Beneficial Effects Of Exercise Research Articles

Significantly Lower Physical Activity Participation in Individuals with Chronic Pancreatitis Compared to Controls: An Exploratory Study of Objectively Assessed Physical Activity Levels

Introduction: The beneficial effects of exercise and physical activity (PA) have been demonstrated in many chronic inflammatory diseases. Knowledge on PA levels is unknown in the chronic pancreatitis population, and there are currently no specific PA recommendations for this condition. Methods: PA was measured objectively over a 7-day period in 17 individuals with chronic pancreatitis using an accelerometer (ActiGraph) and in 15 controls, matched for age, sex, and body mass index. Results: Participants with chronic pancreatitis spent a significantly lower amount of time in moderate, light, and moderate/vigorous activity compared to the healthy control group. Mean time in light activity in the chronic pancreatitis group was 825.4 ± 972 (standard deviation [SD]) compared to 1,500 ± 958 (SD) in the healthy control group. Moderate activity mean minutes were 61.6 ± 85 in the chronic pancreatitis group compared to 161.4 ± 131.2 in the healthy control group. Moderate/vigorous mean minutes were 62.1 ± 86 (SD) in the chronic pancreatitis group compared to 164.3 ± 132 (SD) in the healthy control group. There was no significant difference found between the groups for either vigorous activity or time spent sedentary. Conclusion: This exploratory study offers early objective evidence that activity levels in the chronic pancreatic group are not meeting current international recommendations. Further investigation of this chronic illness population is strongly recommended.

Proteomic profiling of protein expression changes after 3 months-exercise in ESRD patients on hemodialysis

The prevalence of chronic kidney disease (CKD) is steadily increasing, and it is a global health burden. Exercise has been suggested to improve physical activity and the quality of life in patients with CKD, eventually reducing mortality. This study investigated the change in physical performance after exercise in dialysis-dependent patients with CKD and analyzed differentially expressed proteins before and after the exercise. Plasma samples were collected at enrollment and after 3 months of exercise. Liquid chromatography with tandem mass spectrometry analysis and data-independent acquisition results were analyzed to determine the significantly regulated proteins. A total of 37 patients on dialysis were recruited, and 16 were randomized to exercise for 3 months. The hand grip strength and the walking speed significantly improved in the exercise group. Proteome analysis revealed 60 significantly expressed proteins after 3 months of exercise. In the protein functional analysis, the significantly expressed proteins were involved in the immune response. Also, some of the key significantly expressed proteins [(M Matrix metallopeptidase 9 (MMP-9), Activin A Receptor Type 1B (ACVR1B), Fetuin B (FETUB)] were validated via an enzyme-linked immunosorbent assay. Our results showed that exercise in dialysis-dependent patients with CKD could improve their physical performance. These results indicated that this beneficial effect of exercise in these populations could be associated with immune response.

Oral pyruvate prevents high-intensity interval exercise-induced metabolic acidosis in rats by promoting lactate dehydrogenase reaction.

There is no denying the clinical benefits of exogenous pyruvate in the treatment of pathological metabolic acidosis. However, whether it can prevent exercise physiological metabolic acidosis, delay the occurrence of exercise fatigue, and improve the beneficial effects of exercise and its internal mechanism remain unclear. We randomly divided 24 male SD rats into 3 groups: one group was a control without exercise (CC, n = 8), and the other two groups were supplemented with 616 mg/kg/day pyruvate (EP, n = 8) or distilled water of equal volume (EC, n = 8). These groups completed acute high-intensity interval exercise (HIIE) after 7 days of supplementation. The acid metabolism variables were measured immediately after exercise including blood pH (pHe), base excess (BE), HCO3 -, blood lactic acid and skeletal muscle pH (pHi). The redox state was determined by measuring the oxidized coenzyme I/reduced coenzyme I (nicotinamide adenine dinucleotide [NAD+]/reduced NAD+ [NADH]) ratio and lactate/pyruvate (L/P) ratio. In addition, the activities of lactate dehydrogenase A (LDHA), hexokinase (HK), phosphofructokinase (PFK) and pyruvate kinase (PK) were determined by ELISA. Pyruvate supplementation significantly reversed the decrease of pHe, BE, HCO3 - and pHi values after HIIE (p < 0.001), while significantly increased the activities of LDHA (p = 0.048), HK (p = 0.006), and PFK (p = 0.047). Compared with the CC, the NAD+/NADH (p = 0.008) ratio and the activities of LDHA (p = 0.002), HK (p < 0.001), PFK (p < 0.001), and PK (p = 0.006) were significantly improved in EP group. This study provides compelling evidence that oral pyruvate attenuates HIIE-induced intracellular and extracellular acidification, possibly due to increased activity of LDHA, which promotes the absorption of H+ in the LDH reaction. The beneficial effects of improving the redox state and glycolysis rate were also shown. Our results suggest that pyruvate can be used as an oral nutritional supplement to buffer HIIE induced metabolic acidosis.

