www.erichammertherapy.ca – London Ontario Canada (Old South) Registered Physiotherapist Eric Hammer talks about contracting the deep neck flexor muscles in sitting. website – http://www.erichammertherapy.ca Subscribe for free video on improving posture – http://www.hammerphysiotherapy.com/fr... Grounding Exercises for Therapists – http://www.hammerphysiotherapy.com/co…. Tele-Therapy – http://www.hammerphysiotherapy.com/se…. Disclaimer Notice Warning: All information provided Eric Hammer, Registered Physiotherapist/registered psychotherapist is of a general nature and is furnished only for educational/entertainment purposes only. No information is to be taken as medical or other health advice pertaining to any individual specific health or medical condition. You agree that use of this information is at your own risk and Eric Hammer, Registered Physiotherapist/registered psychotherapist harmless from any and all losses, liabilities, injuries or damages resulting from any and all claims.