Intensity considers how fast you swam, how far you swam, and how much rest time you took to let you know how hard you worked.
- Speed: How fast you are swimming your laps. The faster you swim, the harder you've trained. This is measured relative to your usual swim speeds.
- Volume: The total distance swam. The longer distance you swim, the harder you've trained.
- Active vs Rest Time: Comparing the ratio of time spent swimming versus time spent resting between sets. If you swim very fast but take an extra long time to recover between sets, this is not considered as intense as a workout when you swim at the same speed but with less recovery time.
Please note high Intensity is generally a good thing, hard work gets results, but that Intensity cannot be considered apart from Readiness, which monitors your training load. Working extra hard, over training, and putting yourself at injury risk is not a desired outcome for anybody.