Participants will be planned to participate in therapeutic lumbar exercises in groups of 5, in the morning and at noon, via the Zoom Platform in 40-minute sessions, 3 days a week, with a physiotherapist, for 6 weeks. Additionally, participants will do Rocabado's exercise at home. All exercises will be taught face to face in the first session. Online sessions with the physiotherapist will continue. A 5-minute warm-up and cool-down period and a 30-minute exercise period are planned. Patients will be asked to perform the exercises in 3 sets of 10-15 repetitions and will be allowed to rest for 10 seconds. Every exercise performed unilaterally will be performed bilaterally.

Each exercise will consist of 6 sets and 6 repetitions.

Pelvic tilt exercise:Participant will be supine position on the floor with your knees bent. Flatten your back against the floor by tightening your abdominal muscles and bending your pelvis up slightly. Lumbar flexion(single knee to chest): Participants will be supine position with knees bent and feet flat on the floor. The right knee will be brought closer to your chest and held with the hands. Lumbar flexion(double knee to chest) : Participants will be supine position with both legs flat on the floor. One hip and knee will be bent first to the chest, then the other to the chest. The knees will be grasped with the hands. Straight Leg Raise: Participants will be supine position with hips and legs comfortably on the floor. By contracting the quadriceps muscle the straight leg will be fixed. Inhaling slowly, the straight leg will be lifted six inches off the floor. Spine twist: Participants will turn their hips and knees to one side as much as possible in a supine position.

Pain-free Mouth Opening (PMO):A premeasured mm caliper was attached to each participant's chin as a reference. Each participant will be instructed to open their mouth as wide as possible to the point where there is no pain.Maximum Unassisted Mouth Opening(MAO) It will be defined as the maximum distance a subject can open his mouth without feeling any pain. After the patient opens his mouth wide in this way, mouth opening will be measured.Maximum Assisted Mouth Opening(MAO): Once the patient is this open, the investigator will place his or her fingers on the patient's upper and lower central incisors, forcing the patient's mouth to open wider. Right Lateral Movement (RML)-Left Lateral Movement (LLM): Lateral right and left movements:Lateral right and left movements: For these measurements it is recommended the demarcation of two reference points, on the maxilla and mandible, close to the midline

The Jaw Functional Limitation Scale 20 (JFLS-20) will be used to measure changes in functional disability. The JFLS has 3 subcomponents: mastication, vertical jaw mobility, and emotional and verbal expression. The Jaw Functional Limitation Scale 20 (JFLS20) has a score range of 1 to 200, with higher scores indicating worsening jaw function.

The short-form McGill Pain Questionnaire (SF-MPQ). Descriptors 1-11 represent the sensory dimension of pain experience and 12-15 represent the affective dimension. Each descriptor is ranked on an intensity scale of 0=none, 1=mild, 2=moderate, 3=severe. The Present Pain Intensity of the standard long -form McGill Pain Questionnaire and the visual analogue are also included to provide overall intensity scores.