SESN2 ablation weakens exercise benefits on resilience of gut microbiota following high-fat diet consumption in mice

Gut dysbiosis is associated with several pathological processes. Previous study showed that regular exercise can protect against dysmetabolism in high-fat diet (HFD) fed mice through butyrate-SESN2 pathway, and SESN2 ablation weakened the protective effects of exercise. Here, we investigated whether SESN2-deficiency suppresses the exercise response to microbiota composition and subsequently reduces the benefits of exercise on dysmetabolism induced by HFD. Wild type (WT) and SESN2−/− mice were assigned to five-groups, fed with either normal chow or HFD and with or without exercise training for 15-week. Fecal microbiota composition and function were assessed by 16S rRNA sequencing. The sequencing results showed that SESN2−/− mice displayed differed microbiome profile from WT mice. Exercise enriched the microflora diversity and increased the beneficial microbial species in WT mice, and SESN2 ablation weakened the beneficial effects of exercise on microbial resilience following HFD consumption. Moreover, network analysis revealed that exercise increased correlation density and clustering of operational taxonomic units in WT mice only. KEGG demonstrated that some dominant metabolism-related enzymes and modules increased in SESN2−/− mice. Our results indicated that the effects of exercise on metabolism are associated with the perturbations of gut microbiota composition and function, suggesting that SESN2 contributes to maintain metabolic homeostasis.−

Aerobic exercise improves executive functions in females, but not males, without the BDNF Val66Met polymorphism

BackgroundAerobic exercise promotes cognitive function in older adults; however, variability exists in the degree of benefit. The brain-derived neurotropic factor (BDNF) Val66Met polymorphism and biological sex are biological factors that have been proposed as important modifiers of exercise efficacy. Therefore, we assessed whether the effect of aerobic exercise on executive functions was dependent on the BDNFval66met genotype and biological sex.MethodsWe used data from a single-blind randomized controlled trial in older adults with subcortical ischemic vascular cognitive impairment (NCT01027858). Fifty-eight older adults were randomly assigned to either the 6 months, three times per week progressive aerobic training (AT) group or the usual care plus education control (CON) group. The secondary aim of the parent study included executive functions which were assessed with the Trail Making Test (B–A) and the Digit Symbol Substitution Test at baseline and trial completion at 6 months.ResultsAnalysis of covariance, controlling for baseline global cognition and baseline executive functions performance (Trail Making Test or Digit Symbol Substitution Test), tested the three-way interaction between experimental group (AT, CON), BDNFval66met genotype (Val/Val carrier, Met carrier), and biological sex (female, male). Significant three-way interactions were found for the Trail Making Test (F(1,48) = 4.412, p < 0.04) and Digit Symbol Substitution Test (F(1,47) = 10.833, p < 0.002). Posthoc analyses showed female Val/Val carriers benefited the most from 6 months of AT compared with CON for Trail Making Test and Digit Symbol Substitution Test performance. Compared with CON, AT did not improve Trail Making Test performance in male Val/Val carriers or Digit Symbol Substitution Test performance in female Met carriers.ConclusionsThese results suggest that future randomized controlled trials should take into consideration BDNF genotype and biological sex to better understand the beneficial effects of AT on cognitive function in vascular cognitive impairment to maximize the beneficial effects of exercise and help establish exercise as medicine for cognitive health.

Distinct microRNA and protein profiles of extracellular vesicles secreted from myotubes from morbidly obese donors with type 2 diabetes in response to electrical pulse stimulation.

