DOS 2019

208 · DOS Abstracts Is progressive resistance training feasible in patients with symptomatic external snapping hip? Troels Kjeldsen, Inger Mechlenburg, Susan Merrild Drejer, Lisa Reimer, Lars Grøndahl Hvid, Ulrik Dalgas Department of sport science, Aarhus University; Department of orthopaedic surgery, Aarhus University Hospital; Department of orthopaedic physical ther- apy, Silkeborg Hospital Background: Little is known about the feasibility of progressive resistance training (PRT) applied to patients with symptomatic external snapping hip (SESH). In related hip disorders, PRT has proven to be feasible with high training adherence. Purpose / Aim of Study: The primary purpose was to investigate whether PRT is feasible in patients with SESH and secondary, to explore potential effects of PRT on hip pain, hip-related function, awareness of the hip joint and muscle strength. Materials and Methods: Nine patients with SESH were recruited for a 12- week supervised PRT intervention. Feasibility was measured by drop-out rate, adverse events, pain exacerbation (VAS) and adherence to the PRT. At base- line and at end of treatment patients completed the Copenhagen Hip and Groin Outcome Score (HAGOS), the Forgotten Joint Score (FJS), maximal voluntary contraction strength (MVC) for isometric, concentric and eccentric hip abduc- tion and extension, one-repetition-maximum strength (1RM), and a loaded stair test (LST). Findings / Results: Three patients (33%) dropped out during the PRT inter- vention. Few and minor adverse events were observed. Pain scores were ac- ceptable (VAS < 50 mm) in 76% of all training sessions and a significant overall decrease in pain during PRT was found (-10.5 mm, 95% CI [-17.7 to -3.2]). Training adherence was 96.7 ± 4.2%. Per protocol analyses showed statistically significant and clinically relevant improvements (p ≤ 0.05) in all HAGOS sub- scales (ranging from 27.5 to 41.7 points), FJS (+31.6 points), MVC strength for the most affected hip in concentric (+12.8%) hip abduction and isometric (+27.2%), concentric (+21.5%) and eccentric (+12.4%) hip extension, 1RM strength in leg press (+53.5%) and hip abduction for the most affected hip (+100.2%) and the least affected hip (+66.7%), and time to complete the LST (-25.4%). Conclusions: PRT seems feasible in patients with SESH. Furthermore, the pres- ent study suggests that PRT may improve hip pain, function, awareness and muscle strength in these patients. 165.