HIIT vs steady state cardio

{{whyLabel}}: High-intensity training puts significant strain on the cardiovascular system and joints, making a professional clearance essential for safety.

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• Contact your general practitioner for a sports physical.
• Discuss any history of heart palpitations, joint pain, or metabolic issues.
• Request a resting ECG if you are over 40 or have a sedentary lifestyle.

{{doneWhenLabel}}: You have received medical clearance to perform high-intensity exercise.

{{whyLabel}}: Precise intensity is the only way to distinguish between HIIT and Steady-State (LISS) effectively.

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• Determine your Resting Heart Rate (RHR) upon waking.
• Use the Karvonen Formula: Target HR = ((Max HR − RHR) × %Intensity) + RHR.
• Estimate Max HR as 220 minus your age.
• Define Zone 2 (LISS) as 60-70% and HIIT intervals as 85-95% of Max HR.

{{doneWhenLabel}}: You have a written list of your specific BPM ranges for Zone 2 and HIIT.

{{whyLabel}}: To measure your current aerobic capacity (VO2 max) and track future improvements.

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• Find a flat 400m running track or use a GPS-enabled watch.
• Warm up for 10 minutes with light jogging.
• Run as far as possible in exactly 12 minutes.
• Record the distance to calculate your estimated VO2 max.

{{doneWhenLabel}}: You have recorded your baseline distance in meters.

{{whyLabel}}: LISS strengthens the heart's stroke volume and increases mitochondrial density in slow-twitch muscle fibers, which is the foundation for all fitness.

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• Choose a low-impact activity like brisk walking, cycling, or swimming.
• Maintain a steady pace where you can still hold a conversation (the 'talk test').
• Keep your heart rate strictly within the 60-70% range calculated earlier.

{{doneWhenLabel}}: You have finished 45 minutes of continuous movement within Zone 2.

{{whyLabel}}: Nasal breathing improves CO2 tolerance and ensures you stay in the aerobic zone, preventing 'intensity creep' during LISS.

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• During your next LISS session, keep your mouth closed.
• Inhale and exhale only through the nose.
• If you feel the need to gasp for air, slow down your pace immediately.

{{doneWhenLabel}}: You can complete a full 30-minute session using only nasal breathing.

{{whyLabel}}: The 4x4 method (4 mins high, 3 mins low) is scientifically proven to be one of the most effective ways to improve heart health and VO2 max.

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• Warm up for 10 minutes.
• Perform 4 minutes at 85-95% Max HR (very hard effort).
• Follow with 3 minutes of active recovery (light walking/pedaling).
• Repeat for a total of 4 intervals.

{{doneWhenLabel}}: You have completed 4 high-intensity intervals with proper recovery.

{{whyLabel}}: Tabata (20s work / 10s rest) maximizes the 'afterburn' effect (EPOC), increasing calorie burn for up to 24 hours post-workout.

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• Choose a full-body movement like burpees or mountain climbers.
• Go 100% max effort for 20 seconds.
• Rest for 10 seconds.
• Repeat for 8 rounds (4 minutes total).

{{doneWhenLabel}}: You have completed all 8 rounds at maximum possible intensity.

{{whyLabel}}: Research shows that doing 80% low-intensity and 20% high-intensity work provides the best results for both weight loss and longevity without burnout.

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• Schedule 2-3 LISS sessions (45-60 mins) per week.
• Schedule 1-2 HIIT sessions (20-30 mins) per week.
• Ensure at least 48 hours of rest or light walking between HIIT sessions.

{{doneWhenLabel}}: You have a written weekly calendar following the 80/20 rule.

{{whyLabel}}: To validate the effectiveness of the hybrid approach and adjust intensity for progressive overload.

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• Repeat the 12-minute Cooper Test after 6 weeks of the routine.
• Measure waist circumference or body fat percentage.
• Compare results to your baseline assessment.

{{doneWhenLabel}}: You have documented your 6-week progress markers.