Trigirl’s High-Intensity Triathlon Training. Today is High-Intensity Swim Day!

This HITT – high-intensity swim session will help build strength and increase your aerobic and anaerobic thresholds in very little time. If it feels tough – good! The results are worth it and you can do it!!

Getting Started

If you’re new to Trigirl’s weekly HITT training, see our introduction for more information on HITT. Here we explain how it works and how to approach the sessions. Though high-intensity training has been proven safe, if you are starting a new exercise plan (whether traditional triathlon training or HITT), it’s always a good idea to speak with your doctor.

Your HITT Session for the Week:

This high-intensity swim session has longer intervals than our last HITT swim session, but try to keep up the intensity. For the sprint intervals, the goal is efforts around 90% of MHR (maximum heart rate). It should feel HARD. If you’re training without a heart rate monitor, think ‘all out’.

You may need to gradually build speed and endurance over a few weeks, but don’t give up!


Warm-up (10mins):
5 minutes, easy swim
3 minutes front crawl, increasing speed gradually throughout

2 minutes, changing between front crawl and kicking every length



Interval Set:
Sprint 50 metres (2 lengths), swim slowly (active recovery) one length, repeat four times
Sprint 1 length kicking hard (no arms), active recovery one length, repeat four times
Sprint 25 metres, active recovery 25 metres, sprint 25 metres, active recovery 25 metres. Rest at the wall for 20 seconds, repeat four times.

Cool Down (5 minutes):
2 lengths easy kicking

Swim easy for the remaining time, mixing breaststroke, backstroke and front crawl


Happy HITT training!

High-Intensity Swim Training - Trigirl HITT

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