Fifty-seven junior baseball players performed eight swings off a tee to record ball exit speed, as well as tests of grip strength, standing broad jump, lateral-to-medial (LM) jumps, chin-ups and chest pass with a medicine ball. The height, weight and age of each participant was also recorded. All anthropometric and physiological tests were significantly positively correlated with ball speed (p < 0.05). Collinearity between variables meant that only chest pass (R² = 0.70, p = 0.000), body mass (ΔR² = 0.03, Δp = 0.021) and LM jump (ΔR² = 0.04, Δp = 0.005) made independent contributions to a stepwise linear regression. These findings corroborate the expectation that upper body power is a major determinant of batting speed, with leg power adding an additional, independent contribution to performance.
Sinclair, Peter J.; Hollings, Matthew; Smith, Stephen; Hardy, Sean; Cassel, Shane; and Freeston, Jonathan L.
"Anthropometric and physiological factors affecting batted ball speed of adolescent baseball players,"
ISBS Proceedings Archive: Vol. 37
, Article 55.
Available at: https://commons.nmu.edu/isbs/vol37/iss1/55