Procedure

1. Assess Baseline and Equipment: Determine the user's available equipment and current strength levels using get_user_preferences and get_user_history to ensure appropriate compound movement selection.
2. Structure the "Posture-First" Warm-up: Dedicate the first 3 minutes to dynamic mobility. Use add_exercise to include:
   • Thoracic spine rotations.
   • Cat-cow transitions.
   • Activation for postural muscles (e.g., glute bridges or bird-dogs).
3. Design the High-Density Circuit: Create a 15-minute main block using a Hybrid High-Intensity Resistance Training (HIRT) model with create_workout.
   • Movement Selection: Use find_exercise_candidates to select exercises that provide multi-goal synergy:
     • Posture & Hypertrophy: Prioritize a 2:1 pulling-to-pushing ratio (Rows, Face Pulls).
     • Hypertrophy & Core: Movement patterns like Goblet Squats or Overhead Presses.
     • Core Strength: Focus on anti-rotation/anti-extension (Plank walk-outs, Deadbugs).
     • Weight Loss: High metabolic cost movements (Kettlebell swings, Thrusters).
4. Apply Peripheral Heart Action (PHA): Organize the circuit to pair upper-body movements with lower-body movements to increase cardiovascular demand and caloric expenditure.
5. Set Intensity and Rest:
   • Assign rest intervals between 30–60 seconds to maintain metabolic stress.
   • Prescribe a Rate of Perceived Exertion (RPE) of 8–9 for hypertrophy movements.
   • Use compute_one_rep_max if necessary to set initial loading based on history.
6. Implement Progressive Overload: In the workout notes or via remember, document the requirement to increase weight, increase reps, or decrease rest in subsequent sessions to prevent adaptation plateaus.
7. Final Review: Ensure the total duration estimate is exactly 20 minutes including the warm-up, prioritizing compound movements over isolation to maximize time density.