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. 2019 Feb 4;12:10. doi: 10.1186/s13047-019-0318-1

Table 1.

Dance history characteristics of university-level ballet dancers (N = 18)

Characteristic Mean ± SD Range
Age started dancing (yrs.) 6.2 ± 3.4 2–13
Years of ballet training (yrs.) 12.6 ± 3.6 5–17
Ballet training (hr/wk.) 19.5 ± 8.8 1.5–35
Dancing barefoot (hr/wk.) 12.1 ± 8.1 4–30
Rehearsals (hr/wk.) 8.2 ± 4.7 0–18
Technique (hr/wk.) 12.7 ± 5.8 4–27.5
Stretching (hr/wk.) 3.6 ± 2.1 0–8