Post-Graduate Program in Physical Education - Federal University of Maranhão, Brazil.
School of Physical Education, Physiotherapy and Occupational Therapy - Federal University of Minas Gerais, Brazil.
J Therm Biol. 2022 Feb;104:103187. doi: 10.1016/j.jtherbio.2022.103187. Epub 2022 Jan 11.
Plyometric training has been used in several sports and fitness programs to improve jumping ability and explosive strength, both in individual and team sports. Eccentric muscle actions, such as those performed during plyometric jumps, induce muscle damage and consequently a rise in skin temperature (Tsk). Thus, the purpose of this study is to assess the response of infrared thermography measurement as an indirect marker of muscle damage after a protocol of plyometric jumps in physically active subjects. Therefore, for the aim of this study ten male subjects with no previous experience in plyometric training participated in the research (age 22.5 ± 3.3 years, weight 71.7 ± 11.0 kg, height 171.1 ± 5.3 cm, and fat mass 15.5 ± 4.7%). To assess the muscle damage, countermovement jump (CMJ), creatine kinase (CK), delayed-onset muscle soreness (DOMS) and infrared thermography (IRT) were measured at 24, 48, and 72 h after plyometric exercise. The acute exercise protocol of plyometric jumps induced muscle damage, as shown by the CK and DOMS (24 and 48 h, p < 0.05) but no statistical difference was shown between the moments analyzed in Tsk (warm zone). Nevertheless, when comparing baseline to 48h, a moderate effect was found in the Tsk (warm zone) for anterior right thigh (ES = 1.1) and posterior left thigh (ES = 0.9) and large effect was found for anterior left thigh (ES = 1.4) and posterior right thigh (ES = 1.3). A moderate effect in the Tsk (warm zone) was found for posterior right and left thigh (ES = 0.9 and ES = 1.1, respectively) when comparing baseline to 72h of IRT. These results suggest that a plyometric jumping session alters CK and DOMS, as well as the thigh's skin temperature in an evident way, bringing up a possible relation with markers of muscle damage.
跳躍訓練已被用於多種運動和健身計劃中，以提高跳躍能力和爆發力，包括個人運動和團隊運動。離心肌肉運動，如跳躍中的離心肌肉運動，會引起肌肉損傷，從而導致皮膚溫度（Tsk）升高。因此，本研究的目的是評估紅外熱成像測量作為活躍受試者跳躍訓練後肌肉損傷的間接標誌的反應。因此，為了本研究的目的，十名沒有離心跳躍訓練經驗的男性受試者參加了研究（年齡 22.5±3.3 歲，體重 71.7±11.0 公斤，身高 171.1±5.3 厘米，脂肪量 15.5±4.7%）。為了評估肌肉損傷，在離心跳躍（CMJ）、肌酸激酶（CK）、延遲性肌肉痠痛（DOMS）和紅外熱成像（IRT）在離心跳躍後 24、48 和 72 小時進行測量。離心跳躍的急性運動方案引起了肌肉損傷，如 CK 和 DOMS 所示（24 和 48 小時，p<0.05），但在 Tsk（溫暖區域）的分析時刻沒有顯著差異。然而，當將基線與 48 小時相比較時，在前大腿右側（ES=1.1）和左大腿後側（ES=0.9）的 Tsk（溫暖區域）中發現中度效應，在前大腿左側（ES=1.4）和右大腿後側（ES=1.3）中發現大效應。當將基線與 IRT 的 72 小時相比較時，在右大腿和左大腿的後側（ES=0.9 和 ES=1.1）的 Tsk（溫暖區域）中發現中度效應。這些結果表明，跳躍訓練會明顯改變 CK 和 DOMS 以及大腿皮膚溫度，這可能與肌肉損傷的標誌有關。
