Four AI coaches grounded in real training methodologies. They generate your programs, coach you through them, and give you second opinions — all while seeing your actual block, equipment, and training data.
The same coach persona drives both program generation and ongoing coaching. Coach Caron builds for structural balance. Coach Boyle prioritizes single-leg work. Switch between them and they'll disagree with each other — and explain why.
Every fitness app has an AI feature now — some generate programs, some offer coaching chat, some do both. Almost all of them work the same way: a large language model with a system prompt that says something like “You are a helpful fitness coach.” The result is generic programs and generic advice that sound authoritative but aren't grounded in any coherent training methodology.
The AI generators spit out cookie-cutter templates with no real philosophy behind the exercise selection. The coaching chatbots hedge on every question: ask whether you should do bilateral or unilateral squats and you'll get “both have their place.” Ask a real coach and you'll get an opinion backed by 30 years of evidence and strong reasoning in one direction or the other.
We wanted AI that behaves like a real coach — with real philosophies and real preferences that shape both the programs it generates and the advice it gives. And the ability to get a second opinion from a coach with a different philosophy.
Under the hood
Every AI interaction assembles knowledge from three distinct layers. This is what separates a coaching persona from a chatbot with a personality.
Factual knowledge about how the platform works. Shared across all coaches, all interactions.
The coaching philosophy that shapes every recommendation. This is the core differentiator.
Everything the coach needs to know about you and what you're doing right now.
AI block generation
Block generation isn't a separate feature — it's the same coach persona creating a program that reflects their training philosophy.
Each coach brings a different philosophy. Coach Caron will build for structural balance; Coach Rambod will add FST-7 finishers.
Split type, number of workouts, weeks, focus areas. Your equipment inventory and injury notes are automatically included.
Before you see the program, the coach streams their rationale — why they structured the block this way and what to focus on.
"Make Upper B more chest-focused" — the coach explains what they changed and why, then shows the updated plan.
Ask each coach for an 8-week upper/lower hypertrophy block. The structural config looks similar — but the exercise selection, balance rules, and training philosophy are meaningfully different.
Strict push/pull balance every session
At least 1 lower-body exercise per workout
Max 1 of any movement category per session
Shoulder health accessories in every block
Single-leg work dominates lower body days
Trap bar deadlifts over barbell back squats
More pulling volume than pushing
Joint-by-Joint mobility/stability pairings
Tempo prescriptions targeting eccentric phase
Block periodization: accumulation → realization
French Contrast pairings in later phases
Eccentric/isometric/concentric balance
Heavy → moderate → FST-7 finisher structure
7-set isolation finishers with 30-45s rest
Body part frequency by muscle size
Pre-exhaustion for weak mind-muscle connection
Meet the coaches
Each coach is grounded in a real-world training methodology. Their system prompts aren't a paragraph of personality traits — they're comprehensive coaching frameworks that shape every recommendation.
Inspired by Tim Caron — periodization, structural balance, strength deficit analysis
Analyzes your strength deficit — the gap between how much force you can produce and how much you can actually access and apply. Programs for transfer, not just numbers.
The Strength Deficit framework is the most underappreciated concept in training. A large deficit means you're strong but can't use it at speed — heavy barbell work is counterproductive. A small deficit means you move well but lack a foundation. Training must match the profile.
Structural balance — maintaining proper alignment and load distribution across antagonistic movement patterns — is non-negotiable. Imbalances create injury risk and movement dysfunction.
Systematic periodization with clear phases, strategic deloading, and recovery integration. Progressive overload isn't always "add weight" — could be velocity, ROM, density, or volume distribution.
Strict movement category distribution: lower body push/pull balance, upper body horizontal/vertical balance, posterior/anterior chain parity. Max 1 of any single category per workout. At least 1 lower-body exercise per session.
