Table 1:

Contents and components of PRESTO-Play and PRESTO-Fit

Contents	Action components	Methods
PRESTO-Play
Health behaviour change principles: incorporated throughout all classes		Eleven classes of 1.5-h duration
Awareness	Increase knowledge about importance of posture while playing Provide cues to action, increase risk perception	Standardized PowerPoint presentation Semi-structured class discussions, peer model stories Video of role model with physical complaints
Motivation	Attitudes to attention to body posture while playing Social influences (norms, modelling, pressure) Self-efficacy	Semi-structured class discussions Exploring assumptions Individualized feedback from therapist on body posture Analysing own body posture with mirror
Ability	Implementation of paying attention to body posture while playing	Goal setting Personal feedback Semi-structured class discussions Exploring barriers and facilitators
Body posture while playing: practice with instrument incorporated from class 2 until 11
	Anatomy and physiology of the human body in relation to playing a musical instrument Basic body posture Postural regulation Playing vs. postural muscles Thoracic and abdominal muscles Breathing Dynamic balance Hypermobility Warming-up and cooling-down Stretching Relaxation Influence of stress on your body Instrument-specific biomechanics Ergonomics	Workshop Individual feedback on performance posture from therapist Visualizing own body posture by use of mirrors Analysing each other’s body postures Book: ‘Making music without pain’ Homework assignments
Psychosocial aspects: from class 7, half of the class was dedicated to playing the instrument, half to psychosocial aspects
Psychosocial aspects	Practice behaviour Physical activity Coping with stress Music performance anxiety Acute vs. chronic pain Where to get help	Workshop Semi-structured class discussions on real-life situations
PRESTO-Fit
Health behaviour change principles to increase physical activity up to 10 000 steps		Five classes of 1.5-h duration
Awareness	Increase knowledge about importance of physical activity for a musician	Video on general physical activity Video on musician-specific benefits of physical activity Assignment on calories and physical activity
Motivation	Peer model stories	Semi-structured class discussion Visualizing current steps with graphs
Ability	Implementation of physical activity	Goal setting Keeping step logbooks Visualizing step counts with graphs Semi-structured class discussion Count steps of frequent routes Introduction of mobile telephone apps