Feasibility of REHIT in NDH Patients
|ClinicalTrials.gov Identifier: NCT04011397|
Recruitment Status : Completed
First Posted : July 8, 2019
Last Update Posted : July 9, 2019
|Condition or disease||Intervention/treatment||Phase|
|Diabetes Physical Activity||Other: Exercise intervention Behavioral: Usual care||Not Applicable|
Background Physical activity and exercise interventions to improve health frequently bring about intended effects under ideal circumstances but fail to demonstrate effectiveness when translated to demonstrable benefits in real-world contexts. The aim of this feasibility study was to describe and report data relevant to the acceptability of an exercise intervention (reduced-exertion, high-intensity interval training) in non-diabetic hyperglycaemia (NDH) patients delivered in a National Health Service (NHS) setting.
Individuals with NDH are an intermediary group of patients whose blood glucose levels are higher than normal but not high enough to be diagnosed as diabetic. Such hyperglycaemic blood glucose excursions in 'pre-diabetic' states contribute to the development of macro- and micro-vascular disease risk and increases the risk of developing overt type 2 diabetes. Interventions - such as increased physical activity - for individuals who are diagnostically considered to have NDH are high priority, as they provide a substantial opportunity for preventing future burden of diabetes on patients, the NHS, and the economy.
Evidence supporting the efficacy of exercise and physical activity as preventative or therapeutic treatments for a range of chronic diseases, including obesity and diabetes, is incontrovertible. However, exercise adherence is considered a significant issue. The most commonly cited barrier to undertaking physical activity is perceived 'lack of time'. Consequently, there has been a recent interest in high-intensity interval training (HIT) which is characterised by brief periods of repeated very high-intensity exercise interspersed with longer periods of recovery. More recently attempts have been made to modify HIT to make it more time-efficient and tolerable. This approach is known as reduced-exertion, high-intensity interval training (REHIT). In this study, issues of acceptability and feasibility were considered when implementing a REHIT intervention into usual care within an NHS setting.
Methods The purpose was to assess whether it would be appropriate to progress to a larger-scale pragmatic trial, and to optimise the design and conduct of any such trial. The intention was to recruit 40 participants from a single centre (specialist diabesity centre). Patients were eligible to take part if they were diagnostically defined as non-diabetic hyperglycaemic based on a glycated haemoglobin value of 42-46 mmol·mol. Methodological issues were used to analyse problems that arose.
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||6 participants|
|Intervention Model:||Single Group Assignment|
|Intervention Model Description:||Feasibility study|
|Masking:||None (Open Label)|
|Official Title:||Feasibility of Procedures for a Pragmatic Randomized Controlled Trial of Reduced Exertion, High-intensity Interval Training (REHIT) With Non-diabetic Hyperglycaemia Patients|
|Actual Study Start Date :||March 2016|
|Actual Primary Completion Date :||January 2017|
|Actual Study Completion Date :||January 2017|
Experimental: Intervention group
Exercise intervention (reduced-exertion, high-intensity interval training) alongside normal treatment. [low recruitment prohibited control arm]
Other: Exercise intervention
Exercise intervention (reduced-exertion, high-intensity interval training) delivered within an NHS setting. Consisted 10 min of cycle ergometry (inclusive of warm-up and cool down) including very brief maximal cycle sprints.
Behavioral: Usual care
Members of a multi-disciplinary team including a consultant, diabetes specialist nurse, clinical psychologist, physiotherapist, and dietician worked together to promote patient self-management. Care was tailored to the specific circumstances of each patient after initial assessment and focussed on weight management, dietary education, behavioural therapy, and supported pharmacotherapy initiation as appropriate.
- Number of patients screened and considered eligible to take part in the study [ Time Frame: 4-weeks ]Defined as the number of patients who had contact with the recruitment team and who were assessed for eligibility using inclusion and exclusion criteria.
- Reporting of adverse events [ Time Frame: From first exposure to intervention to last (approx. 6-weeks) ]An adverse event was defined as any untoward occurrence that happened during the conduct of the study.
- Intervention adherence [ Time Frame: From first exposure to intervention to last (approx. 6-weeks) ]Intervention adherence was calculated by summing the total number of participants and the target number of REHIT sessions (15 per participant) and comparing this against the actual completed sessions.
- Change in affective valence (pleasure-displeasure) [ Time Frame: Change from first exposure to intervention to last (approx. 6 weeks) ]Pre-validated 'Feeling Scale' questionnaire which measure pleasure/displeasure responses during exercise. This is a single-item, 11-point, bipolar scale and ranges from - 5 'very bad' to + 5 'very good', with anchors designated for 0 (neutral) and all odd integers in-between. Lower scores are considered to be a worse outcome.
- Change in perceived exertion [ Time Frame: Change from first exposure to intervention to last (approx. 6 weeks) ]Pre-validated 'Rating of Perceived Exertion' questionnaire which measures perceived effort during exercise. This is a 15-point scale and ranges from 6 'no exertion' to 20 'maximal exertion' with anchors designated for all the odd integers in-between. A higher score is considered a worse outcome.
- Change in enjoyment [ Time Frame: Change from first exposure to intervention to last (approx. 6 weeks) ]Pre-validated 'Exercise Enjoyment Scale' (ESS) which measures enjoyment associated with exercise. This is a single-item, 7-point scale. Anchors are given at every integer, ranging from 1 'not at all' to 7 'extremely'. A lower score is a worse outcome.
- Change in peak oxygen uptake (fitness test) [ Time Frame: Change from baseline peak oxygen uptake at approx. 6-weeks ]Progressive cycle test to measure cardiovascular fitness (using gas analysis)
- Change in HBA1c (blood test) [ Time Frame: Change from baseline HbA1c at approx. 6-weeks ]Widely used measure of blood glucose control
- Change in body composition [ Time Frame: Change from baseline body composition at approx. 6-weeks ]Fat mass and fat-free mass estimated via bioelectrical impedance analysis
- Change in systolic and diastolic blood pressure [ Time Frame: Change from baseline systolic and diastolic blood pressure at approx. 6-weeks ]Measured via automated digital blood pressure monitor
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04011397
|Principal Investigator:||Matthew Haines||University of Huddersfield|