Link: http://js.sagamorepub.com/palaestra/article/view/7556

Reference: PRZYSUCHA, E., ZERPA, C., & CZOLPINSKI, M. (2016). THE EFFECTS OF ONE BOUT OF NORDIC WALKING ON EXERCISE CAPACITY AND INTENSITY, RATE OF PERCEIVED EXERTION, AND PAIN IN OLDER ADULTS WITH OSTEOARTHRITIS IN THE LOWER EXTREMITIES. Palaestra, 30(2).

Link: http://informahealthcare.com/doi/abs/10.3109/09638288.2014.972591

Reference:
O’Donovan, R., & Kennedy, N. (2014). “Four legs instead of two”-perspectives on a Nordic walking-based walking programme among people with arthritis. Disability & Rehabilitation, (0), 1-8