A multi-strength tester (MST) was developed to assess the rate of force development (RFD) during isometric leg extensions. This study aimed to examine the relationship between RFD measured by MST and strength and power performance. Participants performed isometric leg presses with MST, countermovement jumps, squat jumps (SJ), and concentric squat of 70% of 1 repetition maximum (sq70). Significant correlations were found between the early phases of RFD measured by MST and countermovement jump. There were no significant correlations found in SJ. The late phase of RFD measured by MST significantly correlated with sq70. The present results suggest that the early phases of RFD with MST relate with countermovement during jump performance. The late phase of RFD with MST relate with the ability of generating force under heavy resistance.
Zushi, Kodayu; Kariyama, Yasushi; Zushi, Amane; Takahashi, Kazutaka; Yoshida, Takuya; Kigoshi, Kiyonobu; and Ogata, Mitsugi
"CHARACTERISTICS OF STRENGTH AND POWER FOR THE RATE OF FORCE DEVELOPMENT DURING LEG EXTENSION,"
ISBS Proceedings Archive: Vol. 36:
1, Article 65.
Available at: https://commons.nmu.edu/isbs/vol36/iss1/65