Document is current

Article History

Received: 16 September 2025

Accepted: 9 December 2025

First Online: 20 December 2025

Declarations

:

: This study was approved by the Research Ethics Committee of Universidade Anhembi Morumbi, São José dos Campos, Brazil (approval number: 5.757.048), and registered on Plataforma Brasil (CAAE: 57484621.4.0000.5492). All procedures were performed in accordance with the ethical standards of the institutional and national research committees and with the 1964 Helsinki declaration and its later amendments.

: Informed consent was obtained from all individual participants included in the study.

: Nature of the Research: You are being invited to participate in this research, which aims to evaluate the systemic and distal effects of low-intensity photobiomodulation in various clinical contexts. Research Participants: 300 Participation in the Research: By participating in this study, you allow the researcher(s) to use the collected data in scientific and public publications without any conflict of interest. You have the freedom to decline participation or withdraw at any stage of the research without any consequences. You may request additional information about the research at any time by contacting the project researcher or, if necessary, the Research Ethics Committee. Interviews: Interviews will be conducted digitally, via phone, or in person for clarification and information collection. Risks and Discomforts: Participation in this research does not involve legal complications. All procedures in this study comply with the Ethics Guidelines for Research Involving Humans, as stated in Resolution No. 196/96 of the National Health Council. None of the procedures pose risks to your dignity. Confidentiality: All information collected in this study is strictly confidential. Only the researcher(s) and supervisor will have access to the data. Benefits: Participation in this study will not provide direct benefits to you. However, we hope that this study will generate important insights into the use of new health devices. The knowledge gained from this research may benefit public health. The researcher commits to sharing the results obtained. Payment: There are no costs for you to participate in this research, nor will you receive any compensation for your participation. After these clarifications, we request your free consent to participate in this research. Note: Do not sign this form if you still have questions about it. Informed Consent Having reviewed the points above, I freely and knowingly give my consent to participate in the research. I declare that I have received a copy of this consent form and authorize the research and publication of the data obtained in this study.Research Participant’s NameResearch Participant’s SignatureResearcher’s Signature Supervisor’s Signature Principal Researcher: Aline Garrido, fonogarrido@gmail.com Other Researchers: Renato Zangaro

: The authors declare no competing interests.

: This study is registered in the Brazilian Clinical Trials Registry (ReBEC), clinical trial number RBR‑34h937k (date of registration: 29 July 2024). The present manuscript reports the acute, single‑session pre–post PBM analysis in 41 female teachers with vocal fatigue; the originally planned multi‑session component of the protocol was not carried out as intended.