This intervention will include 8 sessions in 8 weeks, once a week. Each session will last between 25 to 35 minutes and will be divided into two components: core stability exercises and stretching of the trunk and lower limbs.

Core Stability Exercises: These will consist of isometric exercises maintained for 7-8 seconds, 8-12 repetitions, 1 set, with brief rest intervals of 3 seconds between repetitions and 30 seconds to 1 minute between exercises. Exercises will include abdominal hollowing, side bridge (both sides), supine extension bridge, lower limb extension from prone (both sides), and alternate arm and leg raise from quadruped.

Stretching Exercises: Participants will perform muscle stretching exercises, holding the maximum stretch for 30 seconds to 1 minute, and returning to the original position, followed by 5 to 10 seconds of rest. Each exercise will be repeated two to three times. Stretches will target the hamstrings, iliopsoas, piriformis, and tensor fasciae latae.

This intervention will include 16 sessions of an aquatic-exercise program, twice a week, over 8 weeks at a water temperature between 32-34°C. Each session will be conducted in groups of 8 to 12 patients and will last about 45 minutes.

The aquatic exercise sessions will include a warm-up phase: walking forwards, sideways, and backwards; a training phase: active range of motion exercises for the spine, upper and lower limbs; aerobic exercises with jumps and static running at various speeds; muscle strengthening, 8-12 repetitions, 1-2 sets, 8-10 exercises including hip flexion, extension, adduction, and abduction, knee flexion and extension, knee cycling, shoulder flexion, extension, and abduction, elbow flexion, extension, and pronation-supination, squatting, and stretching exercises for the neck, trunk, and limbs; and a relaxation/cool-down phase: including lying supine and low-impact exercises such as slow walking, squatting, and standing.

This intervention will include 16 sessions of an aquatic-exercise program, twice a week, over 8 weeks at a water temperature between 32-34°C. Each session will be conducted in groups of 8 to 12 patients and will last about 45 minutes.

Quantitive variable evaluated with Visual Analogue Scale (Minimum: 0; Maximum 10). Higher values correspond to worse outcome.

Quantitive variable evaluated with Oswestry Disability Index - version 2.0. (Minimum: 0; Maximum 100). Higher values correspond to worse outcome.

Quantitive variable evaluated with MOS Short Form Health Survey 36 Item v2. (Minimum: 0; Maximum 100). Higher values correspond to better outcome.

Quantitive variable evaluated with Modified-Modified Schober Test.

Quantitive variable evaluated with Tampa Scale of Kinesiophobia-13. (Minimum: 13; Maximum 52). Higher values correspond to worse outcome.