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A strict correlation among proximal tubule epithelial cell dysfunction, proteinuria, and modulation of the Renin-Angiotensin System and Kalikrein-Kinin System are crucial factors in the pathogenesis of Acute Kidney Injury (AKI). In this study, we investigated the potential protective effect of preconditioning by moderate-intensity aerobic exercise on gentamicin-induced AKI. Male Wistar rats were submitted to a moderate-intensity treadmill exercise protocol for 8 weeks, and then injected with 80 mg/kg/day s.c. gentamicin for 5 consecutive days. Four groups were generated: 1) NT+SAL (control); 2) NT+AKI (non-trained with AKI); 3) T+SAL (trained); and 4) T+AKI (trained with AKI). The NT+AKI group presented: 1) impairment in glomerular function parameters; 2) increased fractional excretion of Na+ , K+ , and water; 4) proteinuria and increased urinary γ-glutamyl transferase activity (a marker of tubular injury) accompanied by acute tubular necrosis; 5) an increased renal angiotensin-converting enzyme and bradykinin B1 receptor mRNA expression. Interestingly, the preconditioning by moderate-intensity aerobic exercise attenuated all alterations observed in gentamicin-induced AKI (T+AKI group). Taken together, our results show that the preconditioning by moderate-intensity aerobic exercise ameliorates the development of gentamicin-induced AKI. Our findings help to expand the current knowledge regarding the effect of physical exercise on kidneys during physiological and pathological conditions. [ABSTRACT FROM AUTHOR]

Abstract 30 min of moderate-intensity aerobic exercise per day is recommended, but the response and adaptation of endothelial function (EF) to this exercise remains controversial. The purpose of this study was to determine the changes in EF in endurance trained and untrained individuals before and after this exercise and to compare the differences between trained and untrained individuals. Twelve endurance-trained male college athletes (trained group) and 12 untrained male college students (untrained group) performed a 30-min run at an intensity of 60% VO2max. Brachial artery flow-mediated dilation (FMD) was measured before exercise, 30 min and 60 min after exercise, and the following morning. Resting diameter and maximum diameter showed large time effects (p

BACKGROUND: Carboxylesterase 1 and inflammatory factors play a crucial role in regulating lipid metabolism and glucose homeostasis. However, the effects of different exercise intensity interventions on carboxylesterase 1 and inflammatory factors in skeletal muscle of type 2 diabetic rats remain to be revealed. OBJECTIVE: To investigate the effects of different exercise intensity interventions on carboxylesterase 1 and inflammatory factors in skeletal muscle of type 2 diabetic rats. METHODS: Thirty-two 8-week-old male Sprague-Dawley rats were randomly divided into normal control group (n=12) and modeling group (n=20) after 1 week of adaptive feeding. Rat models of type 2 diabetes mellitus were prepared by high-fat diet and single injection of streptozotocin. After successful modeling, the rats were randomly divided into diabetic control group (n=6), moderate-intensity exercise group (n=6) and high-intensity intermittent exercise group (n=6). The latter two groups were subjected to treadmill training at corresponding intensities, once a day, 50 minutes each, and 5 days per week. Exercise intervention in each group was carried out for 6 weeks. After the intervention, ELISA was used to detect blood glucose and blood lipids of rats. The morphological changes of skeletal muscle were observed by hematoxylin-eosin staining. The mRNA expression levels of carboxylesterase 1 and inflammatory cytokines were detected by real-time quantitative PCR. The protein expression levels of carboxylesterase 1 and inflammatory cytokines were detected by western blot and immunofluorescence. RESULTS AND CONCLUSION: Compared with the normal control group, fasting blood glucose, triglyceride, low-density lipoprotein cholesterol, insulin resistance index in the diabetic control group were significantly increased (P < 0.01), insulin activity was decreased (P < 0.05), and the mRNA and protein levels of carboxylesterase 1, never in mitosis gene A related kinase 7 (NEK7) and interleukin 18 in skeletal muscle tissue were upregulated (P < 0.05). Compared with the diabetic control group, fasting blood glucose, triglyceride, low-density lipoprotein cholesterol, and insulin resistance index in the moderate-intensity exercise group and high-intensity intermittent exercise group were down-regulated (P < 0.05), and insulin activity was increased (P < 0.05). Moreover, compared with the diabetic control group, the mRNA level of NEK7 and the protein levels of carboxylesterase 1, NEK7 and interleukin 18 in skeletal muscle were decreased in the moderate-intensity exercise group (P < 0.05), while the mRNA levels of carboxylesterase 1, NEK7, NOD-like receptor heat protein domain associated protein 3 and interleukin 18 and the protein levels of carboxylesterase 1 and interleukin 18 in skeletal muscle were downregulated in the high-intensity intermittent exercise group (P < 0.05). Hematoxylin-eosin staining showed that compared with the diabetic control group, the cavities of myofibers in the moderate-intensity exercise group became smaller, the number of internal cavities was reduced, and the cellular structure tended to be more intact; the myocytes of rats in the high-intensity intermittent exercise group were loosely arranged, with irregular tissue shape and increased cavities in myofibers. To conclude, both moderateintensity exercise and high-intensity intermittent exercise can reduce blood glucose, lipid, insulin resistance and carboxylesterase 1 levels in type 2 diabetic rats. Moderate-intensity exercise can significantly reduce the expression level of NEK7 protein in skeletal muscle, while high-intensity intermittent exercise can significantly reduce the expression level of interleukin 18 protein in skeletal muscle. In addition, the level of carboxylesterase 1 is closely related to the levels of NEK7 and interleukin 18. [ABSTRACT FROM AUTHOR]

