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Context: Deep friction massage (DFM) is often used in the treatment of tendinopathies; however, the pressure applied may vary and interfere with the obtained results. Objective: To assess whether the immediate effects of DFM on pain (pain intensity and time to onset of analgesia) and muscle strength are dependent on the pressure applied during the DFM application in athletes with patellar tendinopathy. Design: Randomized, controlled, cross-over trial. Setting: University research laboratory (institutional). Participants: Ten athletes with diagnosis of unilateral patellar tendinopathy (age 27.90 [5.24] y). Interventions: All participants attended 4 sessions, 3 treatment sessions with DFM applied with different pressures (the mean pressure—previously determined for each participant—and the mean pressure ± 25%) and a control session, each of which was separated by 48 hours. Main Outcome Measures: Pain (intensity upon palpation and time to onset of analgesia), and muscle strength of knee extensors were assessed before and immediately after each session. Results: Pain intensity changed significantly over time (F1,9 = 52.364; P < .001;
Chaves, Paço, Silva, and Pinho are with the Institute of Research and Advanced Training in Health Sciences and Technologies, CESPU, Gandra, Portugal. Simões is with Santa Maria Health School, Porto, Portugal. Pinho is also with the School of Health Sciences, University of Aveiro, Aveiro, Portugal. Duarte is with the Research Centre in Physical Activity, Health and Leisure, Faculty of Sport, University of Porto, Porto, Portugal. Ribeiro is with the School of Health Sciences and Institute of Biomedicine—iBiMED, University of Aveiro, Aveiro, Portugal.