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The back squat is a commonly utilized resistance training exercise for the promotion of both performance and musculoskeletal health. There are a range of manipulations that can be made to the setup of this resistance exercise, with once such adaptation being the stance width when performing the exercise. This intervention aims to explore the effects of increasing the stance with on performance indices in elite rugby league players.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Normal stance width | Active Comparator | Those assigned to this group will complete their pre-season training as normal i.e. when performing their squat exercises they will do so using their habitual (self-selected) stance width. |
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| Wide stance width | Experimental | Those assigned to this (i.e. experimental) group will also complete their pre-season training as normal, the only exception will be that when performing their squat exercises they will increase their stance width by 20% compared to their self-selected stance width. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Normal stance width | Behavioral | Normal self-selected stance width when performing squat exercises. |
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| Measure | Description | Time Frame |
|---|---|---|
| 505 agility test | Test of 180 degree turning ability, measured using timing gates. | Baseline |
| 505 agility test | Test of 180 degree turning ability, measured using timing gates. | 8-weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Body mass | Body mass using a weighing scale. | Baseline |
| Body mass | Body mass using a weighing scale. | 8-weeks |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Central Lancashire | Preston | Lancashire | PR4 0PE | United Kingdom |
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Stratified to include similar number of forward and backs in each arm.
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| Wide stance width | Behavioral | Increased stance with (by 20% over their own self-selected stance width) when performing squat exercises. |
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| Sum of skinfold thickness | Skinfold thicknesses measured using callipers at eight sites according to the International Society for the Advancement of Kinanthropometry (ISAK) restricted profile (triceps, subscapular, biceps, iliac crest, supraspinal, abdominal, mid-thigh, and medial calf) | Baseline |
| Sum of skinfold thickness | Skinfold thicknesses measured using callipers at eight sites according to the International Society for the Advancement of Kinanthropometry (ISAK) restricted profile (triceps, subscapular, biceps, iliac crest, supraspinal, abdominal, mid-thigh, and medial calf) | 8-weeks |
| Three repetition maximum squat strength | The maximum squat weight that can be lifted for a total of three repetitions | Baseline |
| Three repetition maximum squat strength | The maximum squat weight that can be lifted for a total of three repetitions | 8-weeks |
| Counter movement jump height | The maximum height that can be jumped vertically, measured using a jump mat. | Baseline |
| Counter movement jump height | The maximum height that can be jumped vertically, measured using a jump mat. | 8-weeks |