Table 4. R2* values of paraspinal muscles in the resting state and in different recovery sessions after exercise (Hz).

Spinal level	Session	Iliocostalis	Longissimus	Multifidus
L3	Resting state	101.14±23.13	97.97±20.46	96.99±21.25
	Recovery I	93.26±21.72*	88.07±19.75*	88.39±19.35*
	Recovery II	127.74±27.90*	115.49±24.84*	121.18±26.3*
	Recovery III	125.80±22.53*	118.27±18.13*	120.99±14.65*
	Recovery IV	123.80±21.53*	117.29±16.30*	118.60±14.03*
	F	13.933	18.166	18.191
	P value	<0.001	<0.001	<0.001
L4	Resting state	92.98±14.62	91.79±13.66*	94.64±15.02
	Recovery I	83.76±16.09*	79.04±15.14*	80.17±17.15*
	Recovery II	105.35±18.20*	100.71±15.67*	103.68±18.47*
	Recovery III	102.88±12.00*	100.36±10.64*	102.57±7.49*
	Recovery IV	101.88±13.00*	101.36±12.64*	104.55±10.62*
	F	18.691	16.485	21.475
	P value	<0.001	<0.001	<0.001

All values are mean ± standard deviation. *Compared with resting state, P<0.05.