An interventional study of Recovery Training Group in Healthy Tennis Players, sponsored by Biruni University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 11 Years to 18 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-04-28.
Sponsored by Biruni University · Not applicable, Interventional, and Treatment
This study was designed to examine the effects of recovery training on lower extremity explosive strength performance in tennis players. Recovery methods are known to play an important role in reducing muscle fatigue, accelerating the recovery process, and decreasing the risk of injury among athletes. However, the effects of recovery training on lower extremity explosive strength in tennis players have not been sufficiently investigated in the literature.
This study will be conducted as a randomized controlled experimental design. Volunteer athletes aged 11-17 who regularly play tennis will be included in the study. Participants will be randomly divided into two groups: the control group will continue only their regular tennis training, while the experimental group will receive additional recovery training along with their routine tennis sessions. Lower extremity explosive strength will be evaluated using the countermovement jump, squat jump, reactive strength index (RSI), standing long jump, single-leg hop, and single-leg vertical jump tests. Measurements will be performed before and after the six-week training period.
The findings obtained from this research will scientifically reveal the contribution of recovery training to performance improvement in tennis players and provide evidence-based insights for optimizing athlete health and training program design.
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Exclusion Criteria:
Participants in this group will continue their regular tennis training
Participants in this group will continue their regular tennis training and additionally perform recovery training twice a week for four weeks. The recovery sessions include stretching, foam rolling, and relaxation exercises designed to enhance recovery and improve lower extremity explosive strength.
Other: Recovery Training Group
Participants in this group will continue their regular tennis training and additionally perform recovery training twice a week for four weeks. The recovery sessions include stretching, foam rolling, and relaxation exercises designed to enhance recovery and improve lower extremity explosive strength.
Countermovement Jump Height
The countermovement jump (CMJ) test was used to assess lower extremity explosive performance. Participants started from an upright standing position with hands placed on the hips. Following a rapid downward movement involving hip and knee flexion, participants immediately performed a maximal vertical jump. Jump height (cm) was recorded using \[measurement device - e.g., force plate / jump mat / Optojump system\]. The CMJ reflects the efficiency of the stretch-shortening cycle and is considered a reliable indicator of explosive lower limb performance.
Time frame: 4 weeks
Squat Jump Height
The squat jump (SJ) test was used to assess concentric lower extremity explosive performance. Participants started from a semi-squat position with approximately 90° of hip and knee flexion, with hands placed on the hips. After holding this position briefly to eliminate the contribution of elastic energy, participants performed a maximal vertical jump without a preparatory countermovement. Jump height (cm) was recorded using \[measurement device - e.g., force plate / jump mat / Optojump system\]. The SJ test allows direct evaluation of concentric muscle power of the lower limbs.
Time frame: 4 weeks
Reactive Strength Index
RSI is a performance measure that reflects reactive strength and neuromuscular efficiency. It is typically assessed through a drop jump in which the participant steps off a platform, lands, and performs a quick rebound jump with minimal ground contact time. RSI is sensitive to the athlete's ability to rapidly switch from eccentric to concentric action, a capacity highly relevant to sports requiring explosive changes in direction, such as tennis .
Time frame: 4weeks
Standing Long Jump
SLJ, also known as the broad jump, is a field-based test for assessing horizontal explosive strength of the lower extremities. The participant stands with feet shoulder-width apart, swings the arms, and jumps forward as far as possible. The landing distance, measured from the starting line to the heel mark, reflects the ability of the lower-limb muscles to generate forward propulsion .
Time frame: 4 weeks
Single-Leg Hop for Distance
SLH test evaluates unilateral lower-limb performance and limb symmetry. The participant stands on one leg, performs a maximal forward hop, and lands on the same leg while maintaining balance for at least two seconds. Distances are recorded for both legs, and comparisons provide valuable insights into side-to-side asymmetries, rehabilitation status, and injury risk.
Time frame: 4 weeks
Single-Leg Vertical Jump Height
The single-leg vertical jump (SLVJ) test was used to assess unilateral lower extremity explosive performance. Participants stood on one leg with hands placed on the hips, while the non-supporting leg was flexed and held stationary. From a stable standing position, participants performed a maximal vertical jump using the supporting leg only. Jump height (cm) was recorded separately for each limb using \[measurement device - e.g., force plate / jump mat / Optojump system\]. This test allows evaluation of unilateral vertical force production and identification of inter-limb asymmetries.is .
Time frame: 4 weeks
This study is completed, as verified in Apr 2026. You cannot join it, but the record below documents what was studied.
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