Hi, Good Morning

Relation between the foot pressure as a risk factor in causing knee and back pain and Strain:

Causing Knee pain by so many factors like Age, BMI, Occupation, Life style and etc.

Individuals who engage in long periods of standing and walking are at risk for injury. But, this alone cannot explain why some individuals suffer injuries and others do not. The type of job and the flooring can be potential risk factors. For example, jobs that do not allow the individual to switch among several positions may have higher risks. 

a.  The special type of shoes (MCR) worn is also a consideration. Poorly fitted shoes and work boots may aggravate calluses and ingrown toe nails. They may also accentuate a structural abnormality of the foot. 

b.  Overweight and Obesity is another potential risk because it affects the forces exerted on the spine and lower extremity joints during both walking and standing. 

c.  Previous injury to a specific area that never really recovers may also be a risk for chronic workplace injury. 

d.  Perhaps the greatest risk is structural abnormality of the foot and lower extremity, such as a flat foot, excessive pronation or supination

For further information kindly see the following links:

http://www.nemsi.uchc.edu/clinical_services/spine/back/index.html

http://umm.edu/health/medical/reports/articles/back-pain-and-sciatica

http://www.nytimes.com/health/guides/symptoms/back-pain-low/print.html

http://www.healthline.com/symptom/low-back-pain

http://www.orthop.washington.edu/?q=patient-care/articles/arthritis/back-pain.html

https://mywiserhealth.com/motion/bulging-herniated-disk/learn/

Check articles on Knee Adduction Moment.

Its a prime reason of pain in knee which can be reduced or increased based on footwear parameters like, material, lateral wedge, medial arch, heal raise. etc

If you need any help feel free to message me.

Wish you luck for your project.

Regards Parth.

Thanking you for the answers, I am looking for the evidence based support for the foot pressure pattern and the link to Knee and back conditions. Hope this makes a better sense