Will too much muscle slow you down if you're an endurance athlete

Yes, Even Slow-Twitchers Can Build Bigger Muscles

Does the Cardio 'Interference Effect' Really Slow Your Gