NCT07398547

The Effect of Training Frequency on Explosive Strength in Adolescent Tennis Players During a Six-Week Functional Training Program

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Biruni University · Academic / Other
• Sex: All
• Age: 12 Years – 18 Years
• Healthy volunteers: Accepted

Summary

Adolescence is a period characterized by rapid growth and development, characterized by intense structural, functional, and neuromuscular changes in the musculoskeletal system. The rapid height growth and proportional changes that occur during this period can negatively impact athletic performance by disrupting muscle strength and flexibility. Deficiencies in lower extremity muscle strength, in particular, can lead to decreased performance and increased injury risk in sports requiring high agility, balance, and explosive power, such as tennis. Functional training programs are holistic exercise approaches that aim to improve neuromuscular control, balance, coordination, and muscle strength by simultaneously training multiple muscle groups. This type of training is particularly important in adolescent athletes because it supports the development of strength, endurance, and explosive power. Training frequency, in turn, plays a decisive role in muscle adaptation and performance enhancement by influencing the balance between loading and recovery. Literature contains limited studies directly examining the effects of functional training frequency on explosive power performance in young athletes. Most existing research has focused on adult or professional athletes, and experimental studies comparing the effects of different training frequencies in adolescent tennis players are insufficient. In this context, the aim of our study was to examine the effects of a six-week functional training program implemented at different training frequencies on lower extremity explosive strength parameters in adolescent tennis athletes.

Detailed description

Adolescence is a dynamic period accompanied by rapid growth and development, characterized by intense structural, functional, and neuromuscular changes in the musculoskeletal system. During this period, weakness in the lower extremity muscles can lead to decreased performance and increased injury risk in sports requiring agility, balance, and explosive power, such as tennis. Functional training programs are comprehensive exercise approaches that improve neuromuscular coordination, balance, and stabilization by simultaneously activating multiple muscle groups. These types of training are particularly important for young athletes because they support sport-specific movement patterns, increase muscle strength, and optimize the energy transfer chain. Training frequency is a key variable in determining muscle adaptation, recovery time, and load balance. Therefore, studies examining the effects of different training frequencies on explosive power development in young tennis athletes are of great scientific and practical value. Healthy adolescent tennis players who volunteer to participate will be included in the study. After recording demographic and sport-specific information, participants' explosive strength performance will be assessed using the Countermovement Jump (CMJ), Squat Jump (SJ), Single Leg Jump (SLJ), and Reactive Strength Index (RSI) tests. Participants will be randomly assigned to two groups: the first group will participate in a 60-minute functional training program once a week, and the second group will participate in a 60-minute functional training program three times a week. The programs will last six weeks, and all sessions will be conducted by the same physiotherapist. Assessments will be conducted before and after the six-week training program. The study employed a two-group, pretest-posttest design. This study aims to demonstrate the effects of different training frequencies on explosive strength development in adolescent tennis athletes, contributing to the scientific basis of training plans for young athletes and to optimize performance.

Conditions

• Exercise Therapy

Interventions

Type	Name	Description
OTHER	High-Frequency Functional Training Group (HFFT)	Participants in this group performed the same functional training program three times per week for six consecutive weeks. Each 60-minute session followed the same structure as the low-frequency program and was conducted under identical supervision and environmental conditions.
OTHER	Low-Frequency Functional Training Group (LFFT)	Participants in this group performed the same functional training program once per week for six consecutive weeks. Each 60-minute session followed the same structure as the low-frequency program and was conducted under identical supervision and environmental conditions.

Timeline

• Start date: 2026-02-10
• Primary completion: 2026-03-30
• Completion: 2026-04-05
• First posted: 2026-02-10
• Last updated: 2026-02-10

Locations

1 site across 1 country: Turkey (Türkiye)