0:21:05 > 0:21:08This is Blue Peter...but mini.
0:21:08 > 0:21:11Expect epic adventures, makes, bakes, badges, pets,
0:21:11 > 0:21:14presenters and your post.
0:21:14 > 0:21:15We've only got five minutes
0:21:15 > 0:21:18so get ready for your Blue Peter adventure.
0:21:20 > 0:21:22I am at Blackheath in London
0:21:22 > 0:21:23at the start line of the London Marathon,
0:21:23 > 0:21:27where thousands of other people are trained really hard for this.
0:21:27 > 0:21:28I suffered a pretty bad knee injury
0:21:28 > 0:21:32but I can now officially confirm that I am ready to do this.
0:21:33 > 0:21:35What have I let myself in for?
0:21:35 > 0:21:38This world-famous race is one of the most gruelling
0:21:38 > 0:21:40and toughest sporting events going.
0:21:40 > 0:21:45Today, 37,000 runners will attempt to run a massive 26.2 miles,
0:21:45 > 0:21:48bringing the centre of London to a standstill.
0:21:48 > 0:21:50But that's not important.
0:21:50 > 0:21:52What's important is this -
0:21:52 > 0:21:54the Blue Peter Sport Badge.
0:21:54 > 0:21:55That's the whole reason I am doing this
0:21:55 > 0:21:58and I've got to remember that when things get difficult.
0:21:58 > 0:22:01Now, the boys can't be on the start line with me but I'm not alone.
0:22:01 > 0:22:03I'm joined by experienced marathon runners Amy and Bev.
0:22:03 > 0:22:05- Hey, guys.- Hello.
0:22:05 > 0:22:07Now, Amy, you've got Barney through a 10k before.
0:22:07 > 0:22:09The marathon is about four times that.
0:22:09 > 0:22:11So do you think you can get me to the finish line?
0:22:11 > 0:22:14- Please tell me you can.- I will, don't worry. You're going to be fine.
0:22:14 > 0:22:17The London atmosphere's amazing as well, you'll enjoy it.
0:22:17 > 0:22:18Well, everyone's getting ready.
0:22:18 > 0:22:20They're queuing, ready for the start line.
0:22:20 > 0:22:23- So should we go run the London Marathon?- Let's do it.
0:22:23 > 0:22:27There's no getting out of it now. It's race time.
0:22:27 > 0:22:30Three, two, one!
0:22:30 > 0:22:32- Go! - HORN BLARES
0:22:33 > 0:22:35This is it, see you at the end!
0:22:39 > 0:22:42I'm making good progress over the first three miles.
0:22:42 > 0:22:47It's taken me just over 25 minutes to get this far. Not bad.
0:22:47 > 0:22:49Thumbs up, Linds.
0:22:51 > 0:22:54There are thousands of runners being cheered on by their family
0:22:54 > 0:22:57and friends and luckily, I have got Radzi and Barney.
0:22:57 > 0:22:59But they only have one chance to see me en route
0:22:59 > 0:23:02before they must brave the crowds to get to the finish line.
0:23:02 > 0:23:05At this point, Lindsey will have run six miles.
0:23:05 > 0:23:07She's still got 20 miles to go. Go on, son.
0:23:07 > 0:23:09As you can see, everyone is very excited about being here.
0:23:09 > 0:23:12Yes, Ironman's here!
0:23:12 > 0:23:13Go on, Ironman!
0:23:16 > 0:23:20About to see Barney. I'm so excited!
0:23:20 > 0:23:22I am still feeling really energetic.
0:23:22 > 0:23:25I just can't wait to give Barney a hug.
0:23:25 > 0:23:27- How you doing? Are you all right? - Yeah, really good.
0:23:27 > 0:23:29- How are you feeling? - All right.
0:23:29 > 0:23:32I feel really good, actually. Yeah, I feel good. I'm loving it.
0:23:32 > 0:23:34Tell us about the crowd spurring you on.
0:23:34 > 0:23:36They keep shouting my name and shouting, "Blue Peter."
0:23:36 > 0:23:39- So far, like, one of the best days of my life.- Have a good one, Linds.
0:23:39 > 0:23:42See you in a bit. Go on, Linds!
