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. Author manuscript; available in PMC: 2019 Nov 1.
Published in final edited form as: Muscle Nerve. 2018 Jul 24;58(5):631–638. doi: 10.1002/mus.26161

Figure 5. Number of subjects who are still able to perform each functional test by age.

Figure 5

At 9 years old, more than 80 % of boys could still perform all functional tests. At 12 years of age, more than 80% subjects could perform functional tests except the supine to stand, which only about 40% could perform. By 14 years old, about half of the boys were unable to perform any of the functional tests.