Comportamento da temperatura da pele no exercício por meio da termografia infravermelha: uma revisão integrativa / Behaviour of skin temperature in exercise via infrared thermography: an integrative review

O objetivo foi realizar uma análise crítica sobre os principais aspectos metodológicos empregados nas pesquisas sobre a resposta da temperatura da pele por termografia infravermelha, bem com seu comportamento durante diferentes formas de exercício, além de descrever as alterações que ocorrem no decorrer do processo de recuperação de até uma hora. Foi realizada uma busca sistemática nas bases de dados MEDLINE/Pubmed, Scielo e Science Direct, utilizando os termos "thermography" and "exercise", no período de janeiro de 2012 a outubro de 2021, sendo incluídos apenas estudos realizados em laboratório. Os principais resultados indicam que a maior parte dos estudos são realizados com homens, adultos, com número amostral restrito. A região de membros inferiores é a mais estudada. O treinamento de força compreendeu 54% dos estudos. Durante exercício progressivo, existe uma clara tendência de redução da temperatura, enquanto no exercício de carga contínua isso somente ocorre nos momentos iniciais. Como conclusão, têm-se uma carência de estudos com mulheres e grupos com faixas etárias extremas, e os procedimentos de análise de imagens não são uniformes entre os estudos. A resposta da temperatura da pele é diferente em função do tipo de exercício realizado (progressivo ou constante), bem como da região exercitada. (AU)

The objective was critically to analyze the main methodological aspects employed in research studies investigating the response of skin temperature to exercise measured via thermography, as well as to describe the behaviour of during and until 1 h after different modes of exercise. A systematic search was performed in the MEDLINE/Pubmed, Scielo, and Science Direct databases using the keywords thermography AND exercise, between January 2012 to October 2021. Only laboratory studies were included. The main results indicate that most studies were performed with male adults, with small sample size. Lower limbs represent the body region more studied. Regarding exercise mode, strength training abranged 54% of studies. During progressive exercise there is clearly a skin temperature reduction, and during continuous exercise of constant load the decrease occur at initial moments of exercise. In conclusion, there is a lack of studies analyzing female and broader age groups, and procedures for analyzing images are not uniform across studies. The skin temperature response to exercise is different according with the mode of exercise performed (constant or progressive load) and exercised body region. (AU)

Thermographic response resulting from strength training: A preliminary study

INTRODUCTION: Exercise induces modifications in thermal homeostasis. The type of exercise may have a specific impact on skin temperature (Tsk). OBJECTIVE: To analyze and compare the behavior of Tsk in a resistance training between men and women and monitor the thermal recovery response. MATERIAL AND METHODS: Sixteen male and female adults (24.56±3.22 years old) underwent a resistance circuit training session. They performed 3 sets of 12 repetitions with 70-80% 1 RM for lat pulldown, leg press, and biceps arm curl exercises. Thermograms were taken in anterior and posterior body view at rest, 20min, and 24h after training. Tsk was measured in the body regions of interest corresponding to the brachial biceps, quadriceps, and upper back. ANOVA with Tukey's post hoc test was used to analyze Tsk changes among moments, and independent samples t-test was used to compare Tsk between males and females. RESULTS: At rest, women showed Tsk significantly lower than men. There was no significant Tsk change 20min after exercise. However, Tsk increased 24h after exercise in the upper back for men compared with baseline and in quadriceps for women compared with baseline and 20min after exercise (p < 0.05). CONCLUSION: The Tsk of women at rest is lower than that of men. A resistance circuit training session does not significantly change Tsk 20min after exercise, but it increases Tsk 24h after training in the upper back for men and quadriceps for women

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