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Most Effective Knee Joint Angle Pair for Isometric Exercise

NCT07207135 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 44

Last updated 2025-10-03

No results posted yet for this study

Summary

This study investigated the effects of isometric exercises applied to the quadriceps and hamstring muscles at different knee joint angles on balance, joint position sense, and functional performance in healthy individuals. Thirty participants aged 20-30 years were randomized into four groups and performed an eight-week training program, three times per week. Outcome measures included the Y Balance Test, digital goniometer assessments for joint position sense, and functional performance tests (stair climb and 30-second sit-to-stand). The results aim to identify which knee joint angles are most effective for improving neuromuscular function and may guide future rehabilitation and training protocols.

Conditions

  • Isometric Exercise
  • Exercise Training
  • Musculoskeletal Function
  • Balance, Proprioception, and Functional Performance
  • Healthy Volunteers

Interventions

OTHER

Isometric Exercise at 15° and 90° Knee Angles

Participants performed quadriceps and hamstring isometric contractions at 15° and 90° of knee flexion. Each contraction lasted 10 seconds against resistance, three times per week for eight weeks, with progressive repetitions. Hip and ankle strengthening was also included.

OTHER

Isometric Exercise at 30° and 105° Knee Angles

Same protocol as Group 1, but at 30° and 105° of knee flexion.

OTHER

Isometric Exercise at 45° and 120° Knee Angles

Same protocol as Group 1, but at 45° and 120° of knee flexion.

OTHER

Isometric Exercise at 60° and 135° Knee Angles

Same protocol as Group 1, but at 60° and 135° of knee flexion.

Sponsors & Collaborators

  • Firat University

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
20 Years
Max Age
30 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2024-03-15
Primary Completion
2025-05-12
Completion
2025-05-30

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07207135 on ClinicalTrials.gov