Effects of Mid-Season Camp Period Loading on Sports Injury Anxiety and Physical Performance

Quadriceps femoris muscle strength will be assessed by the Lafayette manual muscle tester (Lafayette Instrument Company, Lafayette IN, USA). This device is a valid and reliable method that is frequently used in the assessment of muscle strength.Before the assessment, participants will be asked to sit unsupported on the treatment bed and keep the knee of the extremity to be measured at 90° flexion. During the assessment, participants will be asked to perform maximum isometric contraction for 3 seconds with the muscle in which the muscle strength will be evaluated against the resistance to be applied with a manual muscle tester. The assessments will be repeated three times with one-minute intervals for the dominant side, and the average of the measured values will be used for analysis.

Flexibility will be assessed by the sit-and-reach test. The testing box will be fixed to the wall, and participants will be asked to sit with their knees extended and the soles of their feet against the testing box. Then, participants will be asked to slowly reach forward as far as possible along the top of the box and to hold the position for two seconds without bending their knees. The average of the two trials will be used for analysis.

Dynamic balance will be assessed by the Y balance test. The test is a valid and reliable method that was developed as a version of the star excursion balance test. Before the assessment, three tape measures will be positioned at 135° between the anterior direction and the posterolateral/posteromedial directions. The measurement will be done for the dominant side three times and the average of the endpoints that the participants could reach will be used for data analysis. Reach distances will be normalized to limb length by calculating the maximized reach distance (in the percentage of maximized reach distance) using the formula (excursion distance/limb length) × 100 = percentage of maximized reach distance. The composite score will be calculated by taking the sum of three reach directions divided by three times the limb length then multiplied by 100. The mean value for the Y balance composite score will be used for analysis.

Single-leg jump will be assessed by the single-leg jump test. The test is a valid and reliable method used in the assessment of jump performance in many studies. The participants will be asked to perform a single deep squat with a pause, followed by a vertical jump to maximum height with the dominant leg on the floor. This test will be performed three times for the dominant leg and the highest distance will be used for analysis.

Agility will be assessed by the t-test. The t-test is a valid and reliable method used in the assessment of agility performance. For this test, an agility circuit will be created with four cones named 1, 2, 3, and 4. Cones will be placed at a distance of 9.14 m between 1 and 2, and 4.57 m between 2 and 3, and 2 and 4. At the "go" command, the participant will run forward as quickly as possible from cone 1 to cone 2, sidestepped to cone 3, sidestepped to cone 4, sidestepped to cone 2, then will run back as quickly as possible to cone 1. A stopwatch will be used during the test. All participants will perform the test 2 times with at least 2-minute rest periods between trials. The average of the two trials will be used for analysis.

Sprint performance will be assessed by the 20-m sprint test. The test is a valid and reliable method used in studies to assess sprint performance. During the test, at the "go" command, the participants will be asked to complete the 20-meter distance as quickly as possible, and a stopwatch will be used to determine the time to complete the test. All participants will perform the test two times with at least two minute rest periods between trials. The average of the two trials will be used for data analysis.