Pacing

In Australia, and many other countries, junior riders are restricted in the gearing they are allowed to use. In Australia at the time of writing, for under 15's the maximum allowed gearing is 6m rollout, which is about a 76" gear. It's tiny. This has profound effects on flying 200's.

Here's some data from the 2013-2014 Australian Junior Track Titles at the Dunc Grey velodrome in Sydney (venue for Sydney 2000 Olympic Games) under 15's flying 200's to make a point.

JM15

Electronic	Speed	Entry	Speed entry	0-100	Speed 0-100	100-200	Speed 100-200
200	200

12.025	59.875	2.976	60.488	5.921	60.805	6.105	58.973
12.084	59.581	2.959	60.825	5.976	60.240	6.108	58.936
12.292	58.576	3.087	58.313	6.090	59.117	6.202	58.044
12.292	58.573	3.109	57.902	6.084	59.176	6.209	57.981
12.450	57.831	3.018	59.646	6.143	58.601	6.307	57.080
12.619	57.056	3.150	57.143	6.208	57.986	6.411	56.156
12.739	56.520	3.236	55.628	6.322	56.942	6.417	56.104
12.866	55.962	3.135	57.413	6.363	56.580	6.503	55.358
12.902	55.807	3.112	57.850	6.349	56.698	6.552	54.943
12.948	55.609	3.320	54.219	6.426	56.025	6.522	55.199
13.006	55.359	3.184	56.527	6.361	56.598	6.645	54.174
13.116	54.893	3.153	57.098	6.434	55.953	6.682	53.873
13.138	54.804	3.252	55.351	6.484	55.520	6.654	54.106
13.145	54.773	3.113	57.815	6.448	55.828	6.697	53.757
13.225	54.444	3.359	53.595	6.546	54.997	6.679	53.901
13.312	54.085	3.443	52.275	6.606	54.498	6.707	53.678
13.556	53.115	3.339	53.912	6.666	54.005	6.890	52.253
13.622	52.857	3.448	52.210	6.707	53.678	6.915	52.060
13.693	52.583	3.332	54.028	6.721	53.564	6.972	51.637
13.831	52.057	3.268	55.086	6.803	52.921	7.029	51.220
13.901	51.794	3.371	53.397	6.840	52.631	7.061	50.984
13.956	51.591	3.512	51.260	6.879	52.330	7.076	50.873

JW15

Electronic	Speed	Entry	Speed entry	0-100	Speed 0-100	100-200	Speed 100-200
200	200

12.918	55.736	3.143	57.266	6.349	56.698	6.569	54.806
13.007	55.357	3.147	57.205	6.360	56.601	6.646	54.166
13.176	54.645	3.279	54.896	6.485	55.514	6.691	53.803
13.566	53.076	3.409	52.809	6.667	53.998	6.899	52.185
13.784	52.235	3.535	50.919	6.868	52.416	6.916	52.055
14.072	51.167	3.409	52.801	6.923	52.004	7.149	50.356
14.290	50.383	3.588	50.170	7.081	50.840	7.209	49.935
14.322	50.274	3.503	51.392	7.031	51.203	7.291	49.378
14.725	48.896	3.494	51.518	7.202	49.988	7.523	47.851
14.880	48.387	3.788	47.516	7.295	49.348	7.585	47.463
14.939	48.195	3.737	48.167	7.369	48.851	7.570	47.557
15.545	46.316	3.606	49.915	7.619	47.253	7.927	45.416
15.674	45.936	3.816	47.165	7.700	46.753	7.974	45.147

The data tells us a lot about the pacing of these efforts. In particular, pay attention to the "entry" speed, which is the 50 metres preceeding the flying 200 start line, then compare that to the speed for the first 100 metres. If the entry speed is greater than the first 100, a pacing error has taken place. The rider was fastest during part of the event that counts for nothing. A flying 200's on a 6m rollout is 38 revolutions, start too early and the rider runs out of revs. The line ridden and the jump point for a J15 is quite different to that used by a rider on a larger gear. The same applies to under 13's and under 11's if they get onto a banked velodrome. A considerable number of the juniors who the data above was taken from paced their flying 200's poorly and could have recorded better times had they jumped later and been slower during their wind ups. Many of them recorded their fastest splits for the entry 50. Coaches of these athletes need to take note of this data and work on the lines ridden and pacing used by these junior sprinters.

The data displayed above is from this spreadsheet.