TABLE 1.

Demographic and clinical characteristics of the patients.

Patient demographics
Male sex	21 (100%)
Current BMI (kg/m2)	25.8 ± 6.0
Age at baseline (years)	40 (18–66)
Age at symptom onset (years)	13 (4–50)
Disease duration (years)	25 (1–59)
Ambulatory	21 (100%)
Use of walking aids	7 (33.3%)
Baseline 6MWD
<300 m	5 (23.8%)
300–400 m	3 (14.3%)
400–500 m	6 (28.6%)
>500 m	7 (33.3%)
Calf hypertrophy	17 (81.0%)

Note: Data are shown as n (%), median (range) or as mean ± standard deviation.

Abbreviations: 6MWD, 6‐min walking distance; BMI, body mass index.