Plain English Summary
Background and study aims
In recent years there have been significant reductions in walking and cycling for transport that has not been replaced by increases in recreational activity, so the population has become more inactive and rates of obesity have increased. Increasing physical activity in the population is most likely to be achieved by reversing the trend of reductions in walking. Walking can easily be undertaken at sufficient intensity for health gain and can be integrated more easily into daily life than more formal exercise. To be beneficial to health, physical activity should be performed at a moderate intensity which for most people is equivalent to walking at a brisk or fast pace (approximately 5.6 to 6.4 km/hour). Although 77% of adults walk for at least 30 minutes once a month, only 32% do so at a self reported brisk/fast pace. It is likely that advice to increase the frequency and intensity (pace) of walking will be more acceptable than advice to take up new, less common activities. Studies have shown that advising people to walk a fixed distance at a brisk pace, leads to moderate intensity walking speeds and improvements in established cardiovascular disease risk factors and fitness. A simple message such as walk a mile at a brisk pace can lead to self-selected walking paces that are of sufficient intensity to produce benefits, but still low enough to be safe. Although volunteers can follow simple walking messages in controlled settings, it is uncertain whether people would adopt and adhere to messages if they were delivered opportunistically (while they are waiting for routine appointments with a GP) by a GP, to inactive people who were not seeking advice. Simple walking messages requiring little or no explanation can be delivered quickly and are therefore suitable for time pressured settings such as general practice. General practitioners (GPs) understand the importance of physical activity and are enthusiastic about giving advice but frequently cite lack of time as the main barrier to doing so. If it was shown that a simple screening system and easy to deliver physical activity message was a cost-effective way to reduce inactivity, then it is likely that adoption by GPs could be achieved. A recent review of pedometer interventions shows that pedometer users significantly increase their physical activity, especially if set a target number of steps per pay. Therefore, we propose to examine the feasibility of conducting a trial comparing usual care, usual care plus simple advice, and usual care plus simple advice and use of a pedometer, to reduce the number of inactive patients.
Who can participate?
Any male or female aged 40-74 years who can walk for 5 minutes continuously without undue fatigue or discomfort and who is registered with one of the participating practices.
What does the study involve?
Twenty four general practices (8 each in Devon, Bristol and Coventry) will be recruited. Half of the practices will recruit patients opportunistically (while they are waiting for routine appointments with a GP) and half will recruit patients by written invitation if they are registered at the practice and in the age group 40-74 years.
All consenting participants will be randomly allocated to one of three treatment groups.
Two methods of allocation will be tested: i) randomisation at the level of the practice (all patients from the same practice will be randomised to the same arm of one of the three arms of the study) and ii) randomisation of individual patients within practices (patients within the same practice will be randomised to one of the three study arms).
Participants allocated to the control arm (Arm A) will be given: (i)written information on physical activity and its benefits;(ii) a pedometer (which will be sealed so that participants cannot view the readings during the intervention) and written information on how to use it.
(Arm B), participants will receive the same items and information as for Arm A but will also be advised by their GP to walk at least a mile per day (1520 minutes) at a brisk to fast pace, each day of the week.
(Arm C) , participants will receive the same items, written physical activity information and verbal advice as in Arm B. However, for arm C, the pedometer will unsealed (allowing them the view the readings showing the number of steps taken) and participants will be given written information about how to use it. All patients will complete a questionnaire at baseline and 12 weeks post randomisation.
Where is the study run from?
The study is coordinated from the University of Exeter but also involves Bristol and Warwick University.
When is the study starting and how long is it expected to run for?
The study will ran from June 2010 to September 2011
Who is funding the study?
The National Prevention Research Initiative managed by the Medical Research Council
Who is the main contact?
Associate Professor Melvyn Hillsdon
The feasibility of a simple, low cost, general practitioner delivered intervention to promote physical activity
Is a randomised controlled trial of a simple, lowcost, general practitioner delivered intervention to promote physical activity feasible?
