Plyometric Training Boosts Explosive Power, Speed, and Leanness in Trained Athletes

Explosive power, speed, and agility are foundational to success in competitive sport, yet traditional resistance training alone may not fully develop these qualities. Plyometric training—characterized by rapid stretch-shortening cycle movements—has long been used to bridge this gap, but rigorous synthesis of its effects across diverse athletic populations has been lacking. This meta-analysis provides the most comprehensive evidence to date on plyometrics' impact in trained adults.

Researchers conducted a systematic search of PubMed, EMBASE, Cochrane, Web of Science, and Scopus databases through May 2025, identifying 70 randomized controlled trials that met strict inclusion criteria: healthy, athletically trained adults aged 18–40 with at least one year of regular training, compared against non-plyometric control groups. Methodological quality was evaluated using the Cochrane ROB-2 tool, and evidence certainty was graded using the GRADE framework. Statistical pooling was performed in RevMan 5.4.1, with subgroup analyses by sport type, training frequency, and intervention duration.

The results were consistently favorable for plyometric training. Lower-limb strength improved significantly (1RM squat: SMD = 0.53). Vertical jump performance showed robust gains across multiple tests: countermovement jump (CMJ: SMD = 0.69), squat jump (SJ: SMD = 0.47), and arm-assisted CMJ (CMJ-A: SMD = 0.83). Sprint performance improved at all tested distances—10m (SMD = −0.50), 20m (SMD = −0.53), and 30m (SMD = −0.57). Reactive strength index increased markedly (SMD = 0.80), as did standing long jump (SMD = 1.34, the largest effect observed). Agility improved on both the Illinois agility test (SMD = −0.64) and T-test (SMD = −0.41). Body fat percentage was significantly reduced (SMD = −0.71), suggesting favorable body composition changes even in already-trained individuals.

These findings carry strong practical implications for coaches and sports scientists working in explosive sports such as football, basketball, sprinting, and rugby. The breadth of outcomes improved—spanning strength, power, speed, agility, and body composition—positions plyometrics as a uniquely efficient training modality. The inclusion of subgroup analyses by sport type and training parameters adds nuance, helping practitioners tailor protocols to specific athletic demands.

Several caveats temper the conclusions. Considerable heterogeneity existed across studies in terms of training volume, exercise selection, and competitive level, which complicates direct comparisons. Publication bias cannot be entirely excluded despite funnel plot and Egger's test assessments. Additionally, many included studies had relatively short intervention durations, and long-term effects in elite populations remain unclear. The restriction to English-language RCTs may also have excluded relevant evidence from other languages or study designs.