Objective: To evaluate the efficacy of pulmonary rehabilitation in the outcomes of patients with chronic obstructive pulmonary disease–obstructive sleep apnoea overlap syndrome patients who used positive airway pressure. Design: Prospective randomized controlled single- blind trial. Patients: A total of 79 patients with chronic obstructive pulmonary disease–obstructive sleep apnoea overlap syndrome were randomly assigned to either the intervention group (n = 40) or control group (n = 39). Methods: All patients consistently adhered to positive airway pressure therapy every night from enrolment in the study, while intervention group patients received additional moderate-intensity aerobic exercise for 20 weeks. Pre- and post-intervention measurements included the 6-Minute Walk Test, Barthel Index, body mass index, fat mass, free fat mass, forced expiratory volume in 1 s (FEV1), FEV1%predicted, modified Medical Research Council, and polysomnography parameters. Results: After 20 weeks, the intervention group exhibited statistically significant improvements in 6MWD, Barthel Index, body mass index, fat mass, and modified Medical Research Council compared with control group (all p

This study aimed to evaluate the effect and individual responsiveness after 12 weeks of high-intensity interval training (HIIT) and moderate-intensity of continuous training (MICT) on adiponectin, cardiometabolic risk factors and physical fitness in overweight adolescents. This study was participated by 52 adolescents, both sexes, 11 and 16 years old, separated into HIIT (n = 13), MICT (n = 15), and control group (CG, n = 24). Body mass, height, waist circumference (WC), fat mass (FM), fat-free mass (FFM), blood pressure, high-density lipoprotein (HDL-c), low-density lipoprotein (LDL-c), triglycerides, glucose, insulin, adiponectin, and C-reactive protein (CRP) were evaluated. Body mass index z-score (BMI-z), waist-to-height ratio (WHtR), insulin resistance, and insulin sensitivity were calculated. Resting heart rate (HRrest), peak oxygen consumption (VO2peak), right handgrip strength (HGS-right), left handgrip strength (HGS-left), and abdominal resistance (ABD) was evaluated. HIIT session lasted around 35 min and MICT of 60 min of exercises on stationary bicycle, three times a weekday for 12 weeks. ANOVA, effect size, and prevalence of responders were used for statistical analysis. HIIT reduced BMI-z, WHtR, LDL-c, and CRP, while increased of physical fitness. MICT reduced HDL-c, while increased of physical fitness. CG reduced FM, HDL-c, and CRP, while increased FFM and HRrest. Frequencies of respondents in HIIT were observed for CRP, VO2peak, HGS-right, and HGS-left. Frequencies of respondents in MICT were observed for CRP and HGS-right. Frequencies of no-respondents in CG were observed for WC, WHtR, CRP, HRrest, and ABD. Conclusion: Interventions with exercises were effective to adiposity, metabolic health, and physical fitness improvements. Individual responses were observed in inflammatory process and physical fitness, important changes in overweight adolescent's therapy. Trial registration number and date of registration: This study was registered with the Brazilian Registry of Clinical Trials (REBEC), the number RBR-6343y7, date of registration May 3, 2017. What is Known: • Effect of regular physical exercise positively affects overweight, comorbidities, and metabolic diseases, recommended mainly for children and adolescents. What is New: • Due to the great inter-individual variability, the same stimulus can provide different responses; adolescents who benefit from the stimulus are considered responsive. • Intervention of HIIT and MICT did not alter the concentrations of adiponectin; however, the adolescents presented responsiveness to the inflammatory process and physical fitness. [ABSTRACT FROM AUTHOR]

