Sato, B., Sato, S., Yamaguchi, H., Yasunaga, Y., & Sato, M. (2023). Acute effect of HAL (limb type)-assisted cybernic voluntary control squat exercise on tennis serve speed. ITF Coaching & Sport Science Review, 31(91), 32–36. https://doi.org/10.52383/itfcoaching.v32i91.392