You have to be able to move freely without your shoulder getting in the way'

Peabody Institute of Music viola professor Victoria Chiang helps a student with shifting exercises during a National Philharmonic Masterclass in 2013.

The Strad's May 2016 issue, out now, features a guide to left- and right-hand shifting by Birmingham Conservatoire viola professor Louise Lansdown – download on desktop computer or through The Strad App.