Nap deprivation is regarded as a sleep loss for habitual nappers. The beneficial effects of napping and moderate-intensity aerobic exercise on the reduction in planning ability following nighttime sleep deprivation have been proven. However, it is still unknown whether it can improve the performance decline caused by daytime nap deprivation in habitual nappers. Seventy-four healthy adults who had a long-term habit of taking naps were assigned to three interventions after receiving nap deprivation: (1) Control group (no intervention); (2) Nap group (15-min sitting naps); (3) Exercise group (15-min aerobic exercise), in which subjective alertness, mood, fatigue, and task performance in objective alertness (Psychomotor Vigilance Task, PVT) and planning ability (the Tower of London Task) were measured. Results showed that nap deprivation negatively influenced some performance on the psychomotor vigilance (i.e., response times and 10% slowest response time) and planning ability (i.e., planning time). And acute moderate-intensity aerobic exercise improved psychomotor alertness (i.e., response times) and planning ability (i.e., execution accuracy, execution time), a 15-min sitting naps only alleviated subjective fatigue, whereas some performance (i.e., response times) deteriorated when no intervention was used. These findings suggested that acute moderate-intensity aerobic exercise has a better restorative effect on the reduced planning ability and objective alertness due to nap deprivation compared to sitting naps.

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It is essential for patients with hypertension to effectively reduce and maintain appropriate blood pressure levels. As one of the non-pharmacological and invasive methods, physical exercise seems to improve blood pressure of the patients with hypertension. However, different volumes and intensities of physical exercise on the improvement of hypertension are different. To understand the effects of the type of exercise training on blood pressure and the other health status of patients with hypertension, a network meta-analysis was used to compare the mixed effects of different types of exercise training. This systematic review includes all eligible randomized controlled trials of PubMed, Medline, Cochrane Library, and CINAHL. Twelve studies met the inclusion criteria (n = 846 participants at the end of the study). The results show that a medium-intensity training (MIT) is best in improving the blood pressure of patients with hypertension, while a high-volume high-intensity interval training (HVHIIT) is better in reducing body mass and resting heart rate. In addition, the analysis of the exercise capacity shows that HVHIIT has a better effect on the improvement of patients with hypertension. Noticeably, long-term high-volume and appropriate intensity exercise can effectively improve the health status of patients with hypertension. In short, for patients with high blood pressure, MIT seems to be better at lowering blood pressure, while HVHIIT can better improve exercise ability and physical fitness. However, larger randomized controlled trials with a longer duration than those included in this meta-analysis are needed to confirm these results.

