Endurance & hybrid
phase.fitness for triathletes
Three sports do not make the recovery budget three times bigger. phase.fitness plans swim, bike and run in one week with at most two or three hard sessions across all of them, the long sessions protected, and the gym kept heavy, short and out of the way.
Updated
The short answer
phase.fitness plans triathlon with the endurance document's periodization across three sports — base at ~90% easy, build on 80/20, race-specific peak, taper — and the ordering rule that matters most: a quality session in one sport is a hard day for all three, so the week holds two or three of them and the long bike and long run get the clean slots. Strength is one or two heavy, short sessions of 3–4 × 3–6. Sessions go to Garmin by sport — running, cycling and swimming by name — and to Intervals.icu with intervals intact; completed ones come back and shape the next phase, Garmin's only if you allow it.
How do you fit strength training into triathlon training?
One or two heavy, short sessions a week of 3–4 sets of 3–6 reps, placed after easy days and never before a key session. phase.fitness keeps them through the build, as its endurance document prescribes, and counts them against the same recovery budget as the swim, the bike and the run.
Can a triathlon plan send swim and bike workouts to my Garmin?
Yes. phase.fitness sends running, cycling and swimming to Garmin with their own sport type, so the watch opens the right activity, and Intervals.icu receives every session with intervals intact. Completed sessions come back, and the next phase rebalances the three sports if one keeps getting cut — Garmin activities used by the AI only if you allow it.
Your week, honestly
One sport eats the other two.
The bike gets the hours, the run gets what is left, the swim gets skipped — and the plan never notices.
Three hard days become six.
A hard swim, a hard bike and a hard run each feel like their own thing, and together they are a week with no easy day in it.
The watch knows more than the plan.
Every session comes back by sport with zones and duration, and nothing on the planning side reads it.
What phase.fitness does about it
Two or three quality sessions across all sports, the long bike and long run protected, swims filling the easy days — laid on the calendar with the rules applied.
Strength that stays
One or two heavy, short sessions after easy days, never before a key one — the endurance document says dropping it costs economy in both running and cycling.
Running, cycling and swimming reach the watch with their own sport type; Intervals.icu gets every session with the intervals intact.
Rebalanced each phase
When the log shows the run was cut to make room for the bike three weeks running, the next phase rebalances the week instead of repeating it.
Programs to start from
Each of these is a page of its own, with the phases, a sample week and the evidence behind it.
CSTriathlon training plan: three sports and one strength day12–20 wk · 6 d/wk · intermediate
CSCycling training plan built on power zones and real strength12–20 wk · 5–6 d/wk · all levels
CSHalf marathon training plan that keeps you strong10–14 wk · 4–6 d/wk · all levels
SKDryland strength and conditioning for swimmers8–16 wk · 2–3 dryland d/wk · all levelsThe apps you already use
The evidence
The documents this page is built from
These are the knowledge-base documents the phase.fitness generator reads for this case. The phases, bands and weekly numbers above are transcribed from them.
- Physiological Optimization for Long-Distance Performance — updated 2026-02-21, endurance
- Physiology and Programming for Aquatic Performance — updated 2026-02-21, swimming
Frequently asked questions
Does phase.fitness coach swimming?
No. The aquatic document phase.fitness reads says technique comes before fitness, and that is a coach's job. phase.fitness plans the swim sessions by zone and duration, pushes them to the watch as swims, and reads them back.
How many hard sessions a week?
Two or three across all three sports. A quality session in one sport is a hard day for all of them, so phase.fitness caps the week and keeps the long bike and long run in the clean slots.
Is there a brick session?
Yes, in the phase.fitness peak block: race-specific sessions with a short run off the bike, and goal-pace segments inside the long sessions.
The only app that plans strength, cardio and calisthenics together
For a triathlete the calisthenics day is scapular control and trunk stiffness — L-sit and hollow holds, straight-arm work — the qualities swimming and the aero position both erode.
Right now, phase.fitness is the only training app that writes strength, cardio and calisthenics into one periodized program — same calendar, same phases, same recovery budget.
You choose the mix. A calisthenics-only plan, a cardio-only block, strength plus cardio, or all three: the phases, the end-of-phase analysis and the sync work the same way with one modality or three.
Why calisthenics is in the plan
Bodyweight skill work is strength training in a different shape. Straight-arm work, levers and handstands build scapular control, tendon capacity and relative strength that barbell and machine work leave untouched, and they transfer because they are closed-chain, whole-body patterns. Treated as a modality rather than a warm-up, they get sets, holds and progressions like a squat does.
No exercise catalogue on the market contains a tuck front lever, so those sessions run in the phase.fitness built-in player; strength goes to Hevy, Liftosaur or a Garmin watch, cardio to Garmin and Intervals.icu. How the skill work is programmed.
Free to start, no card. Connect the apps you already use and build the first phase.