Table 4.

Outcome Values for the Selected GRF Outcome Measures, Arranged per Team Category ^a

	U13		U15		U17		U19		First and Second
Measure	Mean	SD	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Peak force V	279.94	28.43	270.75	25.13	270.99	27.39	261.28	24.23	267.09	17.86
Peak force AP	37.90	5.29	35.20	4.38	35.02	4.14	35.45	4.91	33.40	3.46
RMS ML 0.4	4.26	0.74	4.48	0.90	4.41	0.77	4.69	0.99	4.22	0.82
Hor GRF dyn	1.79	0.57	1.69	0.45	1.57	0.38	1.59	0.39	1.35	0.22
Hor GRF late dyn	0.92	0.29	0.86	0.17	0.79	0.16	0.81	0.20	0.71	0.09
TTS VRAW 1.5, s	1.30	0.68	1.20	0.56	0.98	0.39	0.95	0.37	0.78	0.20

^aValues are presented as percentage body weight unless noted otherwise. See Outcome Measures section for definitions. GRF, ground-reaction force.