Background: Diabetes mellitus (Di) induces the inflammation and destruction of remodeling in cardiovascular environment. Exercise with increase in levels of cardiokines such as FSTL-1 and angiogenesis-inducing factors has cardioprotective effect in some heart diseases. Thus, the purpose of this study was to investigate the effects of moderate-intensity aerobic exercise and insulin injection on levels of cardiac FSTL-1, NDNF, and VEGF in diabetic rats. Methods: To test the hypothesis that FSTL-1 may be a molecular link between exercise and improved cardiac remodeling and angiogenesis in diabetic heart, we subjected diabetic rats, induced by intraperitoneal injection of STZ (55 mg/kg, freshly dissolved in 0.4 ml citrate buffer, pH 4.5). The rats were randomly divided into four groups (n = 6 in each group): control Di (without exercise and without insulin), insulin Di (without exercise and with insulin), exercise Di (with exercise and without insulin), and insulin and exercise Di (with exercise and with insulin), for 6 weeks and examined the relevance of FSTL-1, NDNF, and VEGF to exercise-mediated cardiac effects. The 6-week exercise training intervention involved 30 min of moderate-intensity running on a treadmill once daily (5 d/w). Measurement levels of cardiac FSTL-1, NDNF, and VEGF were performed an ELISA kit. Representative image of myocardium stained with H&E. Data were analyzed by two-way ANOVA and Pearson correlation coefficient. Results: The results of this study show that exercise or insulin injection alone has a significant effect on FSTL-1 and NDNF (p ≤ 0.05). Also, there is a significant interaction between exercise and insulin in FSTL-1 (P = 0.001, F = 61.612), and NDNF (P = 0.001, F = 29.414) and VEGF (P = 0.001, F = 29.414). Conclusion: The results of this study showed that insulin and exercise Di group had better effects on NDNF and VEGF in diabetic animal. Also, FSTL-1 changes and functions in the heart of diabetic rats were different from other pathology such as MI sample. However, in this regard and investigating these factors in the heart of the diabetic sample, more studies are needed. [ABSTRACT FROM AUTHOR]

Muscle atrophy is characterized by the loss of muscle function. Many efforts are being made to prevent muscle atrophy, and exercise is an important alternative. Methylglyoxal is a well-known causative agent of metabolic diseases and diabetic complications. This study aimed to evaluate whether methylglyoxal induces muscle atrophy and to evaluate the ameliorative effect of moderate-intensity aerobic exercise in a methylglyoxal-induced muscle atrophy animal model. Each mouse was randomly divided into three groups: control, methylglyoxal-treated, and methylglyoxal-treated within aerobic exercise. In the exercise group, each mouse was trained on a treadmill for 2 weeks. On the last day, all groups were evaluated for several atrophic behaviors and skeletal muscles, including the soleus, plantaris, gastrocnemius, and extensor digitorum longus were analyzed. In the exercise group, muscle mass was restored, causing in attenuation of muscle atrophy. The gastrocnemius and extensor digitorum longus muscles showed improved fiber cross-sectional area and reduced myofibrils. Further, they produced regulated atrophy-related proteins (i.e., muscle atrophy F-box, muscle RING-finger protein-1, and myosin heavy chain), indicating that aerobic exercise stimulated their muscle sensitivity to reverse skeletal muscle atrophy. In conclusion, shortness of the gastrocnemius caused by methylglyoxal may induce the dynamic imbalance of skeletal muscle atrophy, thus methylglyoxal may be a key target for treating skeletal muscle atrophy. To this end, aerobic exercise may be a powerful tool for regulating methylglyoxal-induced skeletal muscle atrophy.