0:23:42 > 0:23:44I've got to go and try and catch up with her now, though.
0:23:44 > 0:23:45See you in a bit.
0:23:45 > 0:23:49I'm doing well and next I am seeing Radzi at the nine mile point.
0:23:49 > 0:23:50Eight miles done!
0:23:54 > 0:23:56Linds!
0:23:58 > 0:24:00- Nine miles!- Nine miles!
0:24:00 > 0:24:02- How are you feeling?- I feel fine!
0:24:02 > 0:24:05- Do you?- Yeah, I feel really fine. I feel great.- Yes! Amy!
0:24:05 > 0:24:08- How are you getting on? - Oh, she's amazing. She is flying.
0:24:08 > 0:24:11There is Blue Peter fans who have been holding up banners for me.
0:24:11 > 0:24:13I've been trying not to cry.
0:24:13 > 0:24:16Like, it's honestly one of the best days ever.
0:24:16 > 0:24:1917 miles to go and the next time I will see the boys
0:24:19 > 0:24:21is hopefully at the finish line.
0:24:21 > 0:24:23So I'm going to have to dig deep.
0:24:24 > 0:24:26That's the bridge.
0:24:26 > 0:24:28My only aim was to get there feeling good
0:24:28 > 0:24:30and I've done that.
0:24:30 > 0:24:33After this, we just have to see what happens.
0:24:40 > 0:24:44Every step I take now is a step closer to the end.
0:24:44 > 0:24:45We have just got to keep going.
0:24:45 > 0:24:48Amazing to think that some of the elite runners
0:24:48 > 0:24:49are just there, finishing.
0:24:54 > 0:24:5517 miles in
0:24:55 > 0:24:58and one of the crew grabs me for an update.
0:24:58 > 0:25:01- How are you doing?- So far so good.
0:25:01 > 0:25:04But I am really starting to feel the pain.
0:25:04 > 0:25:07And I am just trying not to cry.
0:25:07 > 0:25:09I just want to be on the finish line now.
0:25:09 > 0:25:11I am really struggling.
0:25:11 > 0:25:14I just need to stay positive.
0:25:15 > 0:25:17So tired. 21 miles.
0:25:19 > 0:25:20I just want to finish now.
0:25:26 > 0:25:27It's the final stretch.
0:25:27 > 0:25:30I'm in so much pain and all I want to do is walk,
0:25:30 > 0:25:32but I can't let this beat me.
0:25:34 > 0:25:36Nearly there. We're on Big Ben, now.
0:25:42 > 0:25:44It's quite frustrating to be on the finish line
0:25:44 > 0:25:46and all you're looking for is one face.
0:25:46 > 0:25:48There's a sea of so many hundreds of different people.
0:25:48 > 0:25:51And there's only one person we're all really interested in.
0:25:57 > 0:25:58I can't feel my legs
0:25:58 > 0:26:01and I've never been so tired in all my life.
0:26:01 > 0:26:03But at last, I've made it.
0:26:03 > 0:26:07And the first thing I need is a hug from my mum.
0:26:09 > 0:26:11Well done, well done.
0:26:11 > 0:26:16- How are you doing?- I'm so tired. - Well done. That was amazing.
0:26:16 > 0:26:18- That was absolutely amazing. - Hey, Radzi.
0:26:18 > 0:26:21You've done so, so, so well.
0:26:21 > 0:26:22What kept you going? What was in your head?
0:26:22 > 0:26:26Just knowing you guys would be here and...that sport badge.
0:26:26 > 0:26:28That was the hardest thing I've ever done.
0:26:28 > 0:26:32Lindsey, that badge is all about inspiring people at home
0:26:32 > 0:26:34and your face right now, the way you're breathing,
0:26:34 > 0:26:37- the way you're standing, the way you can't feel your legs...- I can't!
0:26:37 > 0:26:38That is inspiration.
0:26:38 > 0:26:40That's the most impressive thing you've ever done.
0:26:40 > 0:26:43Up high. Come on, go and get yourself some sugary drinks.
0:26:43 > 0:26:45Oh, I feel like I'm going to fall over!
0:26:49 > 0:26:52Join in every Thursday on CBBC.