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Brian Schiff’s Blog

Injury Prevention, Sports Rehab & Performance Training Expert

All effective prehab and rehab programs for recreational and competitive athletes should include single leg stability exercises.  I like to use sliding exercises as one way to improve neuromuscular control of the core, hip and knee.  Frontal plane collapse is a common issue with respect to knee dysfunction.  Using sliders/gliding discs as well as theraband is an excellent way to improve strength and kinetic chain control.  Below is an exercise i recently featured for Personal Fitness Professional:

This exercise is effective in injury prevention and rehab programs for those with ankle instability, anterior knee pain, hip weakness, poor landing mechanics and higher ACL risk if playing pivoting and cutting sports.  It will improve core stability, hip and knee strength/stability, dynamic balance, groin flexibility and trunk control.

The band serves to enhance activation of the hip external rotators and further challenge stability of the hip and knee.  The band should not pull too forcefully, but just enough to cue the desired muscle activation pattern.  A slower cadence on the eccentric portion of the exercise is preferable to maximize stability and strength gains.  Do not force through any painful ranges of motion, and remember that form and alignment are paramount so limit the reaching based on the client’s ability to maintain adequate control.

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This exercise is an excellent way to increase hip disassociation and more specifically hamstring flexibility.  Foam rolling and/or myofascial compression therapy prior to stretching may further enhance range of motion.  This exercise can be used with runners and clients struggling with tendonitis, IT band issues and patellofemoral pain.  It is also helpful in eliminating asymmetry that appears on the active straight leg raise on the FMS.

This exercise can be used as part of a mobility workout, warm-up, regeneration day or at the end of a workout. Remember that maximally dorsiflexing the foot will increase dural tension and place more stretch across the back of the knee.  So, relaxing the foot (or placing the rope more along the mid foot) will reduce this tension and allow for a more concentrated stretch in the hamstring.  For clients with a history of sciatica, I would suggest avoiding the stretch with the foot in full dorsiflexion as a general precaution.

I see plenty of pitchers in my clinic ranging from 12 y/o travel baseball players to MLB guys. My own son is a left handed pitcher so I am always carefully watching his mechanics, pitch count and arm care. There has been much written about glenohumeral internal rotation deficit (GIRD) and total shoulder motion over the years.

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Today, I wanted to recap a nice article that was recently published in the American Journal of Sports Medicine by Wilk et al. looking at deficits in glenohumeral passive range of motion (PROM) and the increase in elbow injury risk.

This prospective study was done over an 8 year period from 2005-2102 and looked at PROM of both throwing and nonthrowing shoulders of all major and minor league pitchers within a single baseball organization. The measurements were taken with a bubble goniometer during spring training. See images below from the journal article for how measurements were taken:

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In sum, 505 exams were performed on 296 pitchers. Motion was assessed in supine with the arm abducted to 90 degrees and the arm in the plane of the scapula.  One examiner stabilized the scapula, while another measured total rotation and passive flexion. Elbow injuries and days missed because of injuries were assessed and recorded by medical staff. Throwing and nonthrowing measurements were compared, while additional testing was done to find significant associations between shoulder motion and elbow injury, as well as odds of an elbow injury.


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Facilitating better lower leg stability is always a priority in my rehab and training programs. I have long been an advocate of single leg training to resolve asymmetry and reduce compensations and injury risk. Once a client masters form on the ground, adding in more proprioceptive challenges can take their training to a new level.

Today I wanted to share a previously unpublished video I shot for my ‘Functionally Fit’ column that demonstrates a single leg squat exercise on the BOSU Elite Trainer. It is a relatively new exercise tool that offers some tweaks on the original BOSU balance trainer.