247SportTools
Triathlon · Training

Triathlon Brick Session Timer

Time your brick training session — combined bike and run with a fast transition.

Brick session timer

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Frequently asked questions

Why do brick sessions feel so hard?

The quadriceps adapt to the circular pedalling motion during cycling; transitioning to running requires different muscle recruitment patterns. The 'brick legs' feeling (heavy, unresponsive legs at the start of the run) diminishes with regular brick training and typically passes after 5-10 minutes of running.