Does Massage Gun or Foam Roller Use During a Warm-Up Improve Performance in Trained Athletes?

Self-myofascial release tools like foam rollers and massage guns are being integrated into athlete warm-ups with increasing frequency, but evidence on their acute effects is limited. Sixteen healthy, trained athletes (23.2 ± 1.3 years; four female) completed three warm-up conditions in a randomised, crossover design separated by >48 h: dynamic warm-up plus foam rolling (FOAM), dynamic warm-up plus massage gun (GUN), and dynamic warm-up alone (CON). After each intervention, participants completed a countermovement jump (CMJ; height and reactive strength index [RSImod]), a 10/5 repeated jump test (RJT), a 20 m sprint, and a knee-to-wall ankle mobility test. Perceived soreness and fatigue were recorded. Linear mixed models and Cohen's <i>d</i> were used to assess between-condition differences. Relative to CON, FOAM and GUN were associated with reduced CMJ height (<i>d</i> = -0.29 to -0.36) and RSImod (<i>d</i> = -0.40 to -0.52; <i>p</i>'s < 0.05). GUN was associated with significantly impaired sprint time (<i>d</i> = 0.34). There were modest improvements in ankle mobility (left side) following FOAM (<i>d</i> = 0.23, <i>p</i> < 0.05) and lower levels of muscle soreness compared to CON (<i>p</i> < 0.05). Despite some improvements in ankle mobility and muscle soreness with foam rolling, both foam rolling and massage gun use may acutely impair aspects of physical performance compared to a dynamic warm-up alone.