Randomised clinical trial: Combined impact and resistance training in adults with stable Crohn’s disease

Jones, Katherine, Baker, Katherine, Speight, Ally, Thompson, Nicholas and Tew, Garry (2020) Randomised clinical trial: Combined impact and resistance training in adults with stable Crohn’s disease. Alimentary Pharmacology and Therapeutics, 52 (6). pp. 964-975. ISSN 0269-2813

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Abstract

Background
Crohn's disease (CD) is a predisposing factor for bone loss and muscle dysfunction, which could lead to osteoporotic fractures and physical disability, respectively.

Aim
To assess the effect of 6 months of combined impact and resistance training on bone mineral density (BMD) and muscle function in adults with CD.

Methods
In this randomised controlled trial, 47 adults with stable CD were assigned to exercise (n = 23) or control (n = 24) groups and followed up for 6 months. The exercise group received usual care plus a 6‐month combined impact and resistance training programme, involving three, 60‐minute sessions per week and a gradual tapering of supervision to self‐management. The control group received usual care alone. The primary outcomes were BMD (via dual energy X‐ray absorptiometry) and muscle function (measures of upper and lower limb strength and endurance) at 6 months.

Results
At 6 months, BMD values were superior in the exercise group with statistical significance at lumbar spine (adjusted mean difference 0.036 g/cm2, 95% CI 0.024‐0.048; P < 0.001), but not at femoral neck (0.018 g/cm2, 0.001‐0.035; P = 0.059) or greater trochanter (0.013 g/cm2, −0.019 to 0.045; P = 0.415) after correcting for multiple outcomes. The exercise group also had superior values for all muscle function outcomes (P < 0.001; unadjusted mean differences ranging 22.6‒48.2%), and lower fatigue severity (P = 0.005). Three exercise‐related adverse events were recorded: two instances of light‐headedness and one of nausea.

Conclusions
The intervention improved BMD and muscle function in adults with CD and appears as a suitable model of exercise for reducing future risk of osteoporotic fractures and disability.

Trial registration: ISRCTN11470370.

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