12-Week Training Programs to Build Strength, Muscle, and Athletic Performance
Simple, effective programs designed to help you get stronger, move better, and see real results
12-Week Hypertrophy, Strength & Power Program
This 12-week program is built on the NASM OPT model and takes you through three scientifically-structured phases designed to build muscle, develop maximal strength, and convert it all into explosive power.
Phase 3 – Hypertrophy (Weeks 1–4)
We start by building your foundation. Higher volume, moderate loads, and controlled tempos maximize muscle growth and prepare your body for the heavier work ahead.
Phase 4 – Max Strength (Weeks 5–8)
Now we load the bar. Low reps, heavy weight, and longer rest periods train your nervous system to produce maximum force and turn the muscle you built into real, usable strength.
Phase 5 – Power (Weeks 9–12)
The final phase pairs heavy strength work with explosive movements in contrast supersets — the most effective method for developing speed, power, and athletic performance.
What’s included:
4 training days per week (3 required + 1 optional)
Squat, Upper, and Hinge day structure every week
Optional Day 4 with arms, cardio, and mobility — tailored to each phase
Full coaching notes on every exercise
12-week progress tracker to log your lifts
Whether you’re chasing size, strength, or athleticism — this program delivers all three.
Coaching Packages
Meet Your Coach
I’m Sean Flahaven — a certified personal trainer, fitness educator, and creator behind FLAITHLETE. My background blends strength training, mobility, and movement mechanics with a deep focus on teaching. I’m not just here to give you a plan; I’m here to help you understand why things work so you can train with confidence for the rest of your life.
I’ve spent years building systems that are clean, intentional, and premium — from my coaching check-ins to my intake process to the way I teach movement. My goal is to make fitness simple, sustainable, and effective for real people with real lives.
Sean Flahaven
My Coaching Philosophy
I believe in training with purpose, not noise. No gimmicks, no hype, no shortcuts. Just clear programming, honest communication, and a focus on long-term progress. Every client gets structure, education, and accountability tailored to their lifestyle and goals.
I coach with a “teach-first” mindset. When you work with me, you’re not just following a plan — you’re learning how to move better, train smarter, and build habits that last.
What I Do
I help people:
• Build strength and muscle with clean, efficient programming
• Improve mobility and movement quality
• Train with better technique and body awareness
• Stay consistent with structure and accountability
• Understand the why behind their training
Whether you’re a beginner or experienced lifter, I meet you where you are and build a plan that fits your life, not the other way around.
Why I Built FLAITHLETE
FLAITHLETE is built on the idea that fitness should be clear, educational, and premium — not confusing or overwhelming. I wanted to create a coaching experience that feels intentional from the moment you land on the site to the moment you start your first session.
Everything I build — programs, videos, check-ins, systems — is designed to be clean, professional, and easy to follow. No fluff. No wasted time. Just real progress.
What You Can Expect Working With Me
• Clear communication
• Structured programming
• Honest feedback
• High standards
• A coach who actually cares about your progress
• A premium, organized coaching experience from start to finish
I’m here to help you train with purpose, move with confidence, and build a body that feels strong and capable.
12-Week Hypertrophy, Strength & Power Program
This 12-week program is built on the NASM OPT model and takes you through three scientifically-structured phases designed to build muscle, develop maximal strength, and convert it all into explosive power.
Phase 3 – Hypertrophy (Weeks 1–4)
We start by building your foundation. Higher volume, moderate loads, and controlled tempos maximize muscle growth and prepare your body for the heavier work ahead.
Phase 4 – Max Strength (Weeks 5–8)
Now we load the bar. Low reps, heavy weight, and longer rest periods train your nervous system to produce maximum force and turn the muscle you built into real, usable strength.
Phase 5 – Power (Weeks 9–12)
The final phase pairs heavy strength work with explosive movements in contrast supersets — the most effective method for developing speed, power, and athletic performance.
What’s included:
4 training days per week (3 required + 1 optional)
Squat, Upper, and Hinge day structure every week
Optional Day 4 with arms, cardio, and mobility — tailored to each phase
Full coaching notes on every exercise
12-week progress tracker to log your lifts
Whether you’re chasing size, strength, or athleticism — this program delivers all three.