Comparison between Clegg Impact Soil Tester and hoof impact shock measurements on 13 surfaces used for training trotters or sport horses

Figures & data

Table 1. Vertical deceleration peak at hoof’s impact and Clegg impacts’ measurements in 13 equestrian surfaces.

Sites		Surfaces for spot horses					Surfaces for trotters
		Arena 1 (sand & fibre mix)		Arena 2 (micro-sand & fibre mix)			Trainer A’s tracks		Training center tracks 1-2		Training center tracks 3-4		Trainer B’s tracks
Surfaces		Harrowed	Rolled	20cm	13cm	7cm	Sand & fibre mix	Sand on an artificial turf base	Sand on a clinker base	Bridle path	Sand on waxed sand & fibre mix underlayer	Sand (25 cm thickness)	Sand on a soft base	Stabilized sand on a hard base
Number of sessions		3	3	3	3	3	1	1	1	1	1	1	4	4
Vertical deceleration peak [m/s^2]	Mean	317	441	616	802	929	1997	2629	2061	2915	3370	3319	1895	5446
	Mean inter-strides SD	96	167	290	401	467	838	1312	577	1549	1308	1481	776	2504
Clegg Impact Soil Tester [g]	Impact 1	39	52	60	83	91	130	168	135	272	193	186	81	369
	Impact 2	64	73	83	112	138	174	260	237	304	290	292	118	450
	Impact 3	81	84	95	125	161	189	294	319	345	336	352	142	484
	Impact 4	88	89	101	137	174	198	316	355	397	350	394	159	522
	Impact 5	100	96	108	142	189	204	330	363	408	377	431	170	520
	Mean 5 impacts	75	79	89	120	151	179	273	282	345	309	331	134	469
	Mean inter-tests SD	7	5	15	8	12	28	64	95	75	75	97	17	28

Figure 1. Correlation between the first 3 impacts, and the mean of the 5 impacts, measured with the Clegg impact soil tester, and the vertical deceleration peak measured on horses’ hooves under training conditions, for the 13 surfaces tested.