SHOULDER ASSESSMENT SERIES PART 30: LOWER TRAPEZIUS STRENGTH TESTING The lower trapezius muscle is often observed to be weak in patients with scapular dyskines or the activation ratio between the upper traps and the lower traps is said to be shifted towards an overpowering upper trapezius. Patients who have a severely weak lower trap muscle display scapular tipping, especially if these patients have a tight pectoralis minor at the same time. However, the scapula needs a certain level of backward