Triathlon Run Training: Complete Running Guide

Triathlon run training differs from pure running because your legs must perform after swimming and cycling—requiring specific brick workouts and pacing strategies.

Running in triathlon is unique. You start with fatigued legs, depleted energy stores, and a body that's been working for hours. This guide covers how to train specifically for the triathlon run.

What Makes Triathlon Running Different

The Challenge

The Reality

Your triathlon run will be:

• 10-20% slower than fresh running
• More mentally challenging
• Dependent on bike pacing
• Affected by nutrition choices

Run Targets by Distance

Pace Expectations

Calculate your expected pace: Running Pace Calculators

Weekly Training Structure

Sessions Per Week

Session Types

Key Workouts

1. The Long Run

Purpose: Build endurance, mental toughness

Duration: 60-180 min (by race distance)
Intensity: Easy, conversational (Zone 2)

Structure:
- Steady pace throughout
- Practice nutrition (for longer)
- Focus on form when tired

Long run targets:

• Sprint: 45-60 min
• Olympic: 60-90 min
• Half Ironman: 90-150 min
• Ironman: 150-180 min

2. Brick Run

Purpose: Adapt to running on fatigued legs

After bike workout:
- Quick transition (practice)
- Start very easy (first 5-10 min)
- Build to race pace
- Duration varies by race distance

Brick run duration:

• Sprint prep: 15-20 min
• Olympic prep: 20-30 min
• Half Ironman prep: 30-60 min
• Ironman prep: 45-90 min

More details: Running Off the Bike

3. Tempo Run

Purpose: Build threshold fitness, race-pace practice

Warm-up: 10-15 min easy

Main Set:
  20-40 min at tempo pace
  (Comfortably hard, can speak in short sentences)

Cool-down: 10 min easy

Total: 40-60 min

4. Interval Session

Purpose: Build speed, improve running economy

Warm-up: 15 min easy

Main Set Options:

1K Repeats:
  5 x 1km at 5K pace
  2 min recovery jog

400m Repeats:
  10 x 400m at mile pace
  90s recovery jog

Cool-down: 10 min easy

Total: 45-55 min

5. Easy Run

Purpose: Recovery, aerobic base

Duration: 30-50 min
Intensity: Easy, conversational
Heart rate: Zone 1-2

Key points:
- Should feel effortless
- Recovery priority
- Don't chase pace

Running Form for Triathlon

Key Elements

Posture:

• Tall spine, slight forward lean
• Eyes forward, not down
• Relaxed shoulders

Cadence:

• Target: 170-180 steps/min
• Higher cadence reduces impact
• Especially important when tired

Foot Strike:

• Land under center of mass
• Light, quick steps
• Don't overstride

Arms:

• 90-degree bend
• Forward-back motion (not across body)
• Relaxed hands

Form Under Fatigue

When tired, focus on:

1. Running tall (don't slouch)
2. Quick turnover (maintain cadence)
3. Relaxed shoulders and hands
4. Forward eyes

More on form: Triathlon Run Cadence

Training by Race Distance

Sprint Triathlon (5km run)

Weekly volume: 20-30 km Key sessions:

• Long run: 45-60 min
• Intervals: Short, fast (400m-800m)
• Brick: 15-20 min after short bike

Focus: Speed and transitions

Olympic Triathlon (10km run)

Weekly volume: 30-45 km Key sessions:

• Long run: 60-90 min
• Tempo: 20-30 min at race pace
• Brick: 25-35 min after 90-min bike

Focus: Sustained pace, brick adaptation

Half Ironman (21.1km run)

Weekly volume: 40-55 km Key sessions:

• Long run: 90-120 min
• Tempo: 30-45 min at HM pace
• Brick: 45-60 min after 3-4 hr bike

Focus: Endurance, pacing discipline

Ironman (42.2km run)

Weekly volume: 50-70 km Key sessions:

• Long run: 2-3 hours
• Marathon pace: 45-60 min at IM pace
• Brick: 60-90 min after 5+ hr bike

Focus: Time on feet, nutrition, mental

Pacing Strategy

The Golden Rule

Start slow. You will never regret starting too conservatively.

Pacing by Segment

Negative Split Goal

Ideal execution:

• Second half faster than first
• Builds confidence
• Saves energy for late race

More details: Triathlon Run Pacing

Common Mistakes

1. Running Too Much

The problem: Treating triathlon like a running event The consequence: Overtraining, injury The fix: Balance all three disciplines

2. Neglecting Bricks

The problem: Never running off the bike The consequence: Shock on race day The fix: Weekly brick runs

3. All Easy or All Hard

The problem: No training variety The consequence: Limited improvement The fix: Polarized approach (mostly easy, some hard)

4. Wrong Pacing in Races

The problem: Starting too fast The consequence: Walking late in race The fix: Conservative start, negative split

5. Ignoring Form

The problem: Sloppy form when tired The consequence: Inefficiency, injury risk The fix: Form drills, form focus in training

Injury Prevention

Common Triathlon Running Injuries

• IT band syndrome
• Plantar fasciitis
• Shin splints
• Knee pain
• Achilles issues

Prevention Strategies

Training:

• Gradual volume increases (10% rule)
• Recovery days between hard sessions
• Variety in terrain and pace
• Strength training

Recovery:

• Foam rolling
• Stretching
• Adequate sleep
• Proper nutrition

Equipment:

• Appropriate shoes (properly fitted)
• Replace shoes regularly (300-500 miles)
• Multiple pairs to rotate

Sample Training Week

Olympic Distance Build Phase

Related Resources

• Running Off the Bike - Transition running
• Triathlon Run Pacing - Race execution
• Brick Workouts Triathlon - Key sessions
• Triathlon Run Intervals - Speed work
• Easy Running for Triathlon - Recovery runs
• Olympic Triathlon Run Training - Distance-specific