Key result
Low-intensity blood flow restriction training significantly reduced serum cTn1 levels compared to high-intensity training (358.13 vs 599.85 pg/mL) and improved myocardial antioxidant and anti-apoptotic capacity in rats.
Why the study?
The study aimed to investigate the effects of low-intensity blood flow restriction training on myocardial tissue in rats and explore the underlying mechanisms.
Does low-intensity blood flow restriction training reduce myocardial injury and improve antioxidant and anti-apoptotic capacity in rats?
Does low-intensity blood flow restriction training reduce myocardial injury and improve antioxidant and anti-apoptotic capacity in rats?
Low-intensity blood flow restriction training effectively reduces myocardial injury markers, decreases cardiomyocyte apoptosis, and improves antioxidant capacity in rats compared to high-intensity training.
Answers are grounded in this paper and cite their sources.
Low-intensity BFR effects on rat myocardium remain hypothesis-generating; leaves open translation to human cardiac outcomes or practice.
Objective: This study aims to investigate the effects of low-intensity blood flow restriction training on myocardial tissue in rats. By measuring the levels of myocardial injury biomarkers in serum and the expression of anti-apoptotic and antioxidant proteins in myocardial tissue, the study preliminarily explores the underlying mechanisms. Methods: Male 3-month-old Sprague-Dawley rats were randomly divided into the following groups: control group (CON), low-intensity training group (LIRT), high-intensity training group (HIRT), and low-intensity blood flow restriction training group (LIBFR), with 6 rats in each group. Body weight, maximum voluntary carrying capacity, myocardial morphology, myocardial injury biomarkers, and the expression levels of Bcl-2, Bax, Nrf2, and Keap1 proteins in myocardial tissue were evaluated. Results: (1)cTn1 Detection: The HIRT group showed a significant increase in cTn1 levels (P < 0.01), while the LIBFR group had a lower cTn1 level compared to the HIRT group (P < 0.05). (2)Nrf2 and Keap1 Results: Compared to the CON group, the LIBFR group showed an increase in Nrf2 (P < 0.05), and a significant increase in Keap1 (P < 0.01). (3)Bcl-2 and Bax Results: Compared to the CON group, Bcl-2 levels were significantly elevated in the HIRT group (P < 0.01) and increased in the LIBFR group (P < 0.05), while Bax expression was significantly reduced in the LIBFR group (P < 0.05). Regarding the Bcl-2/Bax ratio, the LIRT, HIRT, and LIBFR groups exhibited significantly higher values compared to the CON group (P < 0.01). Furthermore, the HIRT and LIBFR groups showed significantly higher Bcl-2/Bax ratios than the LIRT group (P < 0.01). Conclusion: Low-intensity blood flow restriction training can effectively reduce cTn1 in rat serum, decrease cardiomyocyte apoptosis, and improve antioxidant capacity, which has a certain protective effect on the myocardium.
No takes yet. Share an insight, caveat, or question.
Shangguan et al. (2025) studied Healthy rats (myocardial injury model) (n=24). Low-intensity blood flow restriction training (LIBFR) vs. High-intensity resistance training (HIRT) was evaluated on Serum cTn1 concentration (pg/mL) (Cohen's d 1.27, p=0.044). Low-intensity blood flow restriction training significantly reduced serum cTn1 levels compared to high-intensity training (358.13 vs 599.85 pg/mL) and improved myocardial antioxidant and anti-apoptotic capacity in rats.
Synapse has enriched 10 related papers. Consider them for comparative context: