I spotted an advertisment for a powered bicycle, described as "Automatic mini walker" in the newspaper, but as "EZY Rider mini exercise bike" in their website. The pictures of it are identical. It is a set of pedals attached to a motor, with 4 speed settings and 5 time settings. I have ordered one, it is £80 ($160).
It is described on
www.coopersofstortford.co.uk
Just realised, it will be 240volts, not USA voltage
Ron

EZY RIDER MINI EXERCISE BIKE This Electric Mini Walker will help improve strength, fitness and circulation in your arms and legs, providing essential benefits from the comfort of your own home. Ideal for convalescents, the elderly or as a gentle exercise programme, it is extremely easy to use. Just sit in your favourite chair, put your hands or feet in the stirrups and pedal as you would a bike. A few moments every day gives you the same level of workout for your upper and lower body as a daily walk or cycle ride, yet you don't even have to step outside. Its built-in computer continually displays the elapsed time, pedal revolutions and estimated calories burnt. Features include: four speed settings, five time settings, LCD display and easy touch controls. Measures H29cm x W41cm x D45cm (10 1/2ins x 16ins x 17 3/4ins). Just a few minutes a day of gentle exercise and you will soon feel the benefit. Mains powered with a 1.9m (6ft 3ins) cable. Tell A Friend Price: £79.99 Qty: 1 2 3 4 5 6 7 8 9 10

In the newspaper advert, it says, "it will automatically pedal like a bike, alternatively, use in manual mode for a more strenuous workout."