Table 2. Characteristics of the tennis players (n = 161). Characteristic n (%) Mean ± SD or Median(min–max) Age – 22.0 ± 4.1 Male 90 (55.9) – Female 71 (44.1) – Height (m) – 1.74 ± 0.09 Weight (kg) – 68.6 ± 10.4 Previous injury Present 50 (31.1) – Absent 111 (68.9) – Tennis experience (years) – 15 (6–31) Skill level* Singles ranking – 742 (27–2668) Doubles ranking – 595 (13–1886) Match participation Singles 59 (36.6) – Singles + doubles 102 (63.4) – *31 athletes did not have an ITF ranking and were not included in the analysis.