Table 1 . The descriptive statistics of the EMG variables for both the EO and EC conditions .

Item		Muscle		Condition	Asymptomatic (Mean±SD)	LBP (Mean±SD)	p
Onset Latency(ms)		TrA/IO		EO	20±60	55±219	0.087
				EC	86±46	88±52	0.799
		EOA		EO	36±77	36±118	0.995
				EC	111±75	69±39	0.082
		ES		EO	-9±100	-36±334	0.828
Peak Latency (ms) IEMG		TrA/IO EOA ES TrA/IO EOA ES		EC EO EC EO EC EO EC EO EC EO EC EO EC	56±41 102±44 118±45 99±56 128±63 92±45 114±52 0.95±0.28 1.07±0.39 1.01±0.34 1.13±0.45 1.37±0.33 1.46±0.57	59±32 88±61 115±45 75±46 104±54 61±39 115±35 0.78±0.22 0.86±0.30 0.93±0.32 0.98±0.33 1.18±0.24 1.16±0.24	0.311 0.416 0.819 0.170 0.210 0.026 0.944 0.044 0.068 0.453 0.082 0.045 0.038

TrA/IO: TransversusAbdominus/ Internal Oblique, EOA: External Oblique, ES: Erector Spinae

EO: eye open, EC: eye closed

Significant P values are underlined.