EXERcise and changes in executive functions and pre-frontal BRAIN activity during walking

INTERVENTION: Participants are randomised to one of two groups: Intervention Group: Receives a progressive dance video game training performed during 30 minutes, three times per week, on dance pads. The program lasts 8 weeks. Control Group: Receives an intervention with progressive balance training and additional stretching exercises for the same time period and with an equal frequency and training duration. CONDITION: Video‐exergame training intervention in elderly ; Not Applicable PRIMARY OUTCOME: Near‐infrared spectroscopic (NIRS) imaging to assess bilateral increase of oxygenated hemoglobin (oxyHb) in the prefrontal cortex during treadmill walking SECONDARY OUTCOME: 1. Cognitive functioning (shifting, inhibition and updating): paper & pencil test / measured at baseline and three months; 2. Short physical performance battery (SPPB): physical performance test / measured at baseline and three months INCLUSION CRITERIA: 1. Aged 65 years or older 2. Living independently or in a retirement home 3. Being able to walk 10 minutes without a break on a treadmill 4. Being healthy (self‐reported) 5. Having given written informed consent