STRN

STRN is the training app built for Hyrox athletes, CrossFit competitors,
and hybrid lifters who balance strength, conditioning, and recovery.

Running and lifting on the same day destroys generic workout trackers.
They count your bench press and ignore your 5k. STRN watches both — and
the recovery model knows that yesterday's wall balls hit the same
muscles as today's thrusters.

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HYROX RACE PREP
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• Hyrox race simulations — practice the full format: 8×1km runs + 8
functional stations, back to back, with pacing targets.
• Station-by-station breakdowns: SkiErg, Sled Push, Sled Pull, Burpee
Broad Jumps, Rowing, Farmer's Carry, Sandbag Lunges, Wall Balls.
• Hyrox results lookup — search any athlete's splits from past races at
results.hyrox.com and see your fastest/slowest stations side by side.
• Pacing tools: compare your current run/station splits to your target
race pace.

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CROSSFIT & HYBRID TRAINING
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• Log WODs alongside strength work — AMRAPs, EMOMs, For Time, chippers,
metcons. Time-based exercises sit next to weight × reps in the same
session.
• 1,400+ exercises including Olympic lifts, gymnastics, kettlebell flows,
and every Hyrox station — with GIF demonstrations and form tips.
• Mix modalities in one session: back squat → Echo bike → pull-ups →
dumbbell snatches. STRN tracks fatigue across all of them.
• Full body + metcon routines in the library, or build your own split.

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RECOVERY THAT ACTUALLY WORKS
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Hybrid athletes get destroyed by generic recovery models. STRN watches
everything that affects fatigue:

• Per-muscle readiness for 12 muscle groups — not a single "recovery
score". Your legs can be fried while your upper body is ready.
• CNS fatigue tracking — heavy cleans, deadlifts, and sprints tax the
same nervous system. STRN knows when you're peaking vs. overreaching.
• Adaptive mesocycle — the 5-week plan auto-adjusts intensity when HRV
drops, sleep dips, or weekly volume spikes.
• Every cardio session feeds the model. A 10k run fatigues quads,
hamstrings, calves and core — not just "cardio".

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LOG EVERYTHING
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• Fast workout logging with rest timer, superset support, and RPE
tracking.
• PR detection, volume trends, and per-exercise e1RM history.
• Activity log for running, cycling, climbing, swimming, rowing, HIIT —
all feed the recovery model.
• Bodyweight + alcohol tracking so weekend drinks actually show up in
Monday's readiness.

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WEARABLE INTEGRATION
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• Whoop — direct OAuth pulls HRV, recovery, sleep, and strain.
• Health Connect (Android) — sleep stages, HRV, resting heart rate,
weight. Works with Samsung Health, Oura, Garmin, Fitbit, Polar.
• Workouts are written back to Health Connect so every app on your
phone sees your training.

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BUILT ON PRINCIPLE
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• Free. No ads. No paywalls. No upsells.
• Your data is yours. We never sell it, share it with brokers, or train
AI models on it. Full export and account deletion from your profile.

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Whether you're prepping for your first Hyrox Open, chasing a CrossFit
Open scaled division, or just training hybrid because you refuse to
pick, STRN keeps you moving forward without breaking yourself.

Log your first workout. Watch the model learn your fatigue. Race
smarter.