Effects of the abdominal drawing-in maneuver on hamstring rotational activity and pelvic stability in females
| Autor: | Duk-Hyun An, Jae-Seop Oh, Kyung-Hee Noh, Min-Joo Ko, Min-Hyeok Kang, Won-gyu Yoo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
musculoskeletal diseases
Knee flexion Physical Therapy Sports Therapy and Rehabilitation Electromyography Pelvis 03 medical and health sciences 0302 clinical medicine Medicine Humans Orthopedics and Sports Medicine Tibial rotation Muscle Skeletal Abdominal Muscles Orthodontics 030222 orthopedics medicine.diagnostic_test Tibia business.industry Rehabilitation Muscle activation 030229 sport sciences musculoskeletal system Biomechanical Phenomena External rotation Female business Pelvic rotation Hamstring |
| Zdroj: | Journal of back and musculoskeletal rehabilitation. 35(2) |
| ISSN: | 1878-6324 |
| Popis: | BACKGROUND: The medial hamstring (MH) and lateral hamstring (LH) can be selectively trained through tibial internal and external rotation during prone knee flexion. However, no study has identified how a combined tibial rotation and lumbo-pelvic stability strategy influences MH and LH muscle activities. OBJECTIVE: To investigate the combined effects of tibial rotation and the abdominal drawing-in maneuver (ADIM) on MH and LH muscle activities as well as pelvic rotation during prone knee flexion. METHODS: Fifteen female volunteers performed prone knee flexion with tibial internal and external rotation, with and without the ADIM. Under each condition, MH and LH muscle activities were measured by surface electromyography (EMG), and the pelvic rotation angle by a smartphone inclinometer application. RESULTS: The results showed increased MH (without the ADIM: p< 0.001, effect size (d) = 2.05; with the ADIM: p< 0.001, d= 1.71) and LH (without the ADIM: p< 0.001, d= 1.64; with the ADIM: p= 0.001, d= 1.58) muscle activities under internal and external tibial rotation, respectively. However, addition of the ADIM led to increased MH (internal tibial rotation: p= 0.001, d= 0.67; external tibial rotation: p= 0.019, d= 0.45) and LH (internal tibial rotation: p= 0.003, d= 0.79; external tibial rotation: p< 0.001, d= 1.05) muscle activities combined with reduced pelvic rotation (internal tibial rotation: p< 0.001, d= 3.45; external tibial rotation: p< 0.001, d= 3.01) during prone knee flexion. CONCLUSIONS: These findings suggest that the ADIM could be useful for reducing compensatory pelvic rotation and enhancing selective muscle activation in the MH and LH, according to the direction of tibial rotation, during prone knee flexion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|