Rhythm Ride: Interval Cycling for Phase 2 CR
Progressive interval cycling program for Phase 2 cardiac rehab, enhancing cardiovascular fitness through alternating effort and recovery sessions.

This program is designed for phase 2 (outpatient) cardiac rehab patients with a moderate-to-high functional level and low risk, ready for structured exercise. It emphasizes aerobic conditioning to improve cardiovascular endurance, using a stationary bike at an intermediate progression level. Delivered in an in-clinic/supervised CR setting, it serves adults (18-65), helping you boost stamina through interval cycling with alternating effort and recovery under supervision, preparing you for long-term fitness.
Exercise program details
Breakdown and suggested frequency
Workouts for Weeks 1-2
Gentle cycling intervals with varied efforts and recovery to build baseline endurance.
- Intensity: RPE: 11-13, HRR: 30-50%
- Frequency: 3-5 sessions/week
- Duration: 30-40 min
Workouts for Weeks 3-4
Moderate intervals with increased duration and intensity to enhance aerobic capacity.
- Intensity: RPE: 12-14, HRR: 40-60%, building to RPE: 12-15, HRR: 40-70%
- Frequency: 3-5 sessions/week
- Duration: 40-50 min
Workouts for Weeks 5-6
Higher intensity intervals with shorter recovery to build cardiovascular strength.
- Intensity: RPE: 13-15, HRR: 50-70%, building to RPE: 15-16, HRR: 50-80%
- Frequency: 3-5 sessions/week
- Duration: 50-60 min
Workouts for Weeks 7+
Sustained high-intensity intervals with balanced recovery to maintain aerobic fitness.
- Intensity: RPE: 13-16, HRR: 60-80%
- Frequency: 3-5 sessions/week
- Duration: 50-60 min
Design Rationale and Notes
- Target Intensity: Clinicians should use their clinical judgment when prescribing target intensity ranges and should have understanding of the following:
- RPE <12 is equivalent to < 40% HRR
- RPE 12-13 is equivalent to 40-59% HRR
- RPE 14-16 is equivalent to 60-80% HRR
- Alignment with AACVPR/ACSM Guidelines: This Phase 2 program starts with moderate-intensity intervals (RPE: 11-13, HRR: 30-50%) and progresses to higher intensity (RPE: 14-16, HRR: 60-80%), aligning with outpatient aerobic goals for moderate-to-high function. Frequency (3-5 sessions/week, favoring 3) and extended duration (30-60 min) support endurance gains, with 5-min warm-ups (RPE 10-11) and 5-min cool-downs (5 min cycling + 5 min stretching, RPE 10-11) meeting 5-10 min prep/recovery standards.
- Program Breakdown Adherence: Weeks 1-2 use steady continuous to gentle intervals (30-40 min), Weeks 3-4 increase duration/intensity (40-50min), Weeks 5-6 push sustained efforts (50-60min), and Weeks 7+ maintain high efforts (50-60min).
- Optimal Number of Workouts: Three workouts per block provide variety, with 5 elements (warm-up, two effort levels, cool-down, stretches) ensuring comprehensive engagement. Durations (30-60 min) and effort lengths align with intermediate Phase 2 expectations.
- Chad Glover, MS, ACSM-CEP, CCRP
- Claudia Giacalone, MS, ACSM-CEP, CCRP, ACSM-EIM 3
Disclaimer: Clinicians should review this program carefully to ensure its appropriateness and safety for each individual patient before assigning it.
Updated Apr 29, 2025
