Hi there, well that is a tough question to give a short answer to as some players need more and others less and most of my ideas on this have been developed over 15 years, so I look for breaks in running technique, some players I will put heart rate monitors on, particularly those I have a limited experience with, we also limit the volume to both younger and older players on the basis of training age but we try and maintain the same intensity, similar to this:
Year 1 – 60 – 70%
Year 2 – 70 – 80%
Year 3 – 80 – 90%
Years 4 to 8 – 100%
Year 9 – 80 – 90%
Year 10 – 70 – 80%
Year 11 – 60 – 70%
but this is only a guide so we see how each player handles the load and volume, cheers, ashley