Lifestyle disorders like obesity, type 2 diabetes (T2D), and cardiovascular diseases can be prevented and treated by regular physical activity. During exercise, skeletal muscles release signaling factors that communicate with other organs and mediate beneficial effects of exercise. These factors include myokines, metabolites, and extracellular vesicles (EVs). In the present study, we have examined how electrical pulse stimulation (EPS) of myotubes, a model of exercise, affects the cargo of released EVs. Chronic low frequency EPS was applied for 24h to human myotubes isolated and differentiated from biopsy samples from six morbidly obese females with T2D, and EVs, both exosomes and microvesicles (MV), were isolated from cell media 24h thereafter. Size and concentration of EV subtypes were characterized by nanoparticle tracking analysis, surface markers were examined by flow cytometry and Western blotting, and morphology was confirmed by transmission electron microscopy. Protein content was assessed by high-resolution proteomic analysis (LC-MS/MS), non-coding RNA was quantified by Affymetrix microarray, and selected microRNAs (miRs) validated by real time RT-qPCR. The size and concentration of exosomes and MV were unaffected by EPS. Of the 400 miRs identified in the EVs, EPS significantly changed the level of 15 exosome miRs, of which miR-1233-5p showed the highest fold change. The miR pattern of MV was unaffected by EPS. Totally, about 1000 proteins were identified in exosomes and 2000 in MV. EPS changed the content of 73 proteins in exosomes, 97 in MVs, and of these four were changed in both exosomes and MV (GANAB, HSPA9, CNDP2, and ATP5B). By matching the EPS-changed miRs and proteins in exosomes, 31 targets were identified, and among these several promising signaling factors. Of particular interest were CNDP2, an enzyme that generates the appetite regulatory metabolite Lac-Phe, and miR-4433b-3p, which targets CNDP2. Several of the regulated miRs, such as miR-92b-5p, miR-320b, and miR-1233-5p might also mediate interesting signaling functions. In conclusion, we have used a combined transcriptome-proteome approach to describe how EPS affected the cargo of EVs derived from myotubes from morbidly obese patients with T2D, and revealed several new factors, both miRs and proteins, that might act as exercise factors.

Effects on Sleep Quality of Physical Exercise Programs in Older Adults: A Systematic Review and Meta-Analysis.

Given the beneficial effects of exercise in different populations and the close relationship between healthy ageing and sleep quality, our objective was to determine if physical exercise delivered through a structured program improves sleep quality in older adults. Embase, PubMed/MEDLINE, Web of Science, and Cochrane Register of Clinical Trials (CENTRAL) were searched to 15 January 2023. Studies that applied physical exercise programs in older adults were reviewed. Two independent reviewers analysed the studies, extracted the data, and assessed the quality of evidence. Of the 2599 reports returned by the initial search, 13 articles reporting on 2612 patients were included in the data synthesis. The articles used interventions based on yoga (n = 5), multicomponent exercise (n = 3), walking (n = 2), cycling (n = 1), pilates (n = 1), elastic bands (n = 1), and healthy beat acupunch (n = 1). In the intervention group, we found significant improvement in Pittsburgh sleep quality index of -2.49 points (95% CI -3.84 to -1.14) in comparison to the control group (p = 0.0003) and sleep efficiency measured with objective instruments (MD 1.18%, 95% CI 0.86 to 1.50%, p < 0.0001). Our results found that physical exercise programs in older adults improve sleep quality and efficiency measured with objective instruments.

When should I run-the role of exercise timing in metabolic health.

The prevalence of type 2 diabetes is reaching epidemic proportions. First line therapy approaches are lifestyle interventions including exercise. Although a vast amount of studies reports on beneficial effects of exercise on metabolism in humans per se, overall data are contradictory which makes it difficult to optimize interventions. Innovative exercise strategies and its underlying mechanism are needed to elucidate in order to close this therapeutic gap. The skeletal muscle produces and secretes myokines and microRNAs in response to exercise and both are discussed as mechanisms linking exercise and metabolic adaptation. Aspects of chronophysiology such as diurnal variation in insulin sensitivity or exercise as a signal to reset dysregulated peripheral clocks are of growing interest in the context of impaired metabolism. Deep insight of how exercise timing determines metabolic adaptations is required to optimize exercise interventions. This review aims to summarize the current state of research on the interaction between timing of exercise and metabolism in humans, providing insights into proposed mechanistic concepts focusing on myokines and microRNAs. First evidence points to an impact of timing of exercise on health outcome, although data are inconclusive. Underlying mechanisms remain elusive. It is currently unknown if the timed release of mykokines depends on time of day when exercise is performed. microRNAs have been found as an important mediator of processes associated with exercise adaptation. Further research is needed to evaluate their full relevance. In conclusion, it seems to be too early to provide concrete recommendations on timing of exercise to maximize beneficial effects.

