Efficacy of Plyometric Training Isometric Strength Training on Quadriceps Strength and Functional Performance.

Effects of Plyometric Training vs. Isometric Strengthening of Quadriceps on Strength, Sprint Test, and Single-Leg Triple Hop Test in Soccer Players

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT05056792

Acronym

Isometric

Enrollment

Registered

2021-09-27

Start date

2021-01-30

Completion date

2022-08-28

Last updated

2022-11-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Football Players

Keywords

Strength Resisted sprint training, Plyometric training, Function performance, Resisted sprint training

Brief summary

This study aims to investigate the influence of an eight-week plyometric and quadriceps strength training program on muscular strength, sprint, and functional performance in collegiate football players.

Detailed description

Sixty collegiate football players aged 18-25 years were recruited, at the university campus. All of them were randomly divided into two experimental and control groups that participated in training for six weeks on alternate days (i.e., three sessions per week), and one control group (n=30) did not train. The control group was instructed to maintain regular activities and avoid any strenuous physical activity during the study. Under the Declaration of Helsinki, participants were informed about the study's possible risks and benefits, and all participants signed informed consent before participation in the study. The ethical sub-committee of the College of applied medical science, Majmaah, Saudi Arabia approved this study (Ethics Number: MUREC-Jan. 25/COM-2021 / 19-5).

Interventions

OTHERIsometric strength training for 8 week

Plyometric training for 8 week

OTHERConventional training

Conventional training for 8 week

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

PREVENTION

Masking

DOUBLE (Subject, Caregiver)

Masking description

Randomized

Intervention model description

Randomized controlled trial

Eligibility

Sex/Gender

MALE

Age

18 Years to 25 Years

Healthy volunteers

Yes

Inclusion criteria

• Young players aged between 18 and 25 years required frequent sprinting

Exclusion criteria

* Current injury to the lower limb. * Surgery affecting lower limb function. * Any cardio-respiratory diseases. * Impairments of the spine or lower extremities.

Design outcomes

Primary

Measure	Time frame	Description
Maximal Voluntary Isometric Contraction Strength (STN)	After 8 weeks of intervention	Pretest and post intervention strength measure.
Sprint Test (ST)	After 8 weeks of intervention	Pretest and post intervention sprint measure.
Single-Leg Triple Hop Test (SLTH)	After 8 weeks of intervention	Pretest and post intervention single-leg triple hop measure.

Countries

Saudi Arabia

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026