The vibration frequency range was 30–40 Hz, the amplitude was 1.7–2.5 mm, and acceleration was 3.0–5.7 g. The training protocol is shown in Table 2. In isometric exercise the athletes were required to maintain a static squat position bending their knees at an angle of 2.27 rad, which was standardized using a goniometer. Conventional and vibration exercises were combined in circuit-type resistance training. The same exercises without vibration in the control group training was performed on the floor.