The ability to play rhythmically while playing technical units, such as hook stroke, is very important.
Inserting practice breaks during which you feel a pulse is an excellent practice technique.
You can use a metronome, or your body (eg. foot-taps), to enunciate the beat.
Making a silly noise keeps the pulse steady. It could also help to release any tension in the jaw.
For instance you could practise the opening of Viotti's Violin Concerto No.23 with a practice break between each 2-note unit.
SEE
Resources - Repertoire
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