LAUSR

Purpose. The study aimed to compare and correlate the power, height, eccentric and concentric force development rate of 3 sequential attempts of countermovement jump (CMJ) and the respective muscle response in beach and indoor volleyball athletes. Methods. The sample involved high-level hard court indoor volleyball (HCIV, n = 7) and high-level sand court beach volleyball (SCBV, n = 6) athletes. They performed 3 CMJs (1 CMJ vs. 2 CMJ vs. 3 CMJ) to determine the height, eccentric force development rate (EFDR), concentric force development rate (CFDR), power, and lower limbs muscle electrical activity. Results. Difference was demonstrated between HCIV vs. SCBV players in 3 CMJ EFDR (–270.2 ± 31.6 N/s vs. –214.3 ± 38.7 N/s). In HCIV, 1 CMJ was different from 2 CMJ and 3 CMJ in EFDR (–239.0 ± 27.3 N/s vs. –285.6 ± 40.2 N/s and –270.2 ± 31.6 N/s), CFDR (87.8 ± 24.4 N/s vs. 89.6 ± 25.7 N/s and 75.0 ± 23.6 N/s), and power (2341.8 ± 342.3 W vs. 2433.9 ± 327.2 W and 2411.0 ± 358.5 W). In SCBV, 2 CMJ was different from 3 CMJ in EFDR (–267.1 ± 45.2 N/s vs. –214.3 ± 38.7 N/s). In 2 CMJ, the left gluteus presented lower electrical activity than the left medial gastrocnemius, and HCIV revealed a difference between the response of the right and left gluteus in 3 CMJ. Conclusions. Our analysis demonstrated ca. 70% of good or excellent intra-class correlation between the beach and indoor groups.