An integrative profiling of metabolome and transcriptome in the plasma and skeletal muscle following an exercise intervention in diet-induced obese mice.

Exercise intervention at the early stage of type 2 diabetes mellitus (T2DM) can aid in the maintenance of blood glucose homeostasis and prevent the development of macrovascular and microvascular complications. However, the exercise-regulated pathways that prevent the development of T2DM remain largely unclear. In this study, two forms of exercise intervention, treadmill training and voluntary wheel running, were conducted for high-fat diet (HFD)-induced obese mice. We observed that both forms of exercise intervention alleviated HFD-induced insulin resistance and glucose intolerance. Skeletal muscle is recognized as the primary site for postprandial glucose uptake and for responsive alteration beyond exercise training. Metabolomic profiling of the plasma and skeletal muscle in Chow, HFD, and HFD-exercise groups revealed robust alterations in metabolic pathways by exercise intervention in both cases. Overlapping analysis identified nine metabolites, including beta-alanine, leucine, valine, and tryptophan, which were reversed by exercise treatment in both the plasma and skeletal muscle. Transcriptomic analysis of gene expression profiles in the skeletal muscle revealed several key pathways involved in the beneficial effects of exercise on metabolic homeostasis. In addition, integrative transcriptomic and metabolomic analyses uncovered strong correlations between the concentrations of bioactive metabolites and the expression levels of genes involved in energy metabolism, insulin sensitivity, and immune response in the skeletal muscle. This work established two models of exercise intervention in obese mice and provided mechanistic insights into the beneficial effects of exercise intervention on systemic energy homeostasis.

Potential involvement of circulating extracellular vesicles and particles on exercise effects in malignancies.

Physical activity and exercise have been widely related to prevention, treatment, and control for several non-communicable diseases. In this context, there are innumerous pre-clinical and clinical evidence indicating the potential role of exercise, beyond cancer prevention and survival, improved quality of life, including on psychological components, bone health and cachexia, from cancer survivors is described as well. This mini-review raises the potential role of circulating extracellular and particles vesicles (EVPs) cargo, as exerkines, conducting several positive effects on adjacent and/or distant tissues such as tumor, immune, bone and muscle cells. We highlighted new perspectives about microRNAs into EVPs changes induced by exercise and its benefits on malignancies, since microRNAs can be implicated with intricated physiopathological processes. Potential microRNAs into EVPs were pointed out here as players spreading beneficial effects of exercise, such as miR-150-5p, miR-124, miR-486, and miRNA-320a, which have previous findings on involvement with clinical outcomes and as well as tumor microenvironment, regulating intercellular communication and tumor growth. For example, high-intensity interval aerobic exercise program seems to increase miR-150 contents in circulating EVPs obtained from women with normal weight or overweight. In accordance circulating EVPs miR-150-5p content is correlated with prognosis colorectal cancer, and ectopic expression of miR-150 may reduce cell proliferation, invasion and metastasis. Beyond the involvement of bioactive miRNAs into circulating EVPs and their pathways related to clinical and preclinical findings, this mini review intends to support further studies on EVPs cargo and exercise effects in oncology.

Skeletal muscle mechanisms contributing to improved glycemic control following intense interval exercise and training

High-intensity and sprint interval training (HIIT and SIT, respectively) enhance insulin sensitivity and glycemic control in both healthy adults and those with cardiometabolic diseases. The beneficial effects of intense interval training on glycemic control include both improvements seen in the hours to days following a single session of HIIT/SIT and those which accrue with chronic training. Skeletal muscle is the largest site of insulin-stimulated glucose uptake and plays an integral role in the beneficial effects of exercise on glycemic control. Here we summarize the skeletal muscle responses that contribute to improved glycemic control during and following a single session of interval exercise and evaluate the relationship between skeletal muscle remodelling and improved insulin sensitivity following HIIT/SIT training interventions. Recent evidence suggests that targeting skeletal muscle mechanisms via nutritional interventions around exercise, particularly with carbohydrate manipulation, can enhance the acute glycemic benefits of HIIT. There is also some evidence of sex-based differences in the glycemic benefits of intense interval exercise, with blunted responses observed after training in females relative to males. Differences in skeletal muscle metabolism between males and females may contribute to sex differences in insulin sensitivity following HIIT/SIT, but well-controlled studies evaluating purported muscle mechanisms alongside measurement of insulin sensitivity are needed. Given the greater representation of males in muscle physiology literature, there is also a need for more research involving female-only cohorts to enhance our basic understanding of how intense interval training influences muscle insulin sensitivity in females across the lifespan.

