Yano, Y., Yabe, K., Okuno, S., Nagao, R., Naka, K., Honma, K., Yamamoto, S., & Iwata, A. (2019). Dry swing training with a light bat increases bat speed. Journal of Human Sport and Exercise, 14(4), 918–924. https://doi.org/10.14198/jhse.2019.144.19