| Non-exercise | Volleyball | Football | P-value b | Effect size | Power |
---|---|---|---|---|---|---|
(n = 25) | (n = 40) | (n = 27) | ||||
25-OHD (ng/mL) | 14.9 | 15 | 19.4** | < 0.01 | 0.15 | 0.95 |
(12.7–17.0) a | (13.3–16.7) | (17.7–21.1) | ||||
Bone density of lumbar spine (g/cm²) | 1.024 | 1.151* | 1.104 | < 0.01 | 0.16 | 0.96 |
(0.970–1.077) | (1.113–1.189) | (1.056–1.152) | ||||
Bone density of femoral neck (g/cm²) | 0.708 | 0.824* | 0.833* | < 0.01 | 0.23 | 0.99 |
(0.664–0.751) | (0.791–0.858) | (0.797–0.870) | ||||
Bone density of Lumbar spine (Z score) | 0.140 | 1.108* | 0.811* | < 0.01 | 0.16 | 0.97 |
(-0.253–0.533) | (0.823–1.392) | (0.450–1.172) | ||||
Bone density of femoral neck (Z score) | -0.352 | 0.777* | 0.948* | < 0.01 | 0.24 | 0.99 |
(− 0.764–0.060) | (0.451–1.104) | (0.582–1.314) |