Ash is one of the best and the forum is very lucky to have his services!
As both a scientist and a conditioner I agree totally with what Ash says – science does lay a foundation – but to build a house that suits an individual you have to use your intuition – conditioning is part science – part art!
Interestingly in sports science now we are (slowly!) beginning to push the individual rather than the group … each individual is slightly unique and to reach full potential needs treating that way!