Physical Activity Clinical Trial
Official title:
Theory-informed Evaluation of Two Delivery Approaches of a GP Exercise Referral Scheme
Physical activity (PA) benefits both physical and psychological health, yet the majority of
UK adults are physically inactive. "Exercise for Health" (EFH) is a General Practitioner
(GP) exercise referral scheme run in Liverpool for people who are inactive with a medical
condition. Patients are referred by their GP practice, where they receive 12 weeks of
subsidised exercise classes at their local leisure or community centre.
In 2012, one of the thirteen EFH centres (Centre A) introduced some changes to try and
improve EFH at their centre. These changes included:
- a pre-scheme meeting with a health trainer, to help the patient decide if EFH is for
them.
- exclusive classes (gym or activities) available daily for EFH participants (compared to
gym only classes two or three times a week in other centres).
This non-randomised study will compare the effectiveness of the adapted EFH (Centre A) with
standard EFH delivery (Centre B). All participants referred to centre A (n=100 approx) or
centre B (n=100 approx) during the study period will be invited to take part. Changes in
self-reported PA, PA self-efficacy and psychological wellbeing will be measured at the end
of EFH (12 weeks) and at 12-month follow-up. A subsample of participants (n=15 from each
centre) will take part in qualitative interviews to explore the factors that contribute to
effectiveness.
A secondary aim is to explore psychological factors contributing to any differences between
the two centres. Self-determination theory suggests that where participants feel they are
offered choice, feel they are competent at exercise, and feel connected to people they
exercise with, they will be more intrinsically motivated and more likely to continue
exercising. Therefore it is hypothesised that participants attending the adapted EFH will be
more motivated and more likely to continue exercising.
This mixed-method observational study will compare the short- and long-term effectiveness of
two different delivery approaches of an exercise referral scheme (Exercise for Health, EFH).
As the intervention is already in widespread use randomisation is not feasible, therefore a
case control design is adopted to compare the effectiveness of an adapted EFH scheme
(delivered at centre A) with the standard EFH scheme (delivered at centre B). Centre B is
selected as the comparison centre due to its similarity to centre A on socio-demographic
markers (e.g. number of EFH referrals, socioeconomic make-up of local population).
Although the adapted scheme has not drawn overtly from Self-determination Theory (SDT), it
is hypothesised that the adapted scheme promotes greater environmental support of SDT-based
psychological needs for participants than the standard EFH scheme. Autonomy is promoted
through the increased choice offered through daily sessions and the involvement of the
patient in their decision whether to take up the scheme, competence is encouraged through
the tailoring of classes to the ability of EFH participants and the opportunity to observe
similar others, and relatedness is supported through the social assimilation of participants
through regular group activities.
It is hypothesised that:
1. Both EFH delivery approaches will have beneficial effects on participants'
self-reported PA, self-efficacy and psychological well-being post-intervention.
2. Participants attending the adapted scheme will perceive greater needs support, greater
psychological needs satisfaction and more autonomous motivation during and
post-intervention; will have higher adherence to EFH; will have higher leisure centre
attendance from post-intervention to 12 months and report higher PA levels at 12
months.
3. Perceived needs support will predict psychological needs satisfaction during the
intervention; psychological needs satisfaction during the intervention will predict
autonomous motivation and psychological well-being post-intervention; post-intervention
autonomous motivation will predict PA at 12 months and leisure centre attendance from
post-intervention to 12 months.
;
Observational Model: Case Control, Time Perspective: Prospective
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