Moderate intensity exercise is considered as a primary step to prevent coronary artery diseases (CADs) by stimulated FSTL-1 secretion as a novel myokines to improve endothelial cell function, prevent arterial stiffness, or vascular inflammation. This review aims to provide the current evident role of FSTL-1 as a novel myokine secreted during exercise to prevent atherosclerosis progression. A systematic review using databases from (PubMed), ScienceDirect, and The Cochrane Library, was conducted up to October 2021 to identify all the eligible experimental and observational studies that assess how moderate intensity exercises stimulate FSTL-1 secretion to prevent atherosclerosis. Results were described through narrative synthesis of the evidence. From 84 retrieved references, 15 studies met the inclusion criteria and were included in this review. The overall results suggest that exercise or physical activity can stimulate myokines secretion, especially in FSTL-1. FSTL-1 is a myokine or adipokine that plays a potential role in preventing atherosclerosis by various mechanisms such as via improvement of endothelial functions, suppression of smooth muscle cells (SMCs) proliferation, and reduction of arterial thickening. FSTL-1 is a relatively new and less known myokine, but probably holds a key role in assessing how moderate intensity aerobic exercise prevents atherosclerosis progression by preventing endothelial dysfunction, arterial stiffness, or vascular inflammation., Competing Interests: Conflict of Interest None declared., (International College of Angiology. This article is published by Thieme.)

Nap deprivation is regarded as a sleep loss for habitual nappers. The beneficial effects of napping and moderate-intensity aerobic exercise on the reduction in planning ability following nighttime sleep deprivation have been proven. However, it is still unknown whether it can improve the performance decline caused by daytime nap deprivation in habitual nappers. Seventy-four healthy adults who had a long-term habit of taking naps were assigned to three interventions after receiving nap deprivation: (1) Control group (no intervention); (2) Nap group (15-min sitting naps); (3) Exercise group (15-min aerobic exercise), in which subjective alertness, mood, fatigue, and task performance in objective alertness (Psychomotor Vigilance Task, PVT) and planning ability (the Tower of London Task) were measured. Results showed that nap deprivation negatively influenced some performance on the psychomotor vigilance (i.e., response times and 10% slowest response time) and planning ability (i.e., planning time). And acute moderate-intensity aerobic exercise improved psychomotor alertness (i.e., response times) and planning ability (i.e., execution accuracy, execution time), a 15-min sitting naps only alleviated subjective fatigue, whereas some performance (i.e., response times) deteriorated when no intervention was used. These findings suggested that acute moderate-intensity aerobic exercise has a better restorative effect on the reduced planning ability and objective alertness due to nap deprivation compared to sitting naps., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Du, Huang, Zhao, Wang, Xu, Zhang, Xiao, Xu, Wang, Su and Tang.)

It is essential for patients with hypertension to effectively reduce and maintain appropriate blood pressure levels. As one of the non-pharmacological and invasive methods, physical exercise seems to improve blood pressure of the patients with hypertension. However, different volumes and intensities of physical exercise on the improvement of hypertension are different. To understand the effects of the type of exercise training on blood pressure and the other health status of patients with hypertension, a network meta-analysis was used to compare the mixed effects of different types of exercise training. This systematic review includes all eligible randomized controlled trials of PubMed, Medline, Cochrane Library, and CINAHL. Twelve studies met the inclusion criteria ( n = 846 participants at the end of the study). The results show that a medium-intensity training (MIT) is best in improving the blood pressure of patients with hypertension, while a high-volume high-intensity interval training (HVHIIT) is better in reducing body mass and resting heart rate. In addition, the analysis of the exercise capacity shows that HVHIIT has a better effect on the improvement of patients with hypertension. Noticeably, long-term high-volume and appropriate intensity exercise can effectively improve the health status of patients with hypertension. In short, for patients with high blood pressure, MIT seems to be better at lowering blood pressure, while HVHIIT can better improve exercise ability and physical fitness. However, larger randomized controlled trials with a longer duration than those included in this meta-analysis are needed to confirm these results., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Lu, Song, Chen, Li, Teo and Gu.)