The annual event, named after the late Borders rugby star Doddie Weir, encourages people to take part in an exercise challenge for five weeks from January 1.
Vital funds are raised for the charity set up by the former Scotland and Lions player, who died in November 2022 after living with MND for more than six years.
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A spokesperson for the event said: “Running, cycling, swimming, dancing, skipping, walking the dog – any exercise counts.
“You don’t have to be an athlete to make a difference during Doddie Aid.
“Simply set yourself a target and enjoy every bit of movement knowing you’re helping to fund vital MND research.”
Doddie Aid has raised millions of pounds for MND research since it was founded by former Scotland captain Rob Wainwright in 2021.
Weir’s eldest son, Hamish, is leading the Scotland team this year.
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His ‘rival’ captains include podcaster Archie Curzon for England, rugby star Edel McMahon for Ireland, and broadcaster Laura-Jane Jones for Wales.
The Doddie Aid ‘Coffee and Cake’ rides using online cycling platform Zwift have returned this year.
Started by Sir Chris Hoy, participants are asked to donate their coffee and cake money to My Name’5 Doddie Foundation.
Cyclists took part in the first ride on Sunday (January 4), with more than £1,100 raised.