Radiology Department, Tongji Hospital, Tongji Medical College, HUST, Wuhan, China.
Orthopedics Department, Wuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, HUST, Wuhan, China.
Eur J Radiol. 2024 Aug;177:111559. doi: 10.1016/j.ejrad.2024.111559. Epub 2024 Jun 8.
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.
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.
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.
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.
描绘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变化，以阐明运动强度对体重管理的影响，并为健身计划提供信息。
对 10 名高强度运动（HIE）运动员、20 名中强度运动（MIE）运动员和 19 名低强度运动非运动员男性对照组（NCM）的颈部和锁骨区域进行了 3D Dixon MRI 扫描。包括肌肉、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）的总容积在内的 12 个影像学参数。此外，还计算了 BAT 或 WAT 与总脂肪的比率（BATr 或 WATr）以及肌肉、BAT 或 WAT 与总组织体积的比例（Musp、BATp 和 WATp）。比较了各参数在各组之间的差异，并与体重指数（BMI）、腰围和臀围相关。
HIE 组的总肌肉（totalMUS）和棕色脂肪组织（totalBAT）体积在三组中最高。相反，NCM 组的 fwfFAT 和 fwfBAT 值显著较高。HIE 和 MIE 组的 MUSp 高于 NCM 组，而 BATp 和 WATp 较低。此外，HIE 和 MIE 组的 BATr 高于 NCM 组，而 WATr 较低。在所有组中，总 BAT、总 WAT、MUSp、BATr、fwfFAT 和 BMI、腰围之间存在显著的线性关系（P<0.05）。
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。所有三个身体指数与影像参数显著相关，其中腰围是所有组中检测代谢变化的最有效指标。
