Your Aerobic Foundation
This guide builds cardiovascular fitness, improves flexibility, and develops functional mobility — the three physical capacities that directly support and amplify every other form of training you do.
Cardiovascular fitness and mobility are not accessories to training — they are foundational. Without an adequate aerobic base, recovery between sets is slower, fatigue accumulates faster, and performance degrades earlier in each session. Without adequate mobility, movement quality deteriorates and injury risk increases across all training modalities.
This guide is designed to be used alongside any PROSPER strength programme. The cardio sessions are scheduled to complement — not compete with — your resistance training. The stretching and mobility work is structured to address the most common restriction patterns in trained athletes.
8-Week Road Map
Two distinct phases — the first builds aerobic base through low-intensity steady-state work and fundamental mobility. The second introduces higher intensity intervals and advanced flexibility protocols.
Build the aerobic foundation using exclusively low-intensity steady-state cardio. Maintain Zone 2 heart rate (60–70% max HR) for the entire session. Simultaneously, establish a daily 15-minute mobility routine targeting the hip flexors, thoracic spine, and shoulder complex — the three most common restriction points in strength athletes.
Introduce HIIT protocol twice per week alongside continued LISS sessions. HIIT improves VO2 max and metabolic conditioning. The stretching routine evolves to include deeper passive holds, PNF stretching techniques, and a yoga-inspired full-body flow for rest day use.
Cardio Protocols
Two primary modalities are used: LISS (Low Intensity Steady State) and HIIT (High Intensity Interval Training). Each serves a distinct physiological purpose and both are necessary for complete cardiovascular development.
| Week | LISS Sessions | HIIT Sessions | LISS Duration | Zone |
|---|---|---|---|---|
| Week 1–2 | 4× per week | None | 25 min | Zone 2 — RPE 4–5 |
| Week 3–4 | 4× per week | None | 35 min | Zone 2 — RPE 5 |
| Week 5–6 | 3× per week | 2× per week | 30 min | Zone 2–3 / Zone 4–5 |
| Week 7–8 | 3× per week | 2× per week | 35 min | Zone 2–3 / Zone 4–5 |
Maintain 60–70% of maximum heart rate for the entire session. Preferred modalities: incline treadmill walk, outdoor walk, cycling, elliptical. You should be able to hold a full conversation throughout. If you cannot, slow down.
40 seconds of maximum effort followed by 80 seconds of active recovery. 8–10 rounds total. Best performed on assault bike or rowing machine. RPE 8–9 during work intervals. Full recovery before the next round.
| Goal | Best Modality | Why |
|---|---|---|
| Aerobic base building | Walking, cycling, elliptical | Low impact, sustainable, easy to maintain Zone 2 |
| Fat loss | Incline treadmill, cycling | Higher caloric expenditure without joint stress |
| VO2 max improvement | Assault bike, rowing, sprints | Full-body engagement, maximum metabolic demand |
| Recovery / active rest | Walking, swimming | Blood flow without adding fatigue |
Functional Mobility Routines
Mobility is the active capacity to move through a range of motion. It is different from flexibility (passive range). Mobility training improves movement quality, reduces injury risk, and directly enhances performance in strength training.
| Movement | Duration / Reps | Target Area |
|---|---|---|
| Hip 90/90 Stretch | 60s each position | Hip external and internal rotation |
| World's Greatest Stretch | 5 each side | Full lower body and thoracic |
| Thoracic Rotation | 8 each side | Thoracic spine mobility |
| Cat-Cow | 10 full cycles | Spinal flexion and extension |
| Shoulder Circles | 10 each direction | Shoulder joint capsule |
| Ankle Circle | 10 each direction per foot | Ankle dorsiflexion |
| Movement | Duration / Reps | Target Area |
|---|---|---|
| Deep Lunge Flow | 8 each side — slow and controlled | Hip flexors, adductors, thoracic |
| Hip 90/90 Active Rotations | 10 rotations each side | Hip internal rotation priority |
| Scapular Wall Slides | 2 × 10 reps | Scapular upward rotation |
| Cossack Squat | 5 each side | Hip and ankle mobility combined |
| Thoracic Bridge | 5 reps — slow transition | Thoracic extension and shoulder |
| Loaded Beast to Child's Pose | 8 full cycles | Full anterior chain opening |
Stretching Protocols
Static stretching is performed after training or in dedicated flexibility sessions — never as a warm-up. Hold all stretches for a minimum of 45 seconds to achieve meaningful tissue change. Breathe steadily throughout.
| Stretch | Hold | Notes |
|---|---|---|
| Kneeling Hip Flexor Stretch | 60s each side | Tuck pelvis, lean forward slightly |
| Pigeon Pose | 90s each side | Glute and external rotator priority |
| Supine Hamstring Stretch | 60s each side | Flex foot, leg straight |
| Seated Adductor Stretch | 60s | Butterfly or straddle position |
| Doorway Chest Stretch | 45s each height | 90° and 135° arm positions |
| Thread the Needle | 45s each side | Thoracic rotation and lat release |
| Overhead Lat Stretch | 45s each side | Arm overhead, lean away |
| Child's Pose | 90s | Full spinal decompression finish |
| Muscle Group | Method | Duration |
|---|---|---|
| Hamstrings | Contract-relax: 6s contract, 30s passive hold | 3 rounds each side |
| Hip Flexors | Contract-relax: 6s contract, 45s passive hold | 3 rounds each side |
| Chest / Pecs | Contract-relax: 6s contract, 30s passive hold | 3 rounds each side |
| Lats | Contract-relax: 6s contract, 30s passive hold | 3 rounds each side |
Breathing Techniques
Controlled breathing directly influences heart rate, recovery speed, and stress response. These techniques are used between sets, during cool-downs, and as standalone recovery tools on rest days.
Inhale for 4 counts. Hold for 4 counts. Exhale for 4 counts. Hold for 4 counts. Repeat 4–6 cycles between heavy sets or post-HIIT to accelerate heart rate recovery and reset the nervous system.
Inhale for 4 counts. Hold for 7 counts. Exhale for 8 counts. Perform 4 cycles before sleep. Activates the parasympathetic nervous system and reduces cortisol — ideal for recovery nights after high-volume training.
Lie on your back, hand on belly. Breathe so the belly rises on inhale — not the chest. 5 minutes daily. This resets breathing mechanics after extended periods of thoracic breathing common in trained athletes.
Breathe exclusively through the nose during all Zone 2 LISS sessions. Nasal breathing filters, humidifies, and slows the breath — keeping you in the correct aerobic zone and improving CO2 tolerance over time.
Sample Weekly Layout
This schedule is designed as a standalone programme. If used alongside a PROSPER strength programme, adjust cardio session timing so it follows strength training or is performed on separate days.
Phase 1 — Weeks 1–4
Phase 2 — Weeks 5–8
Measuring Cardio & Flexibility Progress
Cardiovascular and mobility progress is measured differently from strength. These metrics track the changes most relevant to aerobic fitness and flexibility development over 8 weeks.
Weekly morning measurement. A declining resting HR over 8 weeks indicates improving cardiovascular fitness. Target: decrease by 3–8 bpm.
How fast your HR drops in the 60 seconds after a HIIT interval. Improving recovery HR = improving cardiovascular fitness.
Monthly sit-and-reach test. Also measure hip internal rotation (floor test) and shoulder reach-back. Progress photos of key positions.
Video your squat, hinge, and overhead press at the start of Week 1 and Week 8. The difference in movement quality is the real result of this program.
"Take care of your body. It's the only place you have to live."