The Role of Physical Exercise in Opioid Substitution Therapy: Mechanisms of Sequential Effects.

It is generally accepted that chronic opioid use is associated with structural and functional changes in the human brain that lead to an enhancement of impulsive behavior for immediate satisfaction. Interestingly, in recent years, physical exercise interventions have been used as an adjunctive treatment for patients with opioid use disorders (OUDs). Indeed, exercise has positive effects on both the biological and psychosocial basis of addiction, modifying neural circuits such as the reward, inhibition, and stress systems, and thus causing behavioral changes. This review focuses on the possible mechanisms that contribute to the beneficial effects of exercise on the treatment of OUDs, with emphasis placed on the description of a sequential consolidation of these mechanisms. Exercise is thought to act initially as a factor of internal activation and self-regulation and eventually as a factor of commitment. This approach suggests a sequential (temporal) consolidation of the functions of exercise in favor of gradual disengagement from addiction. Particularly, the sequence in which the exercise-induced mechanisms are consolidated follows the pattern of internal activation-self-regulation-commitment, eventually resulting in stimulation of the endocannabinoid and endogenous opioid systems. Additionally, this is accompanied by modification of molecular and behavioral aspects of opioid addiction. Overall, the neurobiological actions of exercise in combination with certain psychological mechanisms appear to promote its beneficial effects. Given the positive effects of exercise on both physical and mental health, exercise prescription is recommended as a complement to conventional therapy for patients on opioid maintenance treatment.

The Effect of Physical Activity on the Secretory Function of Muscles and Bone Tissue in Humans

The purpose of the study was to summarize new literature data on the effect of physical activity on the secretory function of skeletal muscles and their relationship with organs. Materials and methods. Analytical methods were used in the study. The search for scientific information was carried out in databases of search systems. Results. Muscles secrete proteins called myokines, which are involved in a variety of processes by interacting with tissues. Current research has shown that exercise, by stimulating the skeletal muscle system in vivo, leads to the release of myokines and causes several effects that explain the positive effect of exercise in the treatment of several diseases of the musculoskeletal system. Skeletal muscles synthesize and secrete a wide range of myokines that contribute to various functions in organs, including the brain. Recent publications have focused much attention on one such myokine, the recently discovered protein irisin, which is secreted into the bloodstream from skeletal muscle during exercise from the membrane-bound precursor fibronectin type III. Irisin promotes metabolic processes such as glucose homeostasis and the darkening of white adipose tissue. Irisin also crosses the blood-brain barrier and initiates a neuroprotective genetic program in the hippocampus, which culminates in increased expression of brain-derived neurotrophic factors. Most studies report that irisin concentration is closely related to health status. For example, irisin levels are significantly lower in patients with obesity, osteoporosis/fracture, muscular atrophy, Alzheimer's disease, and cardiovascular disease. Over the past decade, several myokines have been discovered, expanding our understanding of how muscles interact with other organs. In recent publications, a lot of attention is paid to the recently discovered protein irisin, which contributes to metabolic processes. A series of studies on irisin have provided new insights into the mechanisms of exercise to improve bone density, counteract cartilage degeneration, and maintain overall joint environmental homeostasis. These studies further contribute to the understanding of the role of exercise in the fight against osteoarthritis and may provide important assistance in advancing the prevention and treatment of this common disease. Research on the exercise-induced muscle factor irisin will help to better understand and explain the beneficial effects of exercise on maintaining physical health, especially in the fight against aging and age-related degenerative changes. Conclusion. Thus, exercise-induced stimulation of bioactive cytokines increases muscle anabolism, bone formation, mitochondrial biogenesis, glucose utilization, and fatty acid oxidation, and reduces chronic inflammation

Acoustic streaming enabled moderate swimming exercise reduces neurodegeneration in C. elegans.

