Cardiovascular, respiratory and cardiometabolic functions in exercise
Karim Azali Alamdari; babak Ebadi Shirmard; Hadi Rohani
Abstract
Background and Aim: Many diseases cause skeletal muscle microvascular rarefaction (MR) and the quantitative determination of the effect size (ES) of exercise training on skeletal muscle capillary to fiber ratio (C/F) can be useful in refining exercise prescriptions for susceptible population. The aim ...
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Background and Aim: Many diseases cause skeletal muscle microvascular rarefaction (MR) and the quantitative determination of the effect size (ES) of exercise training on skeletal muscle capillary to fiber ratio (C/F) can be useful in refining exercise prescriptions for susceptible population. The aim of the present study was to determine the average ES of exercise training on skeletal muscle C/f in patients disposed to MR. Materials and Methods: A search for English articles was conducted in Web of Science, Scopus, and PubMed databases without limiting the year of publication until February 2023. Weighted mean difference (WMD) with 95% confidence intervals was calculated using random effect model. Correlation between variables was investigated using fixed effects model meta-regression.Results: A summary ES achieved as WMD=0.21 (95% CI: 0.17 to 0.26) from the results of 308 subjects, included in 22 exercise training interventions (p=0.014, I2=44.16). No correlations were observed in between the changes in C/F and the age of subjects included in each intervention based on action of the moment’s meta-regression model (r=-0.00, p=0.92, z=0.099). Among the exercise duration categories, interventions less than 8 weeks (n=3) had the least ES on C/F (WMD=0.18), while a WMD of 0.22 were determined for both of interventions with 8 weeks (n=7) and more than 8 weeks duration (n=12) categories (z=9.68, p=0.001). Moreover, interventions in HIIT and intensive aerobic exercise training category had greater ES (WMD=0.23) compared to MICT and aerobic exercise training (WMD= 020) interventions (z=9.73, p=0.001). =
S Vakil Mahallati; M ShariatZadeh Joneidi; H Rohani
Abstract
Aim: The aim of this study was to investigate the effect of short-term CLA supplementation on fat burning rate during exercise in obese women. Method: The subjects of this study were 10 obese women (age 34.7±4.7 yrs, BMI 34.2±4.8 kg/m2, and weight 83.1±1.9 kg). Subjects consumed ...
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Aim: The aim of this study was to investigate the effect of short-term CLA supplementation on fat burning rate during exercise in obese women. Method: The subjects of this study were 10 obese women (age 34.7±4.7 yrs, BMI 34.2±4.8 kg/m2, and weight 83.1±1.9 kg). Subjects consumed 1.5 g/day CLA for 7 days. An incremental exercise test on a treadmill was performed before and after the supplementation period to measure the maximal fat oxidation (MFO) and corresponding intensity (FATmax). Blood samples were taken before and immediately after the test for measuring the serum levels of Glycerol. Paired t-test and ANOVA with repeated measures were used to compare the means of variables. Results: There was no significant difference in mean FATmax between before and after CLA supplementation (p=0.655). Also, no significant difference was observed in MFO between before and after CLA supplementation (p=0.133). CLA supplementation after one exercise session did not have a significant effect on plasma glycerol; However, the interactive effect of these two factors was significant and increased the glycerol levels. Conclusion: In general, the findings of this study showed that CLA supplementation, at least in short-term period, does not improve the fat burning rate during exercise in obese women.
N Khosravi; Hadi Rohani; S Ghaffari
Volume 5, Issue 2 , February 2016, , Pages 121-132
Abstract
Aim: The aim of current study was to evaluate the effect of exercise day-time on maximal fat oxidation (MFO), exercise intensity (FATmax) and time (MFOtime) that elicite MFO and their relation to body composition in normal and overweight women. Metod: Forteen 20-30 years old students were randomly ...
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Aim: The aim of current study was to evaluate the effect of exercise day-time on maximal fat oxidation (MFO), exercise intensity (FATmax) and time (MFOtime) that elicite MFO and their relation to body composition in normal and overweight women. Metod: Forteen 20-30 years old students were randomly selected and participated in to two normal waight (20<BMI-2) and overweight (BMI>25 kg.m-2) group. The data were analyzed using statical teats of dependent and paire T- test to copmair changes between session results. Resuils: Mean value of MFO at morning was significantly higher in overweight group than that in normal group (p<0.05). Also, no significant differences were observed between groups at evening. There was no significant relationship between body fat percent and MFO at morning, nor at evening; however, there was a significant negative relationship between body fat percent and MFOtime in overweight group at evening (r=-0.92, p<0.05). Conclusion: Generally, it seems that maximal fat oxidation during exercise is higher in the people who have more body fat percentage. However, this is eveident at morning rather than evening and enhancing fat oxidation at evening may need longer time exercise with higher intensity.
