Effects of High-Speed Power Training on Muscle Performance and Braking Speed in Older Adults

Table 2

Change in muscle performance across a range of external resistances after 12-weeks of training (using loads relative to baseline 1RM). Data represent mean (95% CI).

Variable		40% 1RM	50% 1RM	60% 1RM	70% 1RM	80% 1RM	90% 1RM
Leg press peak power (W)	HSPT; (𝑛=21)	229.0; (159.3–299.3)*	198.7; (124.6–272.8)*	204.9; (123.9–285.8)*	198.5; (108.4–288.6)*	176.9; (80.8–273.1)*	190.9; (92.0–290.0)*
	SSST; (𝑛=23)	145.8; (81.1–210.4)	106.2; (61.7–150.7)	104.5; (58.0–150.9)	138.7; (82.0–195.3)*	167.1; (79.1–255.1)*	172.3; 63.2–281.4)*
	CON; (𝑛=17)	61.9; (−1.8–125.8)	59.7; (−4.4–123.8)	31.8; (−15.5–79.0)	6.9; (−58.9–72.8)	−8.9; (−87.8–70.1)	−51.1; (−145.2–43.0)
Leg press peak power velocity (m/s)	HSPT; (𝑛=21)	0.25; (0.15–0.34)*	0.19; (0.10–0.29)*	0.17; (0.08–0.25)*	0.14; (0.05–0.22)*	0.11; (0.04–0.19)*	0.11; (0.03–0.19)*
	SSST; (𝑛=23)	0.17; (0.07–0.25)	0.11; (0.05–0.17)	0.09; (0.04–0.15)	0.11; (0.04–0.17)*	0.11; (0.04–0.18)*	0.10; (0.02–0.17)*
	CON; (𝑛=17)	0.06; (−0.02–0.13)	0.05; (−0.01–0.11)	0.0; (−0.05–0.05)	−0.02; (−0.09–0.05)	−0.03; (−0.10–0.04)	−0.05; (−0.12–0.02)
Leg press peak power force (N)	HSPT; (𝑛=21)	63.3; (37.4–89.1)	57.6; (29.0–86.2)	62.8; (22.5–103.1)	79.0; (40.1–117.2)	78.4; (24.4–132.4)	92.8; (31.3–154.3)
	SSST; (𝑛=23)	46.1; (22.8–69.4)	30.1; (8.7–51.6)	30.8; (5.3–56.4)	46.7; (22.8–70.7)	49.2; (21.0–77.4)	51.7; (9.8–93.6)
	CON; (𝑛=17)	27.7; (1.5–54.0)	24.9; (−7.0–57.0)	32.3; (−2.1–66.6)	38.6; (3.3–74.0)	38.9; (12.8–65.0)	16.6; (−22.3–55.4)

HSPT = high-speed power training; SSST = slow-speed Strength training; CON = control; 1RM = one-repetition maximum.
*denotes significant difference from CON.