Table 2.

Summary data (Mean (SD)) of muscle activity, force fluctuation, and cardiovascular responses over time across the control and cognitive fatigue conditions

		Control					Cognitive fatigue
		Initial	2nd	3rd	4th	Exhaustion	Initial	2nd	3rd	4th	Exhaustion
EMG RMS of FCR (% MVC)*	Mean	23.99	23.35	24.73	27.21	30.12	19.09	19.79	18.72	21.39	21.25
	SD	9.74	13.24	12.26	12.04	11.22	9.34	10.93	12.47	11.20	12.28
EMG RMS of ECR (% MVC)	Mean	41.33	42.82	40.82	44.34	44.50	33.56	32.11	30.51	33.51	34.44
	SD	15.45	18.23	16.63	18.62	18.40	11.60	11.58	12.95	13.77	13.36
EMG mPF of FCR	Mean	130.33	130.51	130.31	128.46	126.24	125.80	133.54	130.85	130.58	129.87
	SD	16.72	19.55	19.46	13.18	24.69	34.72	26.85	26.36	26.14	26.50
EMG mPF of ECR	Mean	178.86	177.62	178.03	177.52	178.18	177.84	176.18	178.51	179.26	179.10
	SD	11.94	11.36	9.00	9.79	10.95	11.27	11.89	8.94	10.53	11.70
Force fluctuations (%)*	Mean	4.63	3.59	3.41	4.37	4.58	4.20	3.95	3.01	3.35	5.69
	SD	2.30	1.39	1.52	2.38	2.66	2.37	2.82	0.96	1.23	4.21
HR (bpm)	Mean	84.49	84.02	82.72	91.45	83.26	83.56	82.72	85.98	84.45	84.19
	SD	25.21	20.00	16.42	19.31	14.80	22.93	18.75	28.02	27.35	21.95
HRV LF/HF	Mean	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42	0.42
	SD	0.003	0.002	0.002	0.006	0.002	0.002	0.005	0.006	0.003	0.003

*denotes a main effect (p < 0.05) of time