{"zones":[{"zone":"Zone 1 (Recovery)","hr_range":"< 110 bpm","rpe_range":"Very light, easy breathing"},{"zone":"Zone 2 (Aerobic Base)","hr_range":"110-128 bpm","rpe_range":"Conversational, easy effort (aim for ~123 bpm)"},{"zone":"Zone 3 (Aerobic Power)","hr_range":"129-145 bpm","rpe_range":"Moderate, can speak in short sentences"},{"zone":"Strength Training","hr_range":"N/A","rpe_range":"RPE 6-7 (moderate effort)"}],"weekly_plan":[{"week":"Week 1: Re-introduction & Strict Z2","dates":"May 31 - June 6, 2026","days":[{"day_date":"Sun, May 31","focus":"Recovery","workout":"Rest or 30' Easy Walk Z1","purpose":"Allow full recovery after high freshness and previous detraining state.","adaptation":"If feeling tired, prioritize complete rest. If rested, enjoy a relaxed walk."}]},{"day_date":"Mon, Jun 1","focus":"Aerobic Base","workout":"40' Outdoor Walk-Run Z2 (e.g., 3' walk, 1' run; adjust as needed to keep HR in Z2)","purpose":"Re-introduce outdoor running with strict HR control via walk-run intervals.","adaptation":"If HR spikes, extend walk segments or reduce run duration. Focus on perceived easy effort."}]},{"day_date":"Tue, Jun 2","focus":"Strength","workout":"45' General Strength: Full Body (2-3 sets, 10-12 reps, RPE 6-7). Focus on form and controlled movements.","purpose":"Build foundational strength and support joint health.","adaptation":"If fatigued, reduce sets/reps or opt for bodyweight exercises only. Prioritize perfect form over weight."}]},{"day_date":"Wed, Jun 3","focus":"Aerobic Base","workout":"45' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Reinforce strict Zone 2 adherence in a controlled environment.","adaptation":"If HR drifts, slow pace immediately. If feeling tired, reduce duration to 30'."}]},{"day_date":"Thu, Jun 4","focus":"Active Recovery","workout":"30' Easy Cycle Z1 or Mobility & Stretching","purpose":"Aid recovery and improve flexibility without adding significant stress.","adaptation":"If very stiff, focus on gentle stretching. If rested, enjoy a light cycle."}]},{"day_date":"Fri, Jun 5","focus":"Strength","workout":"45' General Strength: Full Body (2-3 sets, 10-12 reps, RPE 6-7). Focus on form and controlled movements.","purpose":"Maintain strength stimulus and support muscle maintenance.","adaptation":"If fatigued, reduce sets/reps or focus on core work only. Ensure full recovery from Tuesday's session."}]},{"day_date":"Sat, Jun 6","focus":"Aerobic Base","workout":"50' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Build sustained aerobic endurance in a controlled, low-impact setting.","adaptation":"If HR drifts, slow pace immediately. If feeling tired, reduce duration to 40'."}]}]},{"week":"Week 2: Gentle Progression","dates":"June 7 - June 13, 2026","days":[{"day_date":"Sun, Jun 7","focus":"Recovery","workout":"Rest or 30' Easy Walk Z1","purpose":"Ensure adequate recovery before the next training block.","adaptation":"Prioritize rest if any signs of fatigue are present."}]},{"day_date":"Mon, Jun 8","focus":"Aerobic Base","workout":"45' Outdoor Walk-Run Z2 (e.g., 2' walk, 1' run; adjust as needed to keep HR in Z2)","purpose":"Progress outdoor aerobic capacity while maintaining strict HR control.","adaptation":"If HR spikes, revert to previous week's walk-run ratio or extend walk segments."}]},{"day_date":"Tue, Jun 9","focus":"Strength","workout":"50' General Strength: Full Body (3 sets, 10-12 reps, RPE 6-7). Focus on progressive overload (e.g., slightly more weight/reps if form is perfect).
