Have you ever used a personal trainer?

[Holladay]

I try and keep the work outs as efficient as possible. Thus for the aerobic side my fall back is rowing (when I can't swim). Very much all body with the exception of pecs and biceps (I do rowing sets curling instead of the normal pull). You can do all sorts of exercises: lat pull downs, tricep extensions, dips, shoulder shrugs etc. A good row does pretty much all of them with the least amount of time and low impact on the joints.