Regular physical exercise has been shown to delay and alleviate neurodegenerative diseases. Yet, optimum physical exercise conditions that provide neuronal protection and exercise-related factors remain poorly understood. Here, we create an Acoustic Gym on a chip through the surface acoustic wave (SAW) microfluidic technology to precisely control the duration and intensity of swimming exercise of model organisms. We find that precisely dosed swimming exercise enabled by acoustic streaming decreases neuronal loss in two different neurodegenerative disease models of Caenorhabditis elegans, a Parkinson's disease model and a tauopathy model. These findings highlight the importance of optimum exercise conditions for effective neuronal protection, a key characteristic of healthy aging in the elderly population. This SAW device also paves avenues for screening for compounds that can enhance or replace the beneficial effects of exercise and for identifying drug targets for treating neurodegenerative diseases.

Physical training in adults with asthma: An integrative approach on strategies, mechanisms, and benefits.

Asthma is a chronic airway disease characterized by airflow limitation and respiratory symptoms associated with chronic airway and systemic inflammation, bronchial hyperreactivity (BHR), and exercise-induced bronchoconstriction (EIB). Asthma is a heterogeneous disease classified according to distinct airway and systemic inflammation. Patients commonly present with several comorbidities, including anxiety, depression, poor sleep quality, and reduced physical activity levels. Individuals with moderate to severe asthma often have more symptoms and difficulty achieving adequate clinical control, which is associated with poor quality of life, despite proper pharmacological treatment. Physical training has been proposed as an adjunctive therapy for asthma. Initially, it was suggested that the effect of physical training might be attributed to the improved oxidative capacity and reduced production of exercise metabolites. However, in the last decade, there has been evidence that aerobic physical training promotes anti-inflammatory effects in asthma patients. Physical training improves BHR and EIB, asthma symptoms, clinical control, anxiety, and depression levels, sleep quality, lung function, exercise capacity, and dyspnea perception. Furthermore, physical training reduces medication consumption. The most commonly used exercise strategies are moderate aerobic and breathing exercises; however, other techniques, such as high-intensity interval training, have shown promising effects. In the present study, we reviewed the strategies and beneficial effects of exercise on clinical and pathophysiological asthma outcomes.

Exercise regulates TFEB expression to influence body metabolism

Skeletal muscle is the largest organ in the body. It is also the regulator of glucose homeostasis and is responsible for 80% of postprandial glucose uptake from the circulation. Skeletal muscle is crucial to metabolism, both for its role in glucose uptake and for its importance in exercise and metabolic disease. In this article, we outline the importance of skeletal muscle in metabolism, describe its role in glucose uptake and the diseases associated with dysmetabolism of skeletal muscle. We focus on the role of skeletal muscle in peripheral insulin resistance and the potential of skeletal muscle-targeted therapies in combating insulin resistance and diabetes, as well as other metabolic diseases such as ageing and obesity. In particular, we outline the molecular mechanisms underlying the beneficial effects of exercise on metabolic diseases, including a focus on the TFEB nucleus, which is an important regulator of glucose transport to skeletal muscle. In this article, we give an overview to summarise and discuss the important role of TFEB in metabolic and adaptive responses during exercise.

Signaling of exercise stimuli: mitochondria as communicators

Regular exercise exerts a number of beneficial systemic effects and is associated with better health and performance as well as with reduced vulnerability and mortality from many diseases. While the working muscles are immediately affected by physical and biochemical consequences of physical activity, it is less well understood, how exercise-stimuli can lead to benefits in distant tissues and organs. Various modes of inter-tissue communication are likely involved and include physical-activity related systemic temperature and metabolic changes but also circulating signaling molecules, sometimes refered to as “exerkines”.&#x0D; We are particularly interested in a subgroup of these signaling molecules, namely those that are induced by mitochondrial stress and communicate such stimuli to remote organs, effecting mitochondrial changes there. This group of molecules is termed mitokines and includes peptides that are expressed in the nucleus, such as FGF21 and GDF15, and mitochondria-derived peptides, notably humanin. Mitokines are likely important contributors to beneficial exercise effects to organs such as the brain, heart or lung and therefore are involved in the well-acknowledged physical activity-induced protection from neurological, cardio-vascular diseases and pulmonary diseases.&#x0D; The activation of mitokine-signaling requires mitochondrial stress, which in healthy organisms is usually met with the induction of adaptive mechanisms that bolster cellular resilience, for example by an improving the efficiency of anti-oxidant and anti-inflammatory defense mechanisms. Such adaptations are thought to be protective factors in many diseases from which regular exercise can protect. Mitochondrial stress, however, can also be detrimental under certain conditions and especially, if the stress exceeds the adaptive capacities of the system (cell, tissue, organ or organism) or, if the resilience of the system is compromised, for example due to disease, fatigue or insufficient regeneration time from previous stressors. The concept of such bi-phasic responses is termed hormesis and means that mild stress is met by beneficial adaptations and protections but severe stress has long-term detrimental consequences.&#x0D; The aim of this contribution is to present the evidence that mitochondrial stress due to exercising skeletal muscle leads to the release of mitokines, which in turn modulate mitochondrial quality control, dynamics, antioxidative capacities and respirational activity in a selection of target organs (with a focus on brain and lung). According to the hormetic principle, exercise improves the health of these organs. However, in some cases, mitochondrial communication may be involved in adverse effects of exercise, which will be discussed using the example of heart-kidney mitochondrial crosstalk.

