I am a verified stat head. I keep a spreadsheet of my swimming yardage. I love to swim on intervals and work against the clock. I always missed that feedback playing water polo.
I recently got an Apple Watch. I intended it mostly for swimming, but I wore it for a few water polo scrimmages, out of curiosity. I’d never had any statistical insight into those workouts.
Below are examples of heart rates for a swim set and a water polo scrimmage.
The swim set is so orderly. The first plateau is my 500 yard warm-up. I go really hard to see how I’m feeling that day. Then a gap, then kicking. Then I take a break before the main swimming set. While I’m swimming, the trace is pretty constant (sometimes even more than this one), and when I take breaks, the trace drops. The fluctuations at the end are 6 x 50s, alternating between sprint and recovery.
The water polo trace is so noisy. They all look this way. You can see my warm-up and some inactivity before the play starts, but after that it gets fuzzy. The whole last 3/4 looks like the sprint/recovery set from swimming. The average BPM are nearly the same.
I love water polo and swimming, but these traces lent insight into why some people like one and not the other. I hadn’t realized just how different they were as workouts.