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This study will try to answer the following question:
Will adding mini-squat exercises at different angles (30°,45°, and 60°) to leg press exercise influence quadriceps and hamstring strength and H:Q angle in football players?
Recent studies have highlighted the importance of exercise selection and angle specificity in resistance training, showing that different knee angles result in varied activation patterns in the quadriceps and hamstrings. However, current literature offers limited insight into the effects of integrating mini squat exercises with leg press training on injury prevention and functional outcomes in athletic populations. In particular, there is a lack of literature on how such a combined leg press and mini squat exercise at different angles influences the H:Q ratio, lower limb neuromuscular control, and performance in young male football players. Therefore, the present study aims to examine whether incorporating mini squats performed at varying knee flexion angles into a leg press training program can improve muscle balance and lower limb strength in football players. The findings may provide valuable guidance for physiotherapists, coaches, and sports scientists in developing evidence-based, angle-specific exercise protocols tailored to the functional demands of athletes.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Group A (mini-squat at 30° knee flexion and leg press) | Experimental | Fifteen participants will receive mini-squat exercises at 30° knee flexion and leg press exercises |
|
| Group B (mini-squat at 45° knee flexion and leg press) | Active Comparator | Fifteen participants will receive mini-squat exercises at 45° knee flexion and leg press exercises |
|
| Group C (mini-squat at 60° knee flexion and leg press) | Active Comparator | Fifteen participants will receive mini-squat exercises at 60°and leg press exercises |
|
| Group D (Control group: leg press exercise program only) | Placebo Comparator | Fifteen participants will receive leg press exercise program only. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| mini-squat exercises at 30° | Procedure | mini-squat exercises at 30° knee flexion and leg press exercises |
|
| Measure | Description | Time Frame |
|---|---|---|
| Measurement of quadriceps strength |
| 1.5 months |
| Measurement of hamstrings muscle strength | All previously described quadriceps muscle evaluation procedures will be applied for the hamstrings muscle strength test; however, the range of motion will be set from full knee extension, and the participant will be instructed to actively bend the knee against the resistance of the device to 90° | 1.5 months |
| Hamstring to quadriceps H:Q ratio calculation | The H-Q ratio refers to the relative strength of the hamstring muscles compared to the quadriceps, typically measured under isokinetic conditions (at the same angular velocity). It is calculated as the maximal concentric knee flexion strength divided by maximal concentric knee extension strength. | 1.5 months |
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Inclusion Criteria:
Exclusion Criteria:
Male football players aged between 18-30 years
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| Name | Affiliation | Role |
|---|---|---|
| Prof.Dr.Nasr Abdelkader | Cairo Univesity | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Jazan University Hospital | Jizan | Saudi Arabia |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot_SAP_ICF | Yes | Yes | Yes | Study Protocol, Statistical Analysis Plan, and Informed Consent Form | Mar 1, 2025 |
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| mini-squat exercises at 45° | Procedure | mini-squat exercises at 45° knee flexion and leg press exercises |
|
| mini-squat exercises at 60° | Procedure | mini-squat exercises at 60°and leg press exercises |
|
| leg press exercise | Procedure | leg press exercise program only |
|
| Jan 10, 2026 |
| Prot_SAP_ICF_000.pdf |
| ID | Term |
|---|---|
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001519 | Behavior |
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