Irisin: An anti-inflammatory exerkine in aging and redox-mediated comorbidities.

Human beings lead largely sedentary lives. From an evolutionary perspective, such lifestyle is not beneficial to health. Exercise can promote many enabling pathways, particularly through circulating exerkines, to optimize individual health and quality of life. Such benefits might explain the protective effects of exercise against aging and noncommunicable diseases. Nevertheless, the miRNA-mediated molecular mechanisms and exerkine interorgan crosstalk that underlie the beneficial effects of exercise remain poorly understood. In this mini review, we focused on the exerkine, irisin, mainly produced by muscle contraction during adaptation to exercise and its beneficial effects on body homeostasis. Herein, the complex role of irisin in metabolism and inflammation is described, including its subsequent effects on thermogenesis through browning to control obesity and improve glycemic regulation for diabetes mellitus control, its potential to improve cognitive function (via brain derived neurotrophic factor), and its pathways of action and role in aging.

The Effect of Exercise on Inflammatory Markers in PCOS Women: A Systematic Review and Meta-Analysis of Randomized Trials.

Polycystic ovary syndrome (PCOS) is a typical female disorder that influences different aspects of women's health. There is a direct association between inflammation and PCOS status. Some evidence supports the beneficial effects of exercise on inflammation status in PCOS women, while others cannot find a significant association. This study aimed to clarify the effect of exercise on inflammatory markers in women with PCOS. Electronic searches in international databases were performed to identify eligible publications up to August 2021, which compared the effects of exercise on inflammatory markers in the intervention group compared to the control group in PCOS women. A weighted mean difference (WMD) using a random-effect model was applied for reporting results. A total of 2525 records were found via database searching, of which 10 were eligible to be included in the analysis. The results of the meta-analysis revealed that exercise could significantly lower the serum level of CRP (WMD: -0.43 mg/L; 95% CI: -0.66 to -0.21; P ≤ 0.01; I 2: 84.9%; P < ≤0.01), while it was not considerable for adiponectin (WMD: -0.33 μg/mL; 95% CI: -0.97 to 0.31; P=0.30; I 2: 0%; P=0.97). In addition, subgroup analyses indicated a significant effect of exercise on CRP in individuals ≥30 years, sample size ≥15 individuals, and aerobic training. Exercise training can reduce CRP levels in women with CRP, particularly in women older than 30 years of age, and in studies with more than 15 participants. The effect of exercise on adiponectin was not noticeable.

The Impact of Exercise on Immunity, Metabolism, and Atherosclerosis.

Physical exercise represents an effective preventive and therapeutic strategy beneficially modifying the course of multiple diseases. The protective mechanisms of exercise are manifold; primarily, they are elicited by alterations in metabolic and inflammatory pathways. Exercise intensity and duration strongly influence the provoked response. This narrative review aims to provide comprehensive up-to-date insights into the beneficial effects of physical exercise by illustrating the impact of moderate and vigorous exercise on innate and adaptive immunity. Specifically, we describe qualitative and quantitative changes in different leukocyte subsets while distinguishing between acute and chronic exercise effects. Further, we elaborate on how exercise modifies the progression of atherosclerosis, the leading cause of death worldwide, representing a prime example of a disease triggered by metabolic and inflammatory pathways. Here, we describe how exercise counteracts causal contributors and thereby improves outcomes. In addition, we identify gaps that still need to be addressed in the future.