My family visited the Mile End Climbing Wall recently and in the park close to the canal was an Outdoor Gym. It was like an adult playground but with treadmill, exercise bikes, cross trainers,etc. It was great fun ! . This the company http://www.tgogc.com/ ( The Great Outdoor Gym Company )
On their web site they say:-

Park Leisure to supply Great Outdoor Gyms to Local Authorities

The Great Outdoor Gym Company is really pleased to be working with Park Leisure to launch the Green Legacy Gym and the Street gym within Local Authorities. Park Leisure has a proven track record of high quality installations and exemplary customer care in Local Authorities in the UK.
If you are from a Local Authority please contact a representative of Park Leisure : http://www.parkleisure.com or telephone 0800 0197009[/i]

Madasahat