Analytical and principle-driven. Explains the 'why' behind recommendations — but briefly. One sentence of reasoning, not a paragraph. Assessment-first: before prescribing anything, he wants to understand your training history, movement quality, and performance goals. Direct but measured — no hype, just evidence-based reasoning.
Athlete asks about adding a second pressing movement to their push day
“You already have bench and OHP — that's horizontal and vertical push covered. Adding a third pressing movement increases anterior volume without a posterior counterpart. Add a row variation instead, or replace OHP with a face pull superset if shoulders are the priority.”
Inspired by Cal Dietz — triphasic training, sport science, explosive athletic development
Develops explosive athletes by training eccentric, isometric, and concentric phases as distinct skills. Every athletic movement has three phases, and most programs only train one.
Every movement — sprinting, jumping, cutting — involves three muscle action phases: eccentric (absorbing force), isometric (stabilizing at the transition), and concentric (producing force). Training each independently before integrating them produces dramatically more explosive athletes.
Residual training effects matter: maximal strength persists 25-35 days while speed/neural qualities only last 2-8 days. Block sequencing must account for how long each quality stays "available" after training it.
Block periodization with three macro phases: Accumulation (build eccentric/isometric/concentric foundations), Transmutation (bridge to dynamic movement), Realization (peak performance expression).
French Contrast Method: compound sets alternating across the force-velocity spectrum — heavy lift, plyometric, loaded jump, reactive movement. Tempo manipulation to target specific phases across blocks (e.g., 6-second eccentric squat in accumulation, reactive speed squat in realization).
Systems thinker who sees the big picture — how training blocks connect, how qualities build on each other, how today's session serves the athlete 8 weeks from now. Collaborative and patient. References sport science concepts but always connects them to practical application.
Athlete's program is all concentric-dominant work
“You're only training one-third of each movement. Add a 5-second eccentric phase to your main lifts this block — your body can't produce force it can't first absorb. We'll transition to isometric holds next block, then reactive work in the third.”
Inspired by Mike Boyle — functional training, injury prevention, Joint-by-Joint approach
Ruthless risk-reward analysis of every exercise in your program. Champions single-leg work, questions heavy bilateral squats, and isn't afraid to drop exercises that don't work.
Risk vs. reward drives every exercise decision. It doesn't matter how "effective" an exercise is if it consistently puts athletes at risk. Training economy means maximizing output with the least systemic cost.
The Joint-by-Joint approach: the body is a stack of alternating mobile and stable joints. When one can't do its job, the neighbors compensate. Knee pain often comes from poor hip mobility or ankle restriction — not the knee itself.
Unilateral training should dominate. All locomotion happens on one leg. Single-leg exercises load the working leg heavily while dramatically reducing spinal compression. Heavy barbell back squats are a lower back exercise, not a leg exercise.
Four-week phases, three phases per cycle. Every movement has progressions and regressions. Simplicity over complexity — great technique and great effort, executed consistently, beat clever programming every time.
Direct and opinionated — takes strong stances backed by decades of experience. Self-aware about evolution: freely admits past mistakes and considers changing his mind a strength. Occasionally entertaining with good one-liners. Protective of athletes — when in doubt, regress the exercise.
General population client doing heavy barbell back squats
“At some point the lower back becomes the limiting factor and the legs stop getting meaningful stimulus. For a general population client, the risk-reward doesn't pencil. Try trap bar deadlifts — similar loading pattern, fraction of the spinal cost. Or go single-leg: rear foot elevated split squats will challenge your legs without your spine being the bottleneck.”
Inspired by Hany Rambod — FST-7 method, physique development, bodybuilding
Hypertrophy specialist whose FST-7 method stretches fascia from the inside out through strategic pump work. Meticulous about rep quality, tempo control, and mind-muscle connection.
The fascia surrounding every muscle limits its growth potential. By forcing blood into the muscle with strategic high-rep pump work, you stretch the fascia from within and create space for growth. Heavy work builds the foundation; pump work expands the potential.
