2013, I decided that regular cycling wasn't sufficient for fitness, not a full body workout, so I added running and various gym workouts, and some P90X. I've been fairly committed to the running thing, tracking mileage and pace. (Huge payoff in hill climbing performance.) A few months ago I decided to add a boxing coach, blast that shoulder and core development.
So, before boxing yesterday I decided it was time to get acquainted that the Stepmill machine (rotating stairs), that machine that everyone ignores at the gym. 30 minute work-out and then to boxing, after cleaning up the flop sweat. Of course, the coach decides this session will focus on leg work, so yard ladder work-out between combos. Good fun, surprisingly hard. For a Fredish guy like me, it's entertaining to think of yourself as an 'athlete' at age 61.
This morning I can hardly walk. Totally seizure of the quads and feet. Holy moly, it's going to take 30 minutes of stretching to simply get out the door. I think my point is; just when you think you have reason to be confident about your fitness level you are exposed to something new, and BLAM...you discover all the muscles you haven't been using. Crosstraining rocks; and it keeps you humble.