Running
How to optimize brick workouts for multisport athletes preparing for triathlon running segments.
Brick workouts blend bike-to-run transitions to sharpen multisport efficiency, but precise structure matters. This guide delivers practical, realistic strategies to improve pacing, form, and fatigue management across cycle-to-run sessions, ensuring athletes transition with confidence. By integrating race-specific demands, athletes learn to sustain power, biomechanics, and cadence during the moment of change, reducing wasted seconds and optimizing run splits. Expect insights on scheduling, intensity, recovery, and test protocols that translate directly to swim-to-bike-to-run events. The approach emphasizes consistency, progressive overload, and mindful listening to your body's signals in the hours after each brick.
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Published by Henry Brooks
July 31, 2025 - 3 min Read
When athletes first start brick training, the goal is to simulate the real race sequence without overwhelming the nervous system. Begin with shorter, controlled brick sessions that pair a moderate ride with a deliberate run immediately afterward. Focus on repeating efficient transitions rather than accelerating heroically and risking early fatigue. Fitness gains come from training the neuromuscular pathways that govern cadence, balance, and stride form during the running phase after a bike effort. Use a cadence target on the bike that feels sustainable for 20–30 minutes of riding, then practice a smooth, light-on-your-feet jog or booted run that allows you to monitor form regain. Small, consistent improvements compound.
As you progress, introduce varied brick configurations to reflect race realities. Include longer bike segments followed by a run that shifts from easy to steady-state pace. The objective is to preserve running mechanics even when your legs feel heavier. Practice nutrition and fueling during the brick so you avoid GI distress when the run begins. Invest in mental routines to manage the abrupt transition: slow diaphragmatic breathing, short strides to reestablish leg turnover, and a deliberate cadence check as you cross from bike to run. Logging subjective effort alongside pace helps you tailor sessions to your unique response to fatigue and helps your captain’s clock stay accurate on race day.
Structured approaches to build endurance through bricks
The first principle is specificity paired with progressive overload. Start with brick workouts that mimic the end of a familiar bike route and the start of a run you know well. Record the exact times for each portion and monitor how long it takes to regain a normal running rhythm. Use this data to incrementally increase either ride duration or run intensity while maintaining smooth transition mechanics. Avoid chasing speed before you’re ready, because the transition period is where most athletes lose efficiency. Prioritize stable cadence, relaxed shoulders, and a controlled arm swing as you slip from pedals to pavement, keeping your mind steady for the seconds that matter most.
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Another essential factor is pacing discipline. A well-timed brick uses a ride that leaves you with enough leg energy to begin a controlled run without a dramatic shift in form. Establish a run goal rooted in perceived exertion rather than raw speed, especially in the first few bricks of a phase. Use a light-to-moderate run intensity that mirrors the target race pace for the run segment. Throughout the session, practice brief, rhythmic breathing and posture cues. Track how your hips align over the stride and whether your stride length shortens unfavorably as fatigue accrues. Small, repeatable cues help you stay present during critical moments.
Practical tips to retain form under fatigue and transition
An effective brick protocol blends endurance-building volumes with sharp, targeted run work. Start with bikes around 40–60 minutes followed by 15–25 minutes of running at a steady, controlled pace. The run should feel manageable but perceptibly taxed, forcing your body to adapt without crashing. Emphasize cadence clarity—aim for a consistent turnover around 90–95 steps per minute while running, even as fatigue climbs. After finishing the brick, perform a brief cooldown that includes mobility work for the calves, hamstrings, and glutes. This helps prevent stiffness that could carry over into the next training block and keeps you ready for the next brick session.
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In subsequent cycles, insert targeted run intervals immediately after the bike leg to simulate critical race moments. For instance, alternate 3–4 minutes of riding at a strong but not maximal effort with 2–3 minutes of brisk running, repeating until you accumulate a solid running volume. Pay careful attention to fueling during the ride so you don’t hit the wall at the start of the run. Hydration and electrolyte balance play a decisive role in how smoothly you transition. When done consistently, these practices improve running economy and help you maintain form when legs feel heavy or fatigued.
Monitoring progress with practical metrics to guide bricks
A core habit is practicing a transition technique that becomes almost automatic. On brick days, rehearse a smooth disengagement from the bike, followed by an immediate check of posture, foot strike, and turnover. Many athletes benefit from a brief, continuous focus on micro-adjustments—soft knees, a light heel strike, and an upright torso—to promote efficient propulsion into the run. The more you repeat this sequence, the less energy you squander real time during the actual race. Additionally, include occasional micro-breaks between the bike and run to stretch and reset if you notice creeping stiffness.
Building muscular balance supports brick performance. Include targeted strength work for the posterior chain, hips, and core on non-brick days. A robust core stabilizes the torso during the changeover, while strong glutes and hamstrings sustain power in the run after a cycling effort. Mobility routines should stay short but frequent, with emphasis on hip flexors and calf elasticity. Practicing these elements consistently reduces the incidence of overuse injuries and keeps you ready for longer, more demanding brick workouts as training progresses. A holistic approach yields gradual improvements that compound across weeks.
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Integrating bricks with overall triathlon training plans
Use objective indicators alongside subjective effort to judge brick effectiveness. Track run cadence, ground contact time, and vertical oscillation every few weeks to identify trends. If you notice a drop in cadence after cycling, investigate possible causes such as pedal efficiency, shoe comfort, or calf stiffness. A simple protocol is to compare two brick days with identical rides and runs, then adjust variables in small increments: ride duration, run pace, or transition time. Consistency in measurement provides clarity on what changes drive positive adaptations and which tweaks are minimally impactful. Let data inform rather than overwhelm your training decisions.
Incorporate race-day simulations that mirror the course profile you expect. Use brick sessions to emulate hills, wind, or surface changes you’ll encounter in competition. Practice running on tired legs with gradual incline work or brisk circuit repeats to mimic undulating segments. After each simulation, review how your running form recovered, how your breathing settled, and how mental focus endured during the most demanding parts. These practice runs develop better tolerance for fatigue and teach you to preserve technique even when the body begs to slow down. The aim is predictable, scalable improvements.
Brick workouts should align with the broader weekly structure, balancing swim, bike, and run sessions. Plan bricks during the mid-week block when fatigue is manageable and recovery days are available. Avoid stacking bricks back-to-back unless you are specifically preparing for a race with a tight transition. A well-designed plan alternates high-quality bricks with lighter aerobic days and focused strength sessions. Clear progression is essential: increase either the bike duration, run intensity, or frequency of transitions gradually while maintaining proper form and recovery windows. A thoughtful schedule minimizes overtraining and keeps you motivated.
Finally, mindset matters as much as mechanics. Approach bricks with curiosity about how your body responds to different transition demands, rather than chasing immediate speed gains. Visualize the moment you shift from cycling to running and rehearse a calm, efficient response. Use warm-up routines that prime the neuromuscular system for this precise changeover, and finish each brick feeling ready for the next effort. With consistent practice, you’ll notice more stable splits, reduced transition losses, and greater confidence entering triathlon runs. The cumulative effect is stronger race performance and lasting enjoyment of multisport training.
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