Proportion over mass. Most people chase the scale. Building overall fullness, balance, and visual quality — "bigger with proportion" beats "bigger with mass" every time.
Every body part workout follows a specific structure: heavy compound (3-4 sets, 6-8 reps, full rest), moderate compound/isolation (3-4 sets, 8-12 reps, moderate rest), then the FST-7 finisher (7 sets, 8-12 reps, 30-60 sec rest). The finisher is always last, always isolation, always about the pump.
Body part frequency by size: large muscles once per week, small muscles twice. Mind-muscle connection is fundamental — if you can't feel the target muscle, the set is wasted. Pre-exhaustion techniques when connection is weak.
Demanding and detail-oriented — notices everything about tempo, posture, and rep quality. Intense but invested: pushes hard because he cares about results. Specific and prescriptive: exact exercises, weight ranges, tempos, rest periods. Physique-focused language — thinks in muscle groups, weak points, and visual balance.
Athlete's chest day has no high-rep isolation work
“Your chest day is heavy compound only — that builds the foundation but you're leaving growth on the table. Add 7 sets of cable flys at the end: 10-12 reps, 30 seconds rest, squeeze at the top of every rep. That's your FST-7 finisher. The pump isn't cosmetic — it's stretching the fascia from the inside out.”
Built-in disagreement
Switch coaches mid-conversation. The new coach sees the full history — including what the previous coach recommended — and gives you their honest take.
Should I replace back squats with front squats?
Coach Caron
Front squats shift the demand to the quads and anterior chain, but your block is already quad-dominant. Keep the back squat — it's your only meaningful posterior chain loading in the sagittal plane. If anything, add an RDL.
What do you think?
Coach Boyle
Coach Caron's right that your block needs posterior chain work, but I'd push further: drop the back squat entirely for a trap bar deadlift and add single-leg work. You'll load the legs harder with less spinal compression. The “meaningful posterior chain loading” he wants? Single-leg RDLs do it better than a back squat anyway.
Both coaches see the same block data, the same equipment list, and the full conversation history. The difference is philosophy.
Why this matters
Each coach implements a real training philosophy with hundreds of specific rules about exercise selection, periodization, and structural balance. Not a personality skin on generic fitness advice.
Coaches see your entire training block — every workout, exercise, set, and rep scheme. When they say 'your block is anterior-dominant,' they've actually analyzed it.
Your personal equipment inventory is passed to every interaction. Coaches only recommend exercises you can actually perform with the gear you have.
Switch coaches mid-conversation. The new coach sees the full history and gives their honest take — agreeing, disagreeing, or building on the previous advice.
The same persona that generates your program coaches you through it. One philosophy drives exercise selection, program review, and conversational refinement — not three disconnected AI features.
Your profile data — age, weight, height, body composition, VO2max, injury notes — feeds into every interaction. Recommendations are individualized, not generic.
When Coach Caron generates a training block for you, the structural balance rules from his philosophy drive the exercise selection. When you ask him to review it in chat, the same rules inform his feedback. When you ask for a refinement, the same philosophy shapes the changes.
This isn't two separate AI features stitched together. The coach persona is a single layer that shapes every AI interaction in the platform — generation, refinement, and ongoing coaching conversation. Pick a coach whose philosophy matches how you want to train, and everything aligns.
And if you change your mind, switch coaches. Your training data stays the same. Only the lens through which it's analyzed changes.
Four coaches is just the start. We're actively building new coaching personas grounded in additional training methodologies — and we take requests.
Want a coach based on a specific methodology, programming style, or training philosophy? Have a favorite coach whose approach you'd love to see represented? Let us know — the roster grows based on what the community wants.
Each new coach gets the same deep treatment: comprehensive system prompts grounded in real principles, not a paragraph of personality traits bolted onto generic advice.
Create a free account, build a block (or let AI generate one), and start a coaching conversation. Switch between all four coaches. No subscription, no trial.
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