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Table 1 Strength training descriptors [35] of the exercises performed in the intervention group

From: The Strengthening Exercises in Shoulder Impingement trial (The SExSI-trial) investigating the effectiveness of a simple add-on shoulder strengthening exercise programme in patients with long-lasting subacromial impingement syndrome: Study protocol for a pragmatic, assessor blinded, parallel-group, randomised, controlled trial

  Phase 1 Phase 2 Phase 3
Load magnitude 15–20 RM 10–15 RM 8–10 RM
Number of repetitions To volitional
muscular fatigue
To volitional
muscular fatigue
To volitional
muscular fatigue
Number of sets 3 sets 4 sets (2 per exercise) 6 sets (2 per exercise)
Rest in-between sets 60 s 60 s 60 s
Sessions per week 7 per week 3.5 per week 3.5 per week
Duration of experimental period 5 weeks 5 weeks 6 weeks
Contraction modes per rep    
Concentric 2 s 2 s 2 s
Isometric 5 s 5 s 5 s
Eccentric 2 s 2 s 2 s
Rest between reps 2 s 2 s 2 s
Time under tension 9 s 9 s 9 s
Volitional muscular fatigue Yes Yes Yes
Rest between sessions 24 h 48 h 48 h
Anatomical definition of exercise Yes Yes Yes
Range of movement Exercise 1:
80° ER
Exercise 1:
80° ER
Exercise 2:
45° ABD
Exercise 1:
80° ER
Exercise 2:
45° ABD
Exercise 3:
45° ER