Fit at 50: Your Guide to a Stronger, Fitter, and Happier (Mid) Life in Just 6 Weeks
| Country | USA |
| Brand | Ballantine Books |
| Manufacturer | Ballantine Books |
| Binding | Paperback |
| ItemPartNumber | 9780399594441 |
| Color | White |
| ReleaseDate | 2017-08-15 |
| UnitCount | 1 |
| Format | Big Book |
| EANs | 9780399594441 |