Department of Experimental Medicine, Università degli Studi di Genova, 16132 Genoa, Italy.
Centro Polifunzionale di Scienze Motorie, Università degli Studi di Genova, 16132 Genoa, Italy.
Int J Environ Res Public Health. 2020 Sep 30;17(19):7172. doi: 10.3390/ijerph17197172.
Given the wide variety of conditioning program trainings employed, the present study compared the catabolic effects induced by CrossFit and resistance training in moderately trained subjects. Twenty males joined either the CrossFit group (n = 10; 30 min/day of "workout of the day") or the resistance training (RT) group (n = 10; 30 min/day of resistance exercises) thrice a week, for 8 weeks. Salivary levels of cortisol, interleukin 1-beta (IL-1β), and uric acid were assessed via enzyme-linked immunosorbent assays before (PRE) and 30-min after (POST) SESSION 1 and SESSION 24. Variables' percentual changes were computed as (POST-PRE)/PRE*100 in each session (Δ%). CrossFit acutely increased cortisol levels in both sessions, with a significant decrease in Δ%cortisol from SESSION 1 to 24. In the RT group, cortisol values decreased in both sessions, only acutely. A significant decrease in IL-1β levels was registered acutely in both groups, in both sessions, whereas Δ%IL-1β was not different between the two groups. While uric acid levels increased in both groups acutely, a chronic downregulation of Δ%uric acid, from SESSION 1 to 24, was appreciated for the RT group only. Overall, CrossFit appeared to induce more intense effects than the RT program as to the investigated catabolic responses.
鉴于所采用的各种条件训练方案，本研究比较了 CrossFit 和抗阻训练在中等训练水平受试者中引起的分解代谢效应。20 名男性受试者分别加入 CrossFit 组（n = 10；每天 30 分钟的“当日训练”）或抗阻训练组（RT 组；n = 10；每天 30 分钟的抗阻运动），每周 3 次，共 8 周。通过酶联免疫吸附试验（ELISA）在第 1 次和第 24 次运动前后（PRE 和 POST）评估唾液皮质醇、白细胞介素 1-β（IL-1β）和尿酸水平。在每个运动前后（Δ%）计算变量的百分比变化，即（POST-PRE）/PRE*100。CrossFit 在两次运动前后均显著增加皮质醇水平，从第 1 次到第 24 次运动，皮质醇的Δ%显著降低。在 RT 组中，两次运动前后皮质醇值均降低，仅在急性时降低。两组的 IL-1β水平在两次运动前后均急性降低，而两组之间的Δ%IL-1β没有差异。尿酸水平在两组中均急性增加，但仅在 RT 组中观察到从第 1 次到第 24 次运动的慢性下调 Δ%尿酸。总的来说，CrossFit 似乎比 RT 方案更能引起所研究的分解代谢反应。
