Success in road racing is all about being ready for brief explosive efforts lasting only a few minutes or seconds. Break-aways, cross winds, sprints, gaps and climbs will determine the race outcome. You have to be ready for these moments by having enough energy left to initiate or respond to the best of your ability. By the time a key move goes up the road you won’t be able to respond if you’re pulling everyone around the course and you are completely spent.
This is exactly why you need to race conservatively . In order to be successful with the moves that you either follow or create, you need all of your energy. You have a limited bucket of energy and you have no idea if the guy next you you has the same size of bucket.
The opposite holds true for training. Train aggressively ! When you’re doing your intervals or group rides (when appropriate), you need to try to spend most of your energy doing the types of things that will lead to success in races. Give it all you got! There is no consequence in burning all your matches during a training ride. It will only help your body adapt to those short bursts of effort that will be required during the winning moves of a race.