From: Efficacy of pre-operative quadriceps strength training on knee-extensor strength before and shortly following total knee arthroplasty: protocol for a randomized, dose-response trial (The QUADX-1 trial)
Gp. 2
Gp. 4
Gp. 6
All patients
Age (years)
Height (cm)
Weight (kg)
Gender (m/f)
Index knee (r/l)
Kellgren-Lawrence classification (I–IV)