• The 3 Biggest Mistakes Swim Coaches Make With Shoulder Injury Prevention! The following article is a guest post by Dr. John Mullen, DPT, CSCS a World renowned expert and speaker in sports training and rehabilitation. He received his Doctorate in Physical Therapy at USC where he performed research on swimming biomechanics and lung adaptations in swimming training. Many think swim coaches prescribe adequate shoulder injury prevention. […] August 9, 2016