目的:描述健康年轻男性在不同运动强度下脂肪和肌肉组织组成和功能的改变,这有助于阐明运动强度对体重管理的影响并告知健身计划。
方法:对10名高强度运动(HIE)运动员的颈部和锁骨上区域进行了3DDixonMRI扫描,20名中等强度运动(MIE)运动员和19名低强度运动非运动员男性对照(NCM)。十二个成像参数,包括肌肉的总体积,白色脂肪组织(WAT),棕色脂肪组织(BAT),和这些组织内的平均脂肪-水分数(FWF)。此外,BAT或WAT与总脂肪(BATr或WATr)的比例以及肌肉的比例,BAT,或WAT与总组织体积(Musp,BATp,和WATp)进行了计算。组间比较参数,并与体重指数(BMI)相关,腰围,和Hipline。
结果:在三组中,HIE组表现出最高的总肌肉(totalMUS)和棕色脂肪组织(totalBAT)体积。相反,NCM组的fwfFAT和fwfBAT值显著较高.与NCM相比,HIE和MIE组的MUSp更高,而BATp和WATp较低。此外,HIE和MIE组的BATr高于NCM组,而WATr较低。在totalBAT之间观察到显着的线性关系,totalWAT,MUSP,BATr,fwfFAT,BMI,所有组的腰围(P<0.05)。
结论:MIE足以达到控制体重的目的,而HIE有助于进一步增加肌肉质量。所有三个物理指标都与图像参数显着相关,腰围成为检测所有组代谢变化的最有效指标。
OBJECTIVE: To delineate the alterations in adipose and muscle tissue composition and functionality among healthy young men across varying exercise intensities, which help to elucidate the impact of exercise intensity on weight management and inform fitness planning.
METHODS: 3D Dixon MRI scans were performed on the neck and supraclavicular area in 10 high-intensity exercises (HIE) athletes, 20 moderate intensity exercises (MIE) athletes and 19 low-intensity exercises non-athlete male controls (NCM). Twelve imaging parameters, including the total volume of muscle, white adipose tissue (WAT), brown adipose tissue (BAT), and the mean fat-water fraction (FWF) within these tissues. Additionally, ratios of BAT or WAT to total fat (BATr or WATr) and the proportions of muscle, BAT, or WAT to total tissue volume (Musp, BATp, and WATp) were calculated. Parameters were compared across groups and correlated with Body Mass Index (BMI), waistline, and hipline.
RESULTS: The HIE group exhibited the highest total muscle (totalMUS) and brown adipose tissue (totalBAT) volumes among the three groups. Conversely, the NCM group had significantly higher fwfFAT and fwfBAT values. The MUSp was higher in the HIE and MIE groups compared to NCM, while the BATp and WATp were lower. Furthermore, the BATr in HIE and MIE groups were higher than NCM group while the WATr were lower. Significant linear relationships were observed between totalBAT, totalWAT, MUSp, BATr, fwfFAT, and BMI, waistline (P < 0.05) across all groups.
CONCLUSIONS: MIE is sufficient for the purpose of weight control, While HIE helps to further increase the muscle mass. All three physical indexes were significantly associated with the image parameters, with waistline emerging as the most effective indicator for detecting metabolic changes across all groups.