Why do triathletes train 'bricks' (bike then immediately run)?
Show answer & explanation
Answer: Adapts body to bike-run transition stress
Adapts body to bike-run transition stress ✓ — Correct! When you hop off the bike, your legs feel like bricks—that's where the name comes from! Cycling directs blood to your quads; running needs hamstrings and calves. Your body needs time to redistribute blood flow and switch neural activation patterns. Brick training teaches your nervous system to handle this transition. The heavy-leg feeling typically fades after 5-10 minutes as muscles adapt. Training bricks before race day means no surprises in competition!
Burns more calories than single workouts — Wrong. Calorie burn isn't the goal. Brick workouts train your body for the unique stress of switching sports mid-race. Blood must redirect from cycling muscles to running muscles, and your brain must change movement patterns instantly.
Builds mental toughness for race day — Wrong. Mental prep helps, but the main benefit is physiological. Your nervous system learns to activate running muscles right after cycling fatigue. Without brick training, the first kilometers of the run feel terrible—legs heavy, rhythm off.