Journal of Exercise & Organ Cross Talk

Abstract Sedentary obesity is associated with chronic inflammation, oxidative stress, and impaired angiogenesis, leading to endothelial dysfunction. Interval training and CoQ10 each improve redox balance and vascular health, possibly via inter-organ crosstalk, but their combined effects in sedentary obese men are unclear. Sixty sedentary obese men (30–45 years) were randomized into four groups (n=15): control, CoQ10 (100 mg/day), moderate-intensity intermittent training (3×/week, 8 weeks), and training + CoQ10. Serum VEGF, TAC, and H₂O₂ were measured pre/post-n via ELISA and colorimetric assays. Data were analyzed with repeated-measures ANOVA (α=0.05). Effect sizes (partial η²) were reported. Training significantly raised VEGF (p < 0.001, η² = 0.363) and TAC (p < 0.001, η² = 0.290), while strongly reducing H₂O₂ (p < 0.001, η² = 0.520). CoQ10 showed no significant main or interactive effects on TAC or H₂O₂; however, a significant three-way interaction (time × exercise × supplement) was observed for VEGF (p = 0.001, η² = 0.187). Post-hoc analysis revealed that the exercise-only group showed a greater increase in VEGF compared to the combined group, though the direct comparison between TR and TR+SUP at post-intervention did not reach statistical significance (p > 0.05). Eight weeks of interval training robustly improves VEGF and redox homeostasis in sedentary obese men, possibly through myokines/exerkines enhancing muscle–adipose–endothelial crosstalk and HIF-1α/VEGF signaling. CoQ10 provides no added benefit for most outcomes and may be associated with a modest attenuation of the exercise-induced VEGF response.

Abstract The objective of this study was to evaluate the effects of endurance, resistance, and Concurrent endurance and resistance training on fat oxidation and fatigue levels in obese diabetic rats. A total of forty overweight rats (average weight of 380 ± 50 g) were randomly assigned to five distinct groups. Diabetes was induced through peritoneal administration of Streptozotocin at a dosage of 55 mg/kg body weight. Endurance training was conducted via moderate-intensity treadmill running (50%-70% of maximum running capacity) for a duration of eight weeks, with sessions lasting one hour per day, five days a week. Resistance training involved ladder climbing at 50-70% of maximum load, also for eight weeks, with five sessions per week, comprising 15 climbs per session and a one-minute rest interval between climbs. The Concurrent training regimen alternated between treadmill and ladder exercises. Levels of CPT1 and CPT2 were quantified using rat CPT1 and CPT2 ELISA kits, both prior to and 48 hours following the training period. Fatigue indices were assessed as well. All three training modalities significantly influenced CPT1 levels (F=93.35, P=0.001) and led to a notable increase in CPT2 levels (F=26.76, P=0.001). Additionally, significant alterations in fatigue indices were observed (F=26.12, P=0.001). The findings suggest that aerobic, resistance, and Concurrent training regimens can enhance metabolic function and prolong the duration until fatigue in elderly diabetic rats. Nonetheless, the extent of these improvements is somewhat contingent upon the specific type of exercise performed, with aerobic and Concurrent training demonstrating a more pronounced effect compared to resistance training.