Three studies were included (n=198 patients).
PEDro scores ranged from five to seven out of 10. Limitations included lack of blinded outcome assessment (two studies), lack of intention-to-treat analysis (two studies) and follow-up data for less than 85% of patients (two studies).
Two of the three studies showed that post-intervention benefits were maintained at follow-up.
One study, with a six-month initial training programme, reported that the significant post-intervention increase in quadriceps strength, in the strength training group compared with usual care, was maintained at 12-month follow-up. One study with a 12-week initial training programme reported that the significant benefits in strength post-intervention, compared with baseline, were maintained at 12-week follow-up (p<0.05) in all intervention groups (strength training, endurance, and both).
One study with a 12-week initial training programme reported that none of the post-intervention benefits, in the strength training group compared with usual baseline activity, were maintained at 12-week follow-up.