Training Intelligence built into GymPsycho Pro.

What it is: Mechanical tension is the force generated by muscle fibers during contraction against resistance. Research by Schoenfeld (2010) established it as the primary mechanism for muscle growth.

How we use it: Training Intelligence prioritizes load progression and tracks your strength gains over time. The Weight Predictor suggests weights that maintain optimal mechanical tension — heavy enough to stimulate growth, but not so heavy that form breaks down.

The science: Studies show that 6-12 reps at 65-85% 1RM provide optimal mechanical tension for hypertrophy. Our algorithms respect these ranges while adapting to your individual response patterns.

What it is: The Stimulus-Recovery-Adaptation (SRA) curve describes how muscles respond to training stress. After a workout, performance temporarily drops (fatigue), then recovers, then supercompensates (adaptation).

How we use it: The Plateau Analyzer tracks your performance trends to detect when fatigue is accumulating faster than you can recover. Early warning signs include: stalled weights, declining rep performance, or increased perceived effort.

Deload principle: During a deload, volume decreases while intensity stays high. This is more effective than the common "light weight, high reps" approach. We reduce sets by 40-50% while maintaining working weights, allowing recovery without detraining.

What it is: Progressive overload means systematically increasing training demands over time. Without it, muscles have no reason to adapt. This principle has been validated in countless studies since the 1940s.

How we use it: The Weight Predictor doesn't just suggest "more weight." It analyzes your progression rate, identifies realistic next steps, and rounds to available plates. A 2.5kg jump might be perfect for bench press but too aggressive for lateral raises.

Conservative approach: We err on the side of sustainable progress. A 1-2% weekly increase in load is more effective long-term than aggressive jumps that lead to missed reps or injury.

The framework: Developed by Dr. Mike Israetel and Renaissance Periodization, this system defines three critical volume thresholds per muscle group:

• MEV (Minimum Effective Volume): The minimum sets/week needed to maintain muscle. Below this, you may lose gains.
• MAV (Maximum Adaptive Volume): The sweet spot where most growth happens. Typically 10-20 sets/week per muscle group.
• MRV (Maximum Recoverable Volume): The upper limit. Beyond this, fatigue outpaces recovery and progress stalls.

How we use it: The Volume Analyzer tracks your weekly sets per muscle group and visualizes where you fall in this spectrum. Training below MEV? Time to add volume. Approaching MRV? Consider a deload before pushing further.

Why it matters: Generic recommendations fail because everyone responds differently. Your genetics, training age, recovery capacity, stress levels, and nutrition all affect optimal training parameters.

How we use it: Training Intelligence learns from YOUR training history. After logging enough sessions, the system adapts its recommendations based on how YOU respond to different stimuli. Not averages from studies — your actual data.

No prescriptions: We provide intelligent suggestions, not commands. You know your body better than any algorithm. The system respects your expertise and gives you the final say.

What it is: Muscle Focus lets you set priorities for individual muscle groups (High, Normal, Low). This adjusts the volume target bands (MEV, MAV, MRV) by ±20% — respecting that athletes have different goals for different body parts.

Scientific basis: The ±20% modifier is grounded in inter-individual variability research (Hubal et al., 2005). Response to training varies widely between individuals. Muscle Focus lets you fine-tune within scientifically reasonable bounds.

How it works: Set a muscle to "High Priority" and its MAV range shifts up by 20%, meaning you can train it with more volume before hitting MRV. Set it to "Low Priority" and targets decrease, allowing you to maintain with less effort while focusing recovery elsewhere.

GymPsycho philosophy: Priority is a modifier, never a command. The data remains source of truth — Muscle Focus just shifts the target zones based on your personal training goals.