For mara races I've previously looked to take a gel every five miles. I've used a mixture of lucozade and Hi 5 gels. The Lucozade ones are abit sickly sweet and I can normally only manage 3 of these but they do seem to hit the spot energy wise. The Hi 5 ones are easier to digest but not as effective. I take the caffeine ones and since dramatically reducing my caffeine intake a year or so back (to 1 cup a day) I do get a real alertness hit from them late on in the race.
In training runs I might take one or two on long runs where I'm looking to do a segment at mara pace or faster but generally try to make do with just water and then chocolate milk when I finish.
Great time Roger. Fantastic stuff especially as it was pretty tough going into a headwind on the main road back to the stadium.
I did 86.08. 15 seconds off my pb but pretty happy as first race of the year after being out with a back problem for 5 months last year. Hopefully i can now get in/stay in shape for Brighton mara in a months time.
Rob: Give Garmin a call. I've always found them really helpful. If its within warranty they will send you a new one. If not they will do a deal on a refurb. I'm on my third refurb and aside from not coming in a shiny box you wouldn't otherwise know that its not brand new. You also get a fresh warranty.