Efficacy of WB-EMS in Frail Older People

Simultaneous, individually adjustable stimulation of 12 muscle groups using an interval approach with a duty cycle of 6s impulse/4s rest, bipolar electric current (impulse -frequency 85Hz, -width 350μs, rectangular pattern) will be applied. After a 4-week conditioning period, 1.5x 20 min/week WB-EMS will be conducted for 12 weeks (total training duration 8 weeks). Easy to perform functional exercises focusing on balance, transfer ability, stepping, and lower extremity strength will be done during WB-EMS. Exercise intensity will be individually prescribed and adjusted by the rate of perceived exertion (RPE-Borg CR10 scale 4 (moderate) to 7 (hard)). WB-EMS will be fully supervised one-on-one.

Psycho-social intervention with participants randomized to the control group receiving (if wanted) the same social contact time (20-30 minutes/week) as the WB-EMS group. Depending on personal preferences and Covid-19 restrictions this will be done by phone or in-person one-on-one. Health-related topics and/or general chatting will be offered.