Table 2

The percentage rate of HSI based on relative running exposure variables and arbitrary cut-points, using data from 220 elite Australian footballers

Running exposure variable and associated cut-point	Number of data points < the cut-point	% of HSI < the cut-point	Number of data points ≥ the cut-point	% of HSI ≥ the cut-point
Acute:chronic workload for distance covered
Above 10 km/hour
0.50	483	0.41	4786	0.46
0.75	1064	0.38	4205	0.48
1.00	2384	0.42	2885	0.49
1.25	3763	0.43	1506	0.53
1.50	4530	0.42	739	0.68
1.75	4878	0.43	391	0.77
2.00	5004	0.46	265	0.38
Above 24 km/hour
0.50	877	0.23	4345	0.51
0.75	1639	0.49	3583	0.45
1.00	2596	0.39	2626	0.53
1.25	3531	0.42	1691	0.53
1.50	4182	0.45	1040	0.48
1.75	4539	0.46	683	0.44
2.00	4763	0.48	459	0.22
Relative week-to-week change in distance covered
Above 10 km/hour
0.50	664	0.45	4932	0.45
0.75	1472	0.27	4124	0.51
1.00	2715	0.33	2881	0.56
1.25	3771	0.29	1825	0.77
1.50	4315	0.35	1281	0.78
1.75	4659	0.39	937	0.75
2.00	4879	0.37	717	0.98
Above 24 km/hour
0.50	1182	0.17	4223	0.54
0.75	1986	0.30	3419	0.56
1.00	2766	0.36	2639	0.57
1.25	3383	0.33	2022	0.69
1.50	3793	0.32	1612	0.81
1.75	4087	0.32	1318	0.91
2.00	4310	0.30	1095	1.10
Distance covered above 24 km/hour as a percentage of distance covered above 10 km/hour
2.5%	2194	0.09	4327	0.58
5%	4914	0.33	1607	0.68
7.5%	6013	0.42	508	0.39
10%	6366	0.42	155	0.00

Acute:chronic workload ratio is the ratio of distance covered in a week (acute workload) compared with the weekly average of the same variable over the preceding 4-week period (chronic workload). Note that the 4-week period over which the chronic workload is calculated is inclusive of the acute workload week. Relative week-to-week change in distance is the ratio of distance covered in a week compared with the previous week. A value >1 indicates an increase from one week to the next, whereas a value <1 indicates a decrease from one week to the next.
HSI, hamstring strain injury.