Progressing Cardio Training

Cardio progression applies progressive overload (see Principle of Progressive Overload) to the FITT-VP variables (see FITT-VP Applied to Cardio). The general sequence ACSM and the conditioning guidelines describe is to increase volume before intensity: first build frequency and duration to a comfortable base, then add intensity.

Practical guidance:

• Change one variable at a time (frequency, then time, then intensity) so adaptation and tolerance can be judged.
• Small increments. A widely cited rule of thumb is to increase weekly training load (e.g., running mileage) by no more than about 10% per week to limit overuse-injury risk — a practical heuristic rather than a strict law.
• Three progression stages (ACSM): an initial conditioning stage (lower intensity, shorter sessions), an improvement stage (steeper progression toward goals), and a maintenance stage (holding the achieved level).
• First 6–8 weeks: the most significant conditioning effects typically appear early (see Rate of Progression and the Training Effect).
• Build in recovery. Periodic easier weeks/deloads prevent the progression from tipping into overreaching (see Deload Weeks and Warning Signs of Under-Recovery).

Progression should respect the chosen training-intensity distribution — adding volume mostly to easy work and intensity in small, controlled doses (see Training-Intensity Distribution (Polarized / Threshold / Pyramidal)).

• Increase volume (frequency, duration) before intensity; change one variable at a time.
• ~10%-per-week load-increase rule of thumb to limit overuse injury.
• ACSM stages: initial conditioning → improvement → maintenance.
• Largest conditioning effects usually in the first 6–8 weeks.
• Include deloads/easy weeks to avoid overreaching.