David Millar has expressed concerns regarding the extent to which some parents push their children, reports The Times. The ex-pro and commentator believes that there should be no rush for children to take up competitive cycling early and suggests that those with “the endurance gene” can have success even if they start relatively late.

Speaking at the Edinburgh Book Festival, Millar said that you “can’t turn donkeys into racehorses,” and expressed his belief that much of what makes a professional cyclist is genetic.

A father of two sons, Millar said he was wary of becoming a “psycho father” himself but hoped his experience would mean he is quickly able to tell whether either has any promise.

“I get a little bit worried about the modern generation of parents pushing their kids so much. We have seen the amazing success [in cycling] . . . but that has come from hard work and serendipity. You can’t turn donkeys into racehorses. It is an endurance gene: that is the thing that you must have.”

Millar sees no reason for children to prioritise a particular sport and advocates trying all sorts of different activities to ensure a broader experience. “You can start at 15. Look at Chris Froome; he was nearly getting killed by rhinos aged 14. If you have energy to put into your kids, put it into learning lots of different sports.”

Earlier in the year, Millar took on a role mentoring riders on British Cycling’s men’s academy programme following its relocation to Italy. His past ban for doping has led some to argue that he is unsuitable for the position, but he believes his history will help.

“I have been there and done it all recently, good and bad. It will make that world seem real to them. I’m still close to what they are dreaming of. They can ask me things and they will know they will get real-life experiences as an answer. It’s not just a matter of telling them what not to do, but why.”

Speaking to The Telegraph about working with young riders last month, he said:

“I didn’t get my first road bike until I was 15. I had never ridden over 100 miles until I went over to France when I was 18. I hate the thought of 15-16-year-olds going out on five-hour rides. Twelve-year-olds in full Lycra on road bikes.

“I would like to get to the point where we are producing Peter Sagans; guys who are into mountain biking and BMX, so when they get to road bikes at 15 or 16 it’s all new. And then go on a track. And then get to the GB Academy and try to follow in footsteps of G [Geraint Thomas] or [Mark] Cavendish or [Peter] Kennaugh. It’s all set up for them here.”