Table 2. Mean (±Standard deviation) for hips and shoulder angular rotation values during one-(1BH) and two-handed (2BH) backhand strokes from the initiation of forward swing to ball contact (acceleration phase). Authors Sample Stroke direction Shoulders rotation (°) Hips rotation (°) 1 BH 2 BH 1 BH 2 BH Stepien et al. (2011) 9 male experienced coaches DL 30.1 (10.6) 71.1 (13.8)## 19.0 (6.9) 47.4 (10.3)## Akutagawa & Kojima (2005) 14 male Colleg Players DL NR 31.4 (8.3) 54.4 (9.0)# Fanchiang et al. (2013) 5 male Colleg Players DL 51.0 (16.0) 85.0 (12.0)# 26.0 (22.0) 59.0 (12.0)# Fanchiang et al. (2013) 5 female Colleg Players DL 59.0 (27.0) 85.0 (13.0)# 33.0 (24.0) 43.0 (14.0)# Reid & Elliott (2002) 18 male Colleg Players CC ≈ 51.4* ≈ 65.3 * ≈ 35.9 * ≈ 36.1* DL ≈ 50.3 * ≈ 64 * ≈ 30.1* ≈ 36.6* Colleg = collegiate; CC = cross-court; DL= down the line (laboratory condition); NR=not reported. * = values from average differences between data noted at the end of the backswing and at impact.