hi everyone, i have returned to mountain biking after a 10 year break and want to do some 100k endurance events next year, i know i dont stand a chance of winning but i would like to come in the top 60% basically i have given up a 40 a day smoking habit 6 weeks ago, changed to a completely healthy diet, and im riding off road about 4 hours a week averaging about 8 mph. has anyone got any tips or advice about training for these sort of events. if it helps im 32 years old 13 stone and 5 ft 10" tall. any help would be great.