Period and carry-over effects and follow-up results There was no statistically significant period effect for
any outcome measure. Furthermore, we could not find any statistically relevant carry-over/treatment by period
interaction. No outcome measure at the end of the second intervention was significantly different from outcome
measures at follow-up 6 months later (ranging from p = 0.14 for LEMS to p = 0.93 for 10MWT at preferred speed, results of follow-up measurements are displayed in Table 2). However, there were outcome measures that were better at
follow-up compared to baseline (two-sided Paired-Samples T Test; p = 0.05 for 10MWT at preferred speed, p = 0.02
for SCIM and p < 0.01 for LEMS).