A comparison of the post-activation performance enhancement on subsequent jump followed by back squat or drop jump with wearable resistance.

• Grant number: 24/02510-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: October 01, 2024
• End date: March 31, 2025
• Field of knowledge: Health Sciences - Physical Education
• Principal Investigator: Enrico Fuini Puggina
• Grantee: Gabriel Felipe Arantes Bertochi
• Supervisor: Ken Nosaka
• Host Institution: Escola de Educação Física e Esporte de Ribeirão Preto (EEFERP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
• Institution abroad: Edith Cowan University, Australia
• Associated to the scholarship: 22/02459-0 - The use of wearable resistance in sprint training and performance: Use of new technologies for specific strength training, BP.DR

Abstract

Post-activation performance enhancement (PAPE) is the increase in performance after a muscle contraction due to higher muscle temperature and cellular water content. Most PAPE strategies involve back squat (BS) exercises. However, unlike BS, using jumps as a PAPE strategy demands high speed, which can contribute to the PAPE response, especially if performed with a small additional load through wearable resistance (WR). Furthermore, recent studies with inertial eccentric resistance training show that eccentric exercises can lead to better PAPE gains than traditional BS exercise. Thus, this project aims to compare the traditional PAPE effects of BS with loaded jumps through WR on subsequent jump performance and to investigate if eccentric BS or jump can further benefit the PAPE response. Fourteen athletes will be recruited and will visit the laboratory eight times at least one day apart on a randomized cross-over design. On the first visit, participants will familiarize themselves with the procedures. On the last seven visits, participants will perform the following conditioning activities on a random order: control, eccentric-concentric squat, concentric-only squat, eccentric-only squat, eccentric-concentric Drop Jump (DJ), eccentric-concentric DJ + 10% body mass (BM) WR, and eccentric-only DJ + 10% BM WR. Three baseline and post-conditioning activities countermovement jumps will be performed to assess the PAPE effect. ANOVA repeated measure with Bonferroni post-hoc will assess the statistical difference between conditions.