Nick Krontiris Profile picture
May 19, 2023 20 tweets 6 min read Read on X
The findings of this study suggest sport-specific cardiac adaptations. Image
- Prolonged QT dispersion derived from electrocardiograms has been used as an indicator of abnormal ventricular repolarization for several cardiac diseases.
- An increased QT dispersion has been documented in patients with arterial hypertension and left ventricular hypertrophy.
- In addition to clinical environments, left ventricular hypertrophy is observed in athletes completing regular training.
- This left ventricular hypertrophic cardiac response serves as a reactive mechanism to compensate for volume overload experienced during endurance training or pressure overload experienced during resistance training.
- Although athletes develop impressive left ventricular tissue growth, it is unknown whether this exercise-induced left ventricular hypertrophy is associated with increased QT dispersion as observed in patients with hypertensive myocardial hypertrophy.
- Despite evidence suggesting that cardiac remodeling varies in response to pressure overload (concentric hypertrophy) or volume overload (eccentric hypertrophy)...
...there is limited research on comparing QT dispersion and echocardiographic parameters across athletes competing in different sports varying in terms of the predominant type of overload imposed.
- In this way, sports may be classified according to the mechanical demands they elicit based on the peak static components (expressed as relative intensity of voluntary muscular contraction across three levels [A, B, C])...
...and the peak dynamic components (expressed as percentage of maximal oxygen uptake across three levels [I, II, III]) undertaken by athletes.
- This study aimed to compare QT dispersion and echocardiographic parameters between athletes competing in different sports and sedentary controls and assess the associations between QT dispersion and echocardiographic parameters among them.
- Advanced left ventricular hypertrophy, predominantly concentric in nature, induced by pressure overload, accompanied with an increased QT dispersion was observed in athletes predominantly completing static exercise (powerlifters and bodybuilders).
"These structural parameters we observed in powerlifters and bodybuilders represent remodeling adaptations in response to training that fall within a 'grey zone'...
"...where extreme expressions of athlete’s heart and mild morphological forms of hypertrophic cardiomyopathy may overlap...
"...Although these likely remodeling adaptations in powerlifters and bodybuilders mimic pathological hypertrophic cardiomyopathy, their LV end-diastolic diameters (~ 52–53 mm) were within clinically accepted partition values for the general population (45–55 mm)...
"...which is a useful and sensitive marker in distinguishing an athletic heart from hypertrophic cardiomyopathy diagnosis."
- On the other hand, mild left ventricular hypertrophy (toward the upper threshold of the normal reference range) induced by volume overload that was accompanied with a reduced QT dispersion was observed in long-distance runners, volleyball athletes, and football athletes.
"In addition to LV structural parameters, LV systolic indicators were also within clinically accepted reference ranges for the general population...
"...further supporting adaptive (rather than maladaptive) physiological cardiac remodeling in athlete groups predominantly undertaking dynamic (long-distance runners, football athletes, and volleyball athletes) or static exercise (powerlifters and bodybuilders)."
Sport-related differences in QT dispersion and echocardiographic parameters in male athletes (open access)

doi.org/10.1038/s41598…

#exercise #fitness #fit #FitFam #FitLife #FitnessAddict #Workout #TrainHard #GymLife #GymTime #muscle #strength #lift #GetStrong #cardio #hiit

• • •

Missing some Tweet in this thread? You can try to force a refresh
 

Keep Current with Nick Krontiris

Nick Krontiris Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @nick_krontiris

Apr 18
The findings of this one indicate that acute exercise-induced increases in circulating serum BDNF may be solely a result of increased platelet count, probably due to splenic platelet release. Image
- Brain-derived neurotrophic factor (BDNF) belongs to the family of neurotrophins and stimulates neuronal growth and differentiation, synaptogenesis, and neural plasticity.
- It is synthesized as an isoform termed pro-BDNF, which can be cleaved, both intra- and extracellularly, to the mature BDNF (mBDNF or conventionally just BDNF).
Read 10 tweets
Apr 11
This one indicates that 7 years of reduced training are not enough to reverse exercise-induced left atrial enlargement in former elite endurance athletes. Image
- The objective of this study was to evaluate the effects of long-term reduced training on the left atrium in elite endurance athletes and to elucidate sex-specific differences in left atrial detraining patterns.
- In this long-term longitudinal echocardiographic study of 50 active elite endurance athletes, a follow-up examination was performed 7 years after retirement from the elite program.
Read 7 tweets
Apr 11
This systematic review and meta-analysis finds that advancing age is not concomitant with greater symptoms of exercise-induced muscle damage (EIMD). Image
- The aim of this paper was to undertake a systematic review and meta-analysis comparing exercise-induced muscle damage (EIMD) in older and younger adults.
- Results indicated that muscle soreness is likely to be smaller in older compared to younger individuals after muscle damaging exercise.
Read 8 tweets
Apr 6
This one found a non-linear association between physical activity and the risk of type 2 diabetes in Korean adults, with the optimal physical activity amount at 1,028 MET-min/week. Image
- This study investigated the relationship between the type 2 diabetes prevalence and intensity, frequency, and metabolic equivalent of task (MET) score of physical activity in in 2,428,448 participants included in the Korea Community Health Survey.
- In this study, physical activity up to approximately 1,000 MET-min/week, was associated with lower type 2 diabetes prevalence.
Read 7 tweets
Apr 5
The findings of this one suggest that sarcosthenia, that is, intrinsic muscle weakness, is an effective cause of age-related power declines in addition to sarcopenia and fat accumulation. Image
- Age-related deterioration in muscle volume, intramuscular fat content and muscle function can be modulated by physical activity.
- This study explored whether Masters athletes, as examples of highly physically active people into old age, could prevent these age-related muscle deteriorations.
Read 11 tweets
Mar 30
In this one, a “weekend warrior” pattern of physical activity (i.e. concentrated within 1 to 2 days) was associated with a reduced dementia risk, regardless of sedentary behaviour duration. Image
- This prospective study used data from the UK Biobank cohort, which provided accelerometer-based physical activity data for a full week from February 2013 to December 2015.
- Participants were categorized into “weekend warriors” group, engaged in more than 50% moderate to vigorous physical activity (≥ 150 min/week) on 1 to 2 days, inactive group (total moderate to vigorous physical activity < 150 min/week)...
Read 8 tweets

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Don't want to be a Premium member but still want to support us?

Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal

Or Donate anonymously using crypto!

Ethereum

0xfe58350B80634f60Fa6Dc149a72b4DFbc17D341E copy

Bitcoin

3ATGMxNzCUFzxpMCHL5sWSt4DVtS8UqXpi copy

Thank you for your support!

Follow Us!

:(