How much rest do I need?
Rest is an essential part of any training programme because it’s the time when the body adapts to the stimulus that it’s received from exercise. Unless at least one day a week of rest is included in a training schedule, fatigue and staleness will quickly set in.
Learn to listen to your body – if you start to feel generally run down, and begin to pick up little injuries and minor illnesses, cut back on the amount that you’re doing and give yourself chance to recover. Don't feel guilty about taking time off from exercise – a short break will probably increase your enthusiasm when you return.
How much sleep do I need?
You may well find that exercise will help you sleep better and longer. Most people need between 7 and 8 hours of sleep a night, but if you’re exercising regularly, this will probably increase. Again, listen to your body and get the amount of sleep that you feel happy with.
Should I train when I am ill?
Almost certainly not, unless you have something very minor. Training with a cold or virus can sometimes do serious long-term damage to the body, and taking a couple of days off may well help to speed up recovery from the illness itself.