Effects of Body Mechanics Training on Shoulder-Back Pain and Breastfeeding Ergonomics in Breastfeeding Mothers

Inclusion Criteria: * Mother should be 18 years of age or older * Have given birth vaginally * Mother should be breastfeeding * Have good general physical health (no health problems), * Have no physical disabilities * Have no chronic disease (no circulatory, respiratory, endocrine, etc.) * Have not received any physical therapy or manual therapy in the last 6 months * Have no history of chronic pain related to the musculoskeletal system (fibromyalgia, chronic low back or neck pain, etc.) * Have a BMI between 18.5 and 24.9 * Have a healthy newborn * Plan to continue breastfeeding during the study period * Have no past or current health problems that may affect breastfeeding (breast surgery, use of medications that may affect breastfeeding, etc.) * The most less than primary level education Exclusion Criteria: * Mothers with any medical history * Mothers with postural problems (previously diagnosed serious postural disorders such as scoliosis, kyphosis or lordosis) * Having an orthopedic or neurological disorder diagnosed before or during pregnancy (herniated disc, nerve compression) * Having had a Caesarean section * Mothers not wanting to breastfeed * Mothers not wanting to participate in the study * Situations where the mother and baby must be separated * Mothers planning to start a different exercise program during the study