• First, stop and recover. Take it easy. Your legs will feel tired and stiff, and you won't feel like going out for another run immediately.
• Once rested, go for an easy walk each day, for a couple of days. This will help your legs recover faster and you'll feel better for it.
• Your endurance levels will now be at their highest. If you stop running now, the hard work of the last few months could go to waste. By cutting back on the miles and running faster, you can maintain a high level of fitness.

Thank you for taking up the challenge and for supporting Cancer Research UK.

Please send your sponsorship money (cheques made payable to "Cancer Research UK", no cash please) using the paying in form in your pack. Please also send your sponsor forms so we can claim the Gift Aid.

Please use our paying in form (PDF) if you have lost your copy.

You will be sent a receipt for the amount you have raised. Please note it may take a few weeks to process.

If you have just completed a 5k run, you may want to try a 10k event. Or, after the thrill of a marathon you may find the London Triathlon offers a different challenge. Why not take a look at the full list of events?

Regular donations are vital to Cancer Research UK as they allow us to plan our research into the future. Set up a direct debit online today!

Visit our Donate in Memory website. It's a valuable and positive way to celebrate the life of a loved one.

Thank you for your support.