REC reference number 10/H0203/18 approval given by the South West 1 Research Ethics Committee on 20th April 2010
Randomised controlled study
Primary study design
Secondary study design
Randomised controlled trial
Quality of life
Patient information sheet
Not available in web format, please use the contact details below to request a patient information sheet
Two interventions delivered at the level of general practice were compared to usual care. All patients invited to take part in the study were informed that their GP was participating in a study assessing the effect of physical activity information on physical activity behaviour.
Arm A (Usual care control). Following written informed consent, patients were given the written physical activity information and instructions on how to wear a sealed pedometer. Written information included the benefits of physical activity and how to use the pedometer. Patients were also given an envelope containing a baseline questionnaire, pre-paid return envelope, a summary of the study and patient information.
Arm B (Brief GP advice). In addition to receiving the written physical activity information in Arm A, patients were advised by their GP to walk at least a mile per day (15-20 minutes) at a brisk to fast pace, each day of the week. Patients in Arm B also received the study envelope described above including sealed pedometer.
Arm C (Brief GP advice + pedometer). Following the GP walking advice, patients were given an unsealed pedometer and written information about how to use it. They were specifically guided to work towards 10,000 steps per day (approximately equivalent to 150 minutes per week). The written information provided details of how to work towards 10,000 steps and set intermediary goals based on published guidelines. All patients were sent a repeat of the baseline questionnaire at 3 months, along with a pre-paid envelope for return. Patients were also requested to wear their pedometers for 7 consecutive days and then return them in a provided pre-paid envelope so that the data could be extracted. After data extraction, pedometers were returned to patients for them to keep as an incentive for participation.
All patients will complete a questionnaire at baseline and 12 weeks post randomisation.
Primary outcome measure
1. An estimate of the intervention effect size and where appropriate an ICC.
2. The average number of steps per day recorded by a pedometer, measured for 7-days at baseline and 12-weeks post randomization.
Secondary outcome measures
1. Estimates of practice and patient recruitment rates and estimates of loss to follow up
2. Estimates of costs of the delivery of the intervention and the data collection methods
3. Assessment of GP and patient acceptability to undertake a trial
4. Estimates of the reduction in physical inactivity
5. Physical activity commitment measured on a 3-item self rating scale with responses ranging from 010 (15) measured at baseline and 12 weeks
5. Health-related quality of life using the EQ-5D measured at baseline and 12 weeks.
Overall trial start date
Overall trial end date
Reason abandoned (if study stopped)
Participant inclusion criteria
Aged 40-74 and able to walk unassisted, continuously for 5 minutes, without undue fatigue or discomfort.
Eligibility for randomisation further includes categorization as physically inactive based on the General Practice Physical ActivityQuestionnaire (GPPAQ). The age range represents the maximum age for validity of the GPPAQ and the age range for the government's vascular checks programme that is linked in with the Physical Activity Care Pathway.
Target number of participants
Participant exclusion criteria
1. Registered disabled or unable to walk for continuously for 5 minutes, unassisted, without undue fatigue or discomfort.
2. Already participating in a study at the practice.
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
Sport and Health Science
University of Exeter (UK)
c/o Helen Loughlin
Head of Research Policy
Research and Knowledge Transfer
Medical Research Council (UK) - National Prevention Research Initiative G0802118/1
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Not provided at time of registration
Intention to publish date
Participant level data
Not provided at time of registration
Basic results (scientific)
2014 results in: http://www.ncbi.nlm.nih.gov/pubmed/24746263
Warren FC, Stych K, Thorogood M, Sharp DJ, Murphy M, Turner KM, Holt TA, Searle A, Bryant S, Huxley C, Taylor RS, Campbell JL, Hillsdon M, Evaluation of different recruitment and randomisation methods in a trial of general practitioner-led interventions to increase physical activity: a randomised controlled feasibility study with factorial design., Trials, 2014, 15, 134, doi: 10.1186/1745-6215-15-134.