article 2021 Convergent validity of a simplified device and relationship between blood lactate and salivary lactate after a vertical squat jump in healthy non-athletes Satomi Okano, Hitomi Nishizawa, Joya Yui, Yoshiharu Yokokawa, Masayoshi Koinuma, Akinori Nakamura JournalJ. Phys. Ther. Sci.Publication typeOriginal ResearchPopulationhealthy non-athletes