Adrian Smith's hobby is mountain-biking and it keeps him pretty fit - and in the last few days he's been feeling grateful.
On Saturday, he had his first lesson at Herne Hill velodrome and yesterday he was being coached for two hours while he whizzed round and round the velodrome in Manchester.
He said: "The only drawback is that you have fixed wheels and have to keep pedalling. Otherwise, you go over the handlebars."
But it's all in a frantic good cause - because in a fortnight's time, Adrian's new head-down approach to cycling on steeply-banked tracks will be filmed for posterity in Dusseldorf.
The man who first became involved with the stage via Highbury Little Theatre as an 11-year old in 1979 is about to film his role as champion cyclist Chris Boardman with Jonny Lee Miller in The Flying Scotsman.
He said: "It's about Graeme Obree, who built a bike out of old BMX bikes and washing machine parts and challenged Chris Boardman for the world's hour- distance record. The Boardman bike cost £25,000 and was designed by computers."
In his early days, Adrian trod the boards with Sutton Arts Theatre, Banners Gate Musical Society and Four Oaks Musical Comedy Society - and used his job as a nurse at Good Hope Hospital, Sutton Coldfield, to pay his way through drama school in London.
His professional career, which began in the chorus of Tommy, has taken in Starlight Express, where he played the lead role of Rusty, followed by Les Mis>rables and various television roles.
This year, he's been having great fun exploring the top end of the corporate entertainment market with Tenors and Divas Incognito.
Adrian, whose mother Margaret has directed various companies in the Sutton Coldfield area, explains: "We masquerade as guests, waiters or whatever, then at some point in the evening we burst into song. You spend two hours sitting at a table, telling people lies, and then you jump on the table and start singing."
But The Flying Scotsman is not going to leave him enough breath for singing. It concentrates on the world championship races in the 1980s, when Obree and Boardman - who was Olympic champion - met in the semi-finals.
He said: "As Boardman, I lose - but I don't lose really, because I get to be in a big movie!"
Film-makers don't hang about any more than Chris Boardman did. The Flying Scotsman will take two months to complete and is due for release next year.