I just read the below quote and think it is a great example of how to many coaches and athletes over analyse everything. Keep to the basics, you don't need to over analyse, x watts, heart rate to the nearest beat, cadence 89.67, 21 grams of carbs. Over analysing causes a lot of lost training and most of all recovery time when you could be resting your brain and body from triathlon, because that is when you are actually getting fitter
I have highlighted my favourite line
Lydiard got back from a European tour in the 60s, while he was away he was introduced to the physiology of what was actually going on. He introduced to his squad the concepts such as anaerobic and aerobic exercise.
He "lost" his squad almost at the outset. Bill Ballie (world record holder 20,000m and 30,000m) chirped up saying "You mean fast stuff and slow stuff, coach?" Olympic Gold medalist Murray Halberg was even more to the point "Coach, does this change anything we are doing in training?" "No, not at all" said Lydiard. "Good, So we can cut the bull shit and get on with it!" replied Halberg.