Or in more common parlance: get on your bike!
Accounting ratios (see Challenges 17, 18 and 19) are brain work, so some healthy exercise in the open air is called for. Mens sana in corpore sano, and all that. (The longer Wikipedia quote sums up the life of the business owner quite well).
Why cycling? Most people know how to do it, it can be done in company or alone, and it requires limited equipment, to whit one bike. For many it removes the barrier of undressing in public at the gym or pool, or of displaying flesh while exercising. And it does not carry the same risk of wear and tear to the joints that running can. It can however damage a gentleman’s, er, equipment.
You do not have to cover vast distances, reach high speed, or ride over wild terrain. All these are possible, but equally John Major’s spinsters cycling to Evensong are cyclists too. Make cycling what suits you.
Exercise keeps weight off, reduces stress and leads to a healthy heart and lungs. So get that bike out, pump the tyres and find a traffic free place to ride.