The effects of high intensity interval training induced H2O2, Nrf2 changes on antioxidants factors in type 2 diabetes

High-intensity interval training alleviates ethanol-induced renal damage: A study on inflammation, oxidative stress, and histopathological changes in rats

Background

This study examines if high-intensity interval training (HIIT) can reduce ethanol-induced kidney damage by modulating cytokines and reducing oxidative stress.

Method

Thirty male Wistar rats were randomly assigned to five groups (n = 6): CON (saline control), ET (ethanol; 3 mg/kg of 20 % ethanol gavage), HIIT (8 weeks of HIIT), HIIT-SL (saline + HIIT), and HIIT-ET (ethanol + HIIT). Kidney tissues were collected for biochemical analysis of cytokines, including tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and interleukin-10 (IL-10); oxidative stress markers, including malondialdehyde (MDA); and antioxidants, including total antioxidant capacity (TAC), glutathione peroxidase (GPx), and superoxide dismutase (SOD). Histopathology and serum levels of albumin, urea, and creatinine were evaluated. Statistical significance was assessed using GraphPad Prism (p < 0.05).

Results

Chronic ethanol consumption increased pro-inflammatory cytokines TNF-α and IL-6 (p < 0.0001) and decreased anti-inflammatory IL-10 (p < 0.0001). Histopathology revealed tubular necrosis, and hyaline casts. HIIT reduced TNF-α and IL-6 while increasing IL-10 (p < 0.0001), showing an anti-inflammatory effect. The HIIT-ET group had fewer hyaline casts and less tubular necrosis compared to the ET group, although hyperemia persisted. HIIT improved antioxidant levels (TAC, GPx, SOD) and reduced oxidative stress (MDA) (p < 0.05). Serum urea and creatinine were higher in the ET group but lower in the HIIT-ET group; albumin levels were increased with HIIT.

Conclusion

The study shows HIIT effectively reduces ET-induced kidney damage by decreasing oxidative stress and inflammation, suggesting it as a promising non-drug approach to manage ET-related renal issues.

Effects of high-intensity interval training and its different protocols on lipid profile and glycaemic control in type 2 diabetes: A meta-analysis

This meta-analysis of randomised clinical trials aimed to compare the effects of high-intensity interval training (HIIT) and its different protocols versus moderate-intensity continuous training (MICT) and/or control on total cholesterol, HDL, LDL, triglycerides, HbA1c levels, and fasting glucose in individuals with type 2 diabetes mellitus (T2DM). The search strategy was performed in PubMed/MEDLINE, Cochrane CENTRAL, EMBASE, Web of Science, Sport DISCUS, and PEDro, until January 2023. A total of 31 studies (1092 individuals) were included. When compared to control, HIIT decreased total cholesterol by -0.31 mmol/L (95% CI -0.49; -0.12), LDL by -0.31 mmol/L (95% CI -0.49; -0.12), triglycerides by -0.27 mmol/L (95% CI -0.33; -0.2), HbA1c by -0.75% (95% CI -0.97; -0.53), fasting glucose by -1.15 mmol/L (95% CI -1.44; -0.86), and increased HDL by 0.24 mmol/L (95% CI 0.06; 0.42). No difference was found in the comparison between HIIT versus MICT for any of the outcomes analysed, however subgroup analysis showed that a moderate-interval (>30s to < 2 min) and moderate-term (>4 to < 12 weeks) HIIT protocol reduced total cholesterol, when compared to MICT. HIIT is able to improve lipid profile and glycaemic control in T2DM individuals, and specific protocols can be recommended for improving total cholesterol levels.

The effect of chronic high-intensity interval training programs on glycaemic control, aerobic resistance, and body composition in type 2 diabetic patients: a meta-analysis

BACKGROUND

Type 2 diabetes is an increasing health problem worldwide. HIIT has been proposed as an exercise alternative to be part of integral type 2 diabetes treatment.

OBJECTIVE

The aim of this meta-analysis was to determine the effect of different types of chronic HIIT on glycaemic control, aerobic resistance, and body composition in individuals above 18 years with T2D.

DESIGN

This meta-analysis was conducted in accordance with the Preferred Reporting Items for Systematic Review and Meta-analysis (PRISMA) statement and was registered with PROSPERO on November 21st, 2021.

DATA SOURCES

A systematic literature search of the following databases: EbscoHost (Academic Search Ultimate, Fuente Académica Plus, MEDline and SportDiscus), Web of Science, PubMed, and EMBASE between April of 2021 and April of 2023 was conducted.

ELIGIBILITY CRITERIA FOR SELECTING STUDIES

Eligibility criteria included (1) participants aged ≥ 18 years with a diagnosis of type 2 diabetes, (2) an HIIT protocol with detailed description, (3) control group and/or continuous aerobic training comparison group, (4) report of pre-test and post-test values for at least one of the studied variables (from glycaemic control, aerobic resistance, and/or body composition), and (5) experimental or quasi-experimental intervention design.

ANALYSES

Meta-analysis was made by a pre-post-test between-group analysis following the inverse variance heterogeneity model for each variable, and then, a subgroup analysis by type of HIIT was conducted.

RESULTS

Of the 2817 records obtained, 180 records were included for meta-analysis. Significant improvements were found in the most part of the variables when HIIT was compared to control group, while fat-free mass kept without changes. HIIT vs. continuous aerobic training results showed and advantage in favor of HIIT for fasting blood glycemia. Subgroup analysis refers a possible advantage of SI-HIIT and SIT-HIIT in the improvement of fasting glycemia and SIT-HIIT advantage in HOMA 1-IR decrease.

CONCLUSIONS

HIIT improves glycaemic control, aerobic resistance, and % fat and waist circumference, and kept fat-free mass unchanged in individuals with T2D. SI-HIIT and SIT-HIIT could be better than the other types of HIIT. HIIT benefit is similar to continuous aerobic training except for fasting blood glycemia.