Methodological Differences in the Interpretation of Fatigue Data from Repeated Maximal Effort Knee Extensions

Table 1: Percent decline in torque output beginning from the repetitions with the highest torque outputs*.

Description	Torque	FI Mean	FI SD
50 reps F3	TI_F	49.19	12.12
	PT	50.66	11.61
	T135	53.48	12.7
	TI_M	54.13	12.57
	TI_L	56.51	10.95
30 reps F3	PT	30.57	11.61
	Ti_F	30.96	13.07
	T135	31.66	14.6
	TI_M	32.84	13.95
	TI_L	34.97	13.6
50 reps F5	Ti_F	50.68	10.34
	PT	52.16	9.81
	T135	55.56	10.58
	TI_M	55.87	10.47
	TI_L	58.2	9.19
30 reps F5	Ti_F	31.77	10.83
	PT	31.85	9.01
	T135	32.56	13.43
	TI_M	33.45	12.34
	TI_L	35.91	11.09

Decrements in torque output quantified as Fatigue Index (FI), percent decrease. For each repetition range, 1-50 and 1-30, four different combinations of initial torque and final torque were calculated by using the average of the torque values from the first three and last three repetitions (F3), the first five and last five repetitions (F5). Each of the four Fatigue Indexes was calculated using the five different torque variables (PT, T135, TI_F, TI_M, and TI_L).