Study design and randomization
RECRUITMENT
SiFAr was a parallel group, randomized controlled trial with a duration of three years and an equal allocation to intervention and control group, stratified by gender and bicycle type (e-bikes/unmotorized bicycle). Randomization of participants was performed by trained study staff after assignment of the informed consent and the baseline assessments. The randomization allocation was computer-generated via simple random sampling by a statistician who was otherwise not enrolled in study activities. Detailed description of the trail design and randomization procedure can be found in the flow chart (see Fig. 
Flow DiagramParticipant recruitment was undertaken between June 2020 and April 2022. Data collection was completed in August 2022.