Comparison of Combined Sprint-Plyometric Training Versus Traditional Strength Training on Speed, Agility, Power, and Movement Quality in Intermediate Rugby Players: A Randomized Controlled Trial

This randomized controlled trial compares combined sprint-plyometric training (Group A) versus traditional strength training (Group B) in 64 intermediate-level rugby players (aged 18-25 years). Both interventions are delivered over 8 weeks at 2 sessions per week. Primary and secondary outcomes include speed (40 m and 80 m sprint via electronic timing gates), agility (T-Test), lower-body explosive power (Standing Long Jump), and movement quality (Functional Movement Screen), assessed at baseline and post-intervention. Randomization is performed via computer-generated sequence.

Inclusion Criteria:

1. Male and female athletes aged 18-25 years
2. A minimum of 2 years of structured rugby training experience
3. Actively training at least 3 hours per week
4. Medically cleared to engage in high-intensity physical activity
5. Willingness to participate and provide written informed consent

Exclusion Criteria:

1. History of moderate or severe musculoskeletal injuries or surgery within the past 6-12 months
2. Not medically approved to engage in high-intensity physical activities
3. Cardiovascular or cardiopulmonary disease or risk factors that contraindicate high-intensity training
4. Participation in any additional structured strength or plyometric program outside the study protocol during the intervention period

The outcome assessor is blinded to group allocation. Participants and the treating physiotherapist/coach are not blinded due to the nature of the intervention.