For who
For intermediate to advanced swimmers ready to push limits and improve endurance under fatigue. Perfect for developing aerobic threshold and race durability.
Endurance
Threshold Breaker
Endurance • Threshold • Performance
Push the limit. Break your threshold.
24
Workouts
3600
Avg. Metres
63
Avg. Mins
SYNCS WITH:
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WATCHWATCHWATCHWATCHWATCHWATCHWATCHTraining focus
Workouts blend sustained efforts, descending sets, and focused pacing — designed to boost stamina, stroke efficiency, and control under fatigue.
What to expect
Challenging workouts focused on raising your lactate threshold. Includes longer aerobic efforts, threshold intervals, and technique work to help you hold pace longer without breaking down.
Equipment you need
You can adjust the equipment to suit your preferences and available gear.
How to get started
Download DuoSwim, start your first workout, and build momentum this week.
Step 1
Download the app
Download DuoSwim and log in to unlock your plan and workout guidance.
Step 2
Choose your plan
Start your recommended plan or choose the one that fits your goal and schedule.
Step 3
Start your workouts
Follow your workouts with clear pacing, intervals, and progress tracking built in.
Step 4
Hit your goal
Stay consistent each week, build momentum, and reach your goal with confidence.
Results you will get
- ✓Improve lactate threshold and aerobic stamina
- ✓Hold pace longer with less fatigue
- ✓Refine technique at high intensity
- ✓Complete focused test sets to measure aerobic gains
Testimonials
- 700 swimmers training with this plan
- • “The test sets really pushed me — and paid off.” – Russ
- • “Felt my fitness jump within a few weeks.” – Nina
- • “Perfect blend of endurance and pacing.” – Jamie
Distance by intensity zone
Breakdown of distance covered in each heart rate zone per workout.
Z1Z2Z3Z4Z5
Workout structure
Preview the structure of this plan with workout names, estimated duration, and distance.
Threshold Foundations
53 min · 3000m
Descend & Hold
63 min · 3600m
Kick, Pull & Swim
56 min · 3200m
IM Threshold
56 min · 3200m
Threshold Flow
60 min · 3400m
View all workouts
Smooth To Strong
58 min · 3300m
Pace To Power I
67 min · 3800m
Smooth & Threshold
67 min · 3800m
Drop Set
67 min · 3800m
Threshold Fusion
63 min · 3600m
Descend & Drive
60 min · 3400m
Threshold Grind I
70 min · 4000m
Drop & Go
70 min · 4000m
Long Haul Descend
61 min · 3500m
Pyramid Flow
70 min · 4000m
Threshold Medley
56 min · 3200m
Pace To Power II
67 min · 3800m
Pull & Split
61 min · 3500m
Ultimate Drop Set
70 min · 4000m
Threshold Builder
61 min · 3500m
Long Haul
70 min · 4000m
Descend & Fire
61 min · 3500m
Yellowline Repeats
58 min · 3300m
Threshold Grind II
70 min · 4000m
Dryland
We recommend Strength Gains to pair with this plan — building strength under fatigue to support tough threshold swim efforts.
Start building your engine.
First week free. Cancel anytime.
FAQ: All you need to know about Threshold Breaker
Answers to common questions about this plan, equipment, pacing, and getting started.
For intermediate to advanced swimmers ready to push limits and improve endurance under fatigue. Perfect for developing aerobic threshold and race durability.
Take your swimming to the next level
A clear, structured path that helps you train with confidence and keep progressing week by week.
First week free. Cancel anytime.
Threshold Breaker
Start now