Table 2.

Results of cross-correlation analysis of the rotational movement between the lumbar spine and hip joints

	Total swing	Backswing	Downswing
Lumbar spine and leading hip joint
Max. correlation coefficient	0.83 ± 0.09	0.89 ± 0.16*	0.65 ± 0.13
Time lag at each peak value (s)	0.25 ± 0.12§,£	–	–
Lumbar spine and trailing hip joint
Max. correlation coefficient	0.79 ± 0.10	0.88 ± 0.19	0.82 ± 0.18
Time lag at each peak value (s)	0.11 ± 0.13§	–	–

* p < 0.01 versus downswing, ^§p < 0.01 versus zero time lag, ^£ p < 0.01 versus lumbar spine and trailing hip joint.