Mighty Nimble
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Intermediate Triathlon Brick

A 25-minute swim-bike-run inspired brick session to build smooth transitions and aerobic power.

Warm-Up

Prime shoulders, hips, and heart rate for a brick-style session. 5 minutes.

Jump Rope
Jump Rope1 min
Arm Circles
Arm Circles30 sec
Bodyweight Good Morning
Bodyweight Good Morning45 sec
Glute Bridge
Glute Bridge45 sec
High Knees
High Knees1 min

Main Brick

3 rounds of swim-bike-run inspired work. Keep transitions quick and controlled. 18 minutes.

Mountain Climber
Mountain Climber30 sec
Bear Crawl
Bear Crawl30 sec
Stationary Bike
Stationary Bike2 min
High Knees
High Knees1 min
3 rounds · 15 sec rest

Cool-Down

Bring the heart rate down and open hips/shoulders. 2 minutes.

World's Greatest Stretch
World's Greatest Stretch1 min
Child's Pose
Child's Pose1 min
Neuromuscular Switching Across Disciplines

Neuromuscular Switching Across Disciplines

The Stationary Bike-to-Mountain Climber-to-Bear Crawl sequence mimics the motor pattern disruption triathletes experience mid-race, forcing your neuromuscular system to rapidly recruit glutes, hip flexors, and core stabilizers across changing demands. High Knees prime stride turnover before the run segment, reducing the quad-heavy shuffle that plagues bike-to-run transitions.

The Brick Effect: Why Your Legs Betray You

The Brick Effect: Why Your Legs Betray You

Cycling locks your hip flexors in a shortened position and floods your quads with lactate, making the first 800m of any run feel like concrete legs — this is the brick effect. The Glute Bridge and Bodyweight Good Morning in warm-up pre-activate your posterior chain so your hamstrings and glutes share the load the moment you dismount, not ten minutes later.

Compressing Adaptation Into 25 Minutes

Compressing Adaptation Into 25 Minutes

This session uses specificity and metabolic overlap — the Jump Rope elevates heart rate to aerobic threshold before the bike segment sustains it, creating continuous cardiorespiratory stress without recovery valleys. To personalize intensity, increase Stationary Bike resistance until your cadence drops below 85 RPM, then hold that effort into Mountain Climbers to simulate genuine race-pace transit

Intermediate Triathlon Brick | Mighty Nimble | Mighty Nimble