Objective: Excess visceral adipose tissue is associated with insulin resistance and other metabolic disorders, including deregulation of adipokine secretion, which may be corrected by aerobic exercise training. Asprosin is a novel adipokine responsible for the regulation of appetite and the release of glucose from the liver, and its levels are pathologically elevated in obesity. The aim of the study was to evaluate the effects of 8-week Nordic walking (NW) training at maximal fat oxidation intensity (FAT_max) on changes in body mass, as well as those in insulin resistance and asprosin levels among young women with visceral obesity and metabolic disorders.Materials and Methods: The study was completed by 14 women (30.14 ± 3.63 years) representing low levels of physical activity, visceral obesity (waist circumference 105.50 ± 14.87 cm, BMI 33.85 ± 5.48 kg/m²) and with metabolic disorders, who for 8 weeks (three times a week, 60 min), participated in NW training at the FAT_max intensity (61.92 ± 6.71% HR_max, 42.33 ± 8.69% VO_2max) controlled on the basis of heart rate (114.21 ± 14.10 bpm).Results: After 4 and 8 weeks of NW training, a significant decrease in the concentration of asprosin, waist and hip circumference (HC), waist-to-height ratio and body adiposity index (BAI) (p < 0.05, large effect size) were found.Conclusion: The 8-week NW training at an FAT_max intensity decreases the concentration of asprosin in the blood as well as visceral obesity in young women with metabolic disorders.

Maximal physical effort induces a disturbance in the body’s energy homeostasis and causes oxidative stress. The aim of the study was to determine whether prooxidant–antioxidant balance disturbances and the secretion of adipokines regulating metabolism, induced by maximal intensity exercise, are dependent on body composition in young, healthy, non-obese individuals. We determined changes in the concentration of advanced protein oxidation products (AOPP), markers of oxidative damage to nucleic acids (DNA/RNA/ox), and lipid peroxidation (LPO); catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) activity, as well as concentrations of visfatin, leptin, resistin, adiponectin, asprosin, and irisin in the blood before and after maximal intensity exercise in men with above-average muscle mass (NFAT-HLBM), above-average fat mass (HFAT-NLBM), and with average body composition (NFAT-NLBM). We corrected the post-exercise results for the percentage change in plasma volume. In all groups after exercise, there was an increase in LPO and resistin. In HFAT-NLBM, additionally, an increase in CAT and a decrease in SOD activity were noted, and in NFAT-NLBM, an increase in visfatin concentration was observed. In our study, the effect was demonstrated of a maximal effort on six (LPO, CAT, SOD, visfatin, resistin, and asprosin) of the twelve parameters investigated, while the effect of body composition on all parameters investigated was insignificant. Maximal intensity aerobic exercise induces secretion of resistin and damages lipids regardless of the exercising subjects’ body composition. Large fat tissue content predisposes to exercise-induced disorders in the activity of antioxidant enzymes. We have also shown that it is necessary to consider changes in blood plasma volume in the assessment of post-exercise biochemical marker levels.

Metabolic risk increases with age and may be accompanied by changes in adipocytokine secretion and insulin sensitivity. The primary exploratory aim of this prospective, uncon-trolled study was to determine whether repeated whole-body cryotherapy (WBC) changes circulating meteorin-like hormone (METRNL) concentrations in women of different ages. Secondary exploratory outcomes included irisin, asprosin, leptin, adiponectin, insulin, fasting blood glucose (FBG), lipid profile, homeostasis model assessment of insulin resistance (HOMA-IR), triglyceride–glucose index (TyG), atherogenic index of plasma (AIP), and the leptin/adiponectin ratio. A total of 48 women were divided into three groups: GR-60 (60–70 years, n = 14), GR-40 (40–50 years, n = 18), and GR-20 (20–30 years, n = 16). Participants underwent 30 WBC sessions, each lasting 3 min at minus 120 °C. Blood samples were collected before the first WBC session, after the 10th, 20th, and 30th sessions, and two weeks after the final session. Repeated WBC did not significantly change circulating METRNL or other adipocytokines in any age group. A preliminary decrease in insulin concentration and HOMA-IR was observed after 20 WBC sessions only in GR-60. These findings suggest that repeated WBC may be associated with favorable changes in selected insulin-resistance markers in older postmenopausal women; however, the absence of a non-WBC control group, small subgroup sizes, and the multiplicity burden preclude causal or therapeutic conclusions. Randomized controlled studies are needed to verify these exploratory observations.