","purpose":"Continue building strength and resilience with a slight increase in load.","adaptation":"If not fully recovered, reduce volume or intensity. Focus on consistent form."}]},{"day_date":"Wed, Jun 10","focus":"Aerobic Base","workout":"50' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Extend duration of controlled Zone 2 work.","adaptation":"If HR drifts, slow pace. If feeling tired, reduce duration to 40'."}]},{"day_date":"Thu, Jun 11","focus":"Active Recovery","workout":"30' Easy Walk Z1 or light Mobility & Stretching","purpose":"Promote active recovery and maintain flexibility.","adaptation":"If muscles are sore, focus on gentle movement and stretching."}]},{"day_date":"Fri, Jun 12","focus":"Strength","workout":"50' General Strength: Full Body (3 sets, 10-12 reps, RPE 6-7). Focus on progressive overload.","purpose":"Consolidate strength gains and prepare for weekend aerobic session.","adaptation":"If fatigued, reduce sets/reps. Ensure proper warm-up and cool-down."}]},{"day_date":"Sat, Jun 13","focus":"Aerobic Base","workout":"60' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Further develop sustained aerobic endurance and mental fortitude.","adaptation":"If HR drifts, slow pace. If feeling significantly tired, reduce duration to 50'."}]}]},{"week":"Week 3: Build Aerobic Base","dates":"June 14 - June 20, 2026","days":[{"day_date":"Sun, Jun 14","focus":"Recovery","workout":"Rest or 30' Easy Walk Z1","purpose":"Allow for full physiological recovery from the week's training.","adaptation":"Prioritize complete rest if any signs of fatigue are present."}]},{"day_date":"Mon, Jun 15","focus":"Aerobic Base","workout":"50' Outdoor Walk-Run Z2 (e.g., 2' walk, 2' run; adjust as needed to keep HR in Z2)","purpose":"Increase continuous running time outdoors while maintaining Zone 2 discipline.","adaptation":"If HR spikes, revert to previous week's walk-run ratio or extend walk segments."}]},{"day_date":"Tue, Jun 16","focus":"Strength","workout":"50' General Strength: Full Body (3 sets, 8-10 reps, RPE 7). Focus on slightly heavier load if form is perfect.","purpose":"Continue to build strength with a slightly higher intensity stimulus.","adaptation":"If not fully recovered, maintain previous week's load. Focus on controlled movements."}]},{"day_date":"Wed, Jun 17","focus":"Aerobic Base","workout":"55' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Slightly increase duration of controlled Zone 2 work.","adaptation":"If HR drifts, slow pace. If feeling tired, reduce duration to 45'."}]},{"day_date":"Thu, Jun 18","focus":"Active Recovery","workout":"30' Easy Cycle Z1 or Mobility & Stretching","purpose":"Aid recovery and maintain flexibility.","adaptation":"If muscles are sore, focus on gentle movement and stretching."}]},{"day_date":"Fri, Jun 19","focus":"Strength","workout":"50' General Strength: Full Body (3 sets, 8-10 reps, RPE 7). Focus on slightly heavier load.","purpose":"Consolidate strength gains and prepare for weekend aerobic session.","adaptation":"If fatigued, reduce sets/reps. Ensure proper warm-up and cool-down."}]},{"day_date":"Sat, Jun 20","focus":"Aerobic Base","workout":"70' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Longest aerobic base session of the block to build significant endurance.","adaptation":"If HR drifts, slow pace. If feeling significantly tired, reduce duration to 60'."}]}]},{"week":"Week 4: Recovery/Deload","dates":"June 21 - June 27, 2026","days":[{"day_date":"Sun, Jun 21","focus":"Recovery","workout":"Rest or 30' Easy Walk Z1","purpose":"Allow for deep recovery before the next training cycle.","adaptation":"Prioritize complete rest if any signs of fatigue are present."}]},{"day_date":"Mon, Jun 22","focus":"Aerobic Base","workout":"30' Outdoor Walk-Run Z2 (e.g., 3' walk, 1' run)","purpose":"Maintain light aerobic stimulus while prioritizing recovery.","adaptation":"If HR spikes, extend walk segments or reduce run duration. Focus on perceived easy effort."}]},{"day_date":"Tue, Jun 23","focus":"Strength (Light)","workout":"30' Light General Strength: Full Body (2 sets, 12-15 reps, RPE 5-6). Focus on perfect form and mobility.","purpose":"Maintain muscle tone and mobility without adding significant stress.","adaptation":"If fatigued, reduce sets/reps or opt for bodyweight exercises only. Focus on perfect form."}]},{"day_date":"Wed, Jun 24","focus":"Aerobic Base","workout":"35' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Maintain controlled Zone 2 work at a reduced duration.","adaptation":"If HR drifts, slow pace. If feeling tired, reduce duration to 25'."}]},{"day_date":"Thu, Jun 25","focus":"Active Recovery","workout":"30' Easy Walk Z1 or light Mobility & Stretching","purpose":"Promote active recovery and mental freshness.","adaptation":"If muscles are sore, focus on gentle movement and stretching."}]},{"day_date":"Fri, Jun 26","focus":"Strength (Light)","workout":"30' Light General Strength: Full Body (2 sets, 12-15 reps, RPE 5-6). Focus on perfect form and mobility.","purpose":"Maintain muscle tone and mobility without adding significant stress.","adaptation":"If fatigued, reduce sets/reps or opt for bodyweight exercises only. Focus on perfect form."}]},{"day_date":"Sat, Jun 27","focus":"Aerobic Base","workout":"40' Treadmill Run Z2 (maintain ~10:28/km pace or slower to keep HR ~123 bpm)","purpose":"Final light aerobic session of the deload week to maintain consistency.","adaptation":"If HR drifts, slow pace. If feeling significantly tired, reduce duration to 30'."}]}]}