Should I Do Cardio When Bulking?

When It Makes Sense

• Good fit: You have a well‑structured strength program, a moderate calorie surplus, and want to maintain cardiovascular health while gaining muscle.
• Good fit: You are prone to gaining excess fat during bulking and prefer low‑impact cardio (e.g., brisk walking or cycling) to keep body fat in check without sacrificing recovery.

When You Should Avoid It

• Warning sign: Your training volume is already high, you’re experiencing lingering fatigue, and you’re eating just enough calories to support growth – adding cardio may impede recovery.
• Warning sign: You have a medical condition that limits intense aerobic activity or you’re on medication that affects heart rate; consult a health professional first.

Pros and Cons

Pros

• Improves cardiovascular fitness, which can enhance overall health and work capacity for future training phases.
• Helps regulate body fat levels, making the post‑bulking cut phase easier and potentially preserving lean mass.

Cons

• Increases overall energy expenditure, meaning you may need to eat more to stay in a surplus, which can be challenging to track.
• Excessive cardio, especially at high intensities, can interfere with muscle recovery and blunt strength gains.

Decision Checklist

• Am I eating enough calories to cover both strength training and cardio without entering a deficit?
• Do I have sufficient recovery time (sleep, rest days) to handle the extra workload?
• Is my primary goal muscle mass, or am I equally concerned about cardiovascular health and body composition?

Alternatives to Consider

If cardio feels risky, consider low‑impact options like daily walking, short mobility circuits, or active recovery sessions that raise heart rate without the metabolic cost of longer runs. Another alternative is to schedule cardio on separate days from heavy lifting or to limit sessions to 10‑20 minutes of moderate intensity.

Final Recommendation

For most lifters, incorporating modest, low‑to‑moderate intensity cardio a few times per week while bulking can support heart health and body‑fat control without drastically hindering muscle growth—provided nutrition and recovery are adjusted accordingly. If you’re new to bulking, have a high training volume, or any health concerns, start with minimal cardio and consult a qualified fitness or medical professional before making changes.