Six Weeks of High-Intensity Interval Training vs. Small-Sided Games: Effects on Physical Performance in Female Basketball Players

High-intensity interval training (HIIT) and small-sided games (SSG) are popular conditioning tactics in team sports, but their relative efficiency among female basketball players is uncertain. The aim of this study was to examine and compare the effects of a six-week HIIT and SSG intervention on the physical performance of elite female basketball players. Forty-four participants (20.98 ± 4.58 years) were randomly assigned to one of three groups: HIIT (n = 14), SSG (n = 14), or control (n = 16). Pre- and post-intervention evaluations assessed sprint performance (0–10, 0–20, 0–30 m), agility (Pro-agility, Zig-zag, 9-6-3-6-9 tests), vertical jump height (CMJ, CMJA, SJ), repeated sprint ability (RSA), and aerobic capacity (VO2max, VIFT, MAS). HIIT and SSG significantly improved all performance measures compared to the control group (p < 0.001, ηp2 = 0.365–0.809); however, there were no significant differences between the two experimental groups. HIIT had a slightly greater effect on linear sprinting, but SSG was more effective for agility and aerobic performance. Body composition remained unchanged. These data suggest that HIIT and SSG are both effective training methods for improving speed, agility, explosive power, RSA, and aerobic capacity in female basketball players. Incorporating both strategies into an organized training program can improve sport-specific performance and overall conditioning.