genetically by activating parts of what is often a dormant survival system. Hiit essentially mimics situations that would occur in nature where short bursts of speed would get you away from a predators attacks then you would be moving out of its hunting ground dodging situations. Different genes activate as this becomes regular to tell your body not to store too much fat as 'movement is survival'. Your metabolism starts working again properly and in people who are largely sedentary this can often be the key to unlocking large weight loss. I think however the real life 'fight or flight' situations that can put massive stress on your body would effect your heart. But Hiit is controlled so should be system shock of a much lower magnitude. ( As an aside roller coaster rides and other thrill seeking activities as well as nature walks or even zoo visits can often help activate this system as well )
There are obviously other switched on/off or more like dimmered survival systems that interfere like weight gain to protect from cold or fat as a surplus, where there is a possibility of food shortage. Like crash gaining weight after diets. They did a twins study years ago that showed the cold one can be jammed on by things like emotional loss. Highlighted the difference in dna from a time when the obese twin had suffered, for example the death of a friend or gone through some emotional event that hadn't been dealt with. While the 'normal' twin living a similar lifestyle had not and had not started gaining weight. All the info is on the web for people looking to deal with large weight loss but I recommend looking at work by a guy called Jon Gabriel. He explains a lot of the science much better than I can and has the documentary evidence from research that I cannot be bothered writing out
Hope everyone has had an awesome Christmas. Good luck with whatever you are trying.
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