Endurance & hybrid
phase.fitness for runners who lift
Your running plan ignores the gym and your gym plan ignores the long run. phase.fitness writes both into one week, keeps the strength heavy and short, and puts it where it cannot spoil the run that matters.
Updated
The short answer
phase.fitness plans running from the endurance document its generator reads — base at ~90% easy, build on 80/20 with tempo and VO2max work, a race-specific peak and a taper — with the cardio engine ramping volume by level and never past what your level allows. Two strength sessions of 3–4 sets of 3–6 reps sit after easy runs and never before a quality one. Runs go to Garmin Connect and Intervals.icu with intervals and zones intact; completed runs come back the same way, and the next phase is built from them — from Garmin, only if you allow it.
What should runners do in the gym?
Two heavy, short sessions a week of 3–4 sets of 3–6 reps — squat, hinge, single-leg and calf work — placed after easy runs and never before a quality session, dropping to one in the peak. That is the dose phase.fitness takes from its endurance document: enough load for economy and resilience without heavy legs on tempo day.
Can a running plan be sent to my Garmin automatically?
With phase.fitness, yes: planned runs go to Garmin Connect and Intervals.icu as structured workouts with intervals and zones intact, and through Intervals.icu they also reach Apple Watch, Suunto and COROS. Completed runs come back and shape the next phase — Garmin activities are used by the AI only if you allow it.
Your week, honestly
The plan is a spreadsheet of distances.
It does not know your level, so week one is too much or too little, and it never changes when a week goes wrong.
Lifting feels like cheating on the plan.
So it gets skipped, and the document phase.fitness reads says that costs 3–8% of running economy — the thing that fails first when glycogen runs low.
The watch has the data and the plan does not.
Every run comes back with heart rate and pace, and nothing on the planning side reads it.
What phase.fitness does about it
Phases from the endurance document
Base, build, peak and taper with the distributions the document prescribes, and quality sessions that appear only when your endurance level allows them.
Volume ramp by level
A sedentary starter gets walk-run sessions and a 150-minute ceiling; a trained runner gets threshold work and a 10% ramp. The level is re-read from your logs at each phase.
Strength that survives the build
Two heavy, short sessions after easy runs, one in the peak — the dose the endurance document gives for economy and injury resilience.
Planned runs are pushed to Garmin Connect and Intervals.icu; completed ones come back automatically.
Programs to start from
Each of these is a page of its own, with the phases, a sample week and the evidence behind it.
CS5K and 10K training plan, with the lifting built in8–12 wk · 4–5 d/wk · all levels
CSHalf marathon training plan that keeps you strong10–14 wk · 4–6 d/wk · all levelsCSMarathon training plan with strength that survives the build14–18 wk · 5–6 d/wk · intermediate
CSRunning and lifting in the same week8–16 wk · 5–6 d/wk · all levels
CSTrail and ultra training plan: vert, descents, eccentric legs12–20 wk · 5–6 d/wk · intermediateThe 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
- Vertical Endurance and Eccentric Tolerance for Trail Running and Hiking — updated 2026-08-23, trail running
Frequently asked questions
Does phase.fitness write running plans for beginners?
Yes. phase.fitness asks your endurance level and starts a sedentary or novice runner on walk-run and easy continuous sessions, adding a few minutes per session with a weekly ceiling. Quality work appears only once the level allows it.
Can I keep using Strava?
Yes, as your feed. phase.fitness imports nothing from Strava — your runs reach it through Garmin Connect or Intervals.icu — and planned runs go to those two, because Strava has no way to receive a planned workout. Sessions you finish in phase.fitness can be posted to Strava.
How much lifting is in a running plan?
phase.fitness plans two heavy, low-volume sessions a week in base and build, one in the peak, always after easy runs and never before a key session — the endurance document's prescription for economy.
The only app that plans strength, cardio and calisthenics together
For a runner the calisthenics day is trunk and single-leg control — hollow and L-sit holds, pistol-squat steps — cheap on recovery and paid back on the last kilometre.
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.