Trovato Bruno, Sortino Martina, Petrigna Luca, Roggio Federico, Musumeci Giuseppe
Department of Biomedical and Biotechnological Sciences, Section of Anatomy, Histology and Movement Science, School of Medicine, University of Catania, Catania, Italy.
Research Center on Motor Activities (CRAM), University of Catania, Catania, Italy.
Front Physiol. 2024 Aug 1;15:1393804. doi: 10.3389/fphys.2024.1393804. eCollection 2024.
Infrared thermography is gaining attention in the field of sports medicine and performance. This study investigated the effects of static and dynamic warm-ups and a 90° change of direction (COD) exercise on the thermal response of the knee.
Thermograms were collected using the FlIR E54 Imaging Camera from 85 healthy young adults, 46 men and 39 women, aged 20-31 years. The participants were divided in two groups, static and dynamic warm-up. Four thermograms were taken: baseline (T0), warm-up (T1), COD (T2), and rest (T3). Four regions of interest (ROIs) of the knee were analyzed: anterior upper half (AUH), anterior lower half (ALH), posterior upper half (PUH), and posterior lower half (PLH). Mixed ANOVA with the Bonferroni-Holm test and independent -test were used for pairwise comparison and to spot differences between the right and left knees at T1 and T2 and at T0 between men and women, respectively.
The mixed ANOVA was significant for time points (< 0.001) in all the ROIs and for the stretching/temperature interaction with different levels of significance. The -test results for the right and left knees at T1 and T2 were not significant. The temperature in the static warm-up group followed a decrease at T1, a subsequent decrease at T2, and a recovery similar to the baseline at T3, in the ALH in men and women and in the PUH only in men.
Static stretching was more suitable for preparing the knee for the COD exercise than the dynamic one in terms of the thermal response.
红外热成像技术在运动医学和运动表现领域正受到关注。本研究调查了静态和动态热身以及90°变向（COD）运动对膝关节热反应的影响。
使用FlIR E54成像相机从85名年龄在20 - 31岁的健康年轻人（46名男性和39名女性）收集热成像图。参与者被分为两组，静态热身组和动态热身组。共拍摄四张热成像图：基线（T0）、热身（T1）、COD运动后（T2）和休息（T3）。分析膝关节的四个感兴趣区域（ROI）：前上半部分（AUH）、前下半部分（ALH）、后上半部分（PUH）和后下半部分（PLH）。使用带有Bonferroni - Holm检验的混合方差分析和独立t检验分别进行两两比较，并找出在T1和T2时左右膝之间以及在T0时男性和女性之间的差异。
混合方差分析在所有ROI中对于时间点（<0.001）以及对于具有不同显著水平的拉伸/温度交互作用均具有显著性。T1和T2时左右膝的t检验结果不显著。在男性和女性的ALH以及仅在男性的PUH中，静态热身组的温度在T1时下降，随后在T2时进一步下降，并在T3时恢复到与基线相似的水平。
就热反应而言，静态拉伸比动态拉伸更适合为膝关节进行COD运动做准备。
