The 29-year-old double Olympic champion maintains his focus is on the world championships this year and trying to win the 10,000m that eluded him so cruelly in 2011 – when he lost out to Ibrahim Jeilan by 0.26 seconds – along with defending his 5,000m title.
Radcliffe disagrees that success on the track can be derailed by trying out the full distance on the road. "Just go in and do a marathon, race it hard," said the world record holder who has won the London Marathon three times. "In 2002 I ran London and then I ran all my PBs on the track. He's way more able to bounce back than me."
Radcliffe enjoyed a sensational year in 2002, winning her first marathon in the second fastest time in history, before setting a world record in the event later that year. She also won European gold over 10,000m and Commonwealth gold over 5,000m, as well as the world cross-country title.
"I wouldn't have necessarily done what he's doing in London, this year, because you're going in against people you're going to be racing against in the next year and I almost think you should go in when you're ready. He's showing his hand a little bit. I don't know … is he a pacemaker or is he just running? If he's just running he's going to be on his own. I just don't understand it."
Radcliffe believes that until Farah runs a full marathon it will be impossible to predict how he will cope, citing the example of South Africa's Elana Meyer, a former half-marathon world champion who set four world records in that event but was never able to replicate success over 26.2 miles. "She never translated to what we thought she would have run – anywhere near it – for a marathon. I don't think that's because she didn't prepare right or train hard enough or she didn't try hard enough. I don't think she was big enough.
"I don't think she had enough reserves in her to keep it going and going all the way through a marathon. She just kept hitting the wall all the time at 20-22 miles. Mo is very skinny but he's got lots of strength there. But you don't know."
Despite her questioning of his approach Radcliffe, who has been a mentor to Farah since his junior days, believes the Briton has the potential to flourish over the longer distance and is excited at the prospect. "I think he will run very well," she said, citing as one of the biggest indicators from their runs together that he rarely takes a drink. "But the depth on the men's side is scary at the moment. He could run 2hr 4min and there could be 10 people still around him. But definitely, talent-wise, from the long runs I've seen him do out in Kenya, I think he can definitely do it."
Radcliffe is once again troubled by injury and say she cannot even contemplate running a marathon right now. The 39-year-old missed the London Games because of a flare-up of a degenerative joint problem in her left foot and says that the screw inserted in her foot has come loose and is causing a lot of pain. The Briton, whose injury problems have been well documented over the years, will need yet another operation and is expecting to spend "10 days to two weeks on crutches".
"I just want to be able to run and play with my kids. At the moment if they run I just have to shout: 'Stop.' I'm not even thinking about getting back to running a marathon again."
Holly Bleasdale warmed up for the European indoor championships by comfortably beating the Olympic silver medallist, Yarisley Silva, at the Birmingham Grand Prix on Saturday.
Bleasdale, the world No1, cleared 4.70m after her world lead height of 4.77 the previous weekend, and feels she is in the form to take gold in Gothenburg later this month.
In her first race since September 2011, Jenny Meadows finished second in the 800m in 2min 2.86sec. Meadows, who missed the London Games through injury, was also delighted to receive her European indoor gold medal, an upgrade on the silver she won in Paris two years ago behind Russia's Yevgenia Zinurova, who was subsequently banned for doping.
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