Link: http://onlinelibrary.wiley.com/doi/10.1111/sms.12694/abstract?userIsAuthenticated=false&deniedAccessCustomisedMessage

Reference:
Bieler, T., Siersma, V., Magnusson, S. P., Kjaer, M., Christensen, H. E., & Beyer, N. (2016). In hip osteoarthritis, Nordic Walking is superior to strength training and home‐based exercise for improving function. Scandinavian Journal of Medicine & Science in Sports.