Time course of post-activation potentiation induced by drop jumps in men and women.

• Grant number: 22/15372-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2023
• End date: January 31, 2024
• Field of knowledge: Health Sciences - Physical Education
• Principal Investigator: Alessandro Moura Zagatto
• Grantee: Pérsio Gustavo Floret Magrini
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

Body warming is an extremely necessary action in the sports scenario, among the benefits of this action may be the occurrence of post-activation potentiation (PAP). Regarding PAP, this is characterized by the involuntary increase in the contractile capacity to generate force in response to maximal or submaximal stimuli, usually identified by the twitch interpolation technique. The increase in force generated by PAP can result in increased performance, but it is expected by the balance between strength gains generated by PAP and residual fatigue resulting from the conditioning activity. Plyometric efforts led to less residual fatigue due to shorter execution time, as in the case of drop jumps (DJ) repetitions. The optimal interval between the conditioning activity and the main effort and the time of PAP effect is still a challenge, so the objective of this project is to verify the time course of the effects of PAP induced by DJs. 10 men and 10 women will be recruited for the study, this will be cross-controlled and there will be 6 visits to the laboratory, the three tests being used as familiarization with DJ procedures and neuromuscular estimates, on the fourth day a test will be performed to determine height performance of the DJs, on the fifth and sixth visit data acquisition will be carried out, where the volunteers will be admitted to a neuromuscular evaluation to obtain pre-activity peak force values, soon after following the DJ protocol or control condition and post-activity neuromuscular estimates conditioning every 2 minutes until the strength values return to values close to those measured before the conditioning activity.