Loss of energy during a ride, and extremely tired and hungry after

[SwissVan]

No offense RZ but jissie there is a lotta over complication going on in that VA publication

 

I've tried to simplify it below, hope you dont mind me snipping it up a bit.

 

For the OP, the most important part is make sure you train enough ffor the planned event and on a consistent basis

 

 

4.Reduce the amount of exercise you’re doing.

Race-day has arrived… now what?
•Eat a light breakfast 2-3 hours before the start.

•Experiment with the different drinks and energy bars/corn-syrup products beforehand, rather than trying something new on race-day.
•Aim to drink 400-800ml of fluid an hour – this may vary depending on how hot it is on the day, how much you sweat, your race pace and your overall size. Split the amount up into small quantities every 15-20 minutes.

•Once you’ve finished your race, start re-fuelling again. Snack on a carbohydrates-rich food within 30 minutes of finishing the race – include a bit of protein for muscle recovery.

Some good post-exercise recovery snacks:
•LF energy bar  and small handful/packet of biltong
•LF drinking yoghurt and small handful of biltong
•Cheese/chicken/LF cold meat sandwich and a fruit (e.g. banana or apple)
jelly babies and handful of biltong.

 

[BLACKvoodoo]

This is why the Hub makes me laugh sometimes.

If someone say 'When I wear a blindfold I walk into things, why is that?'

The hub replies will be: 'What material is the blindfold made of? '

                                       'what did you have for breakfast at second break in grade 2?'

                                        'were you facing North or northeast when you bumped into said thing?'

 

I haven't read all of the comments but 360 with all due respect you're probably a little unfit and need to train a bit more.  

[Rocket-Boy]

I found this to be quite an interesting read.

http://www.bicycling.com/blogs/fitchick/vision-quest

Lots of talk about conditioning yourself to require less food/water on longer rides.

[andrewemslie]

Use Honey - natural energy that really works.  Make your own sachets, add to your water bottle or if you prefer convenience buy EnerB honey sachets - ask for them at your LBS or Spar.  Honey is natures wonder product and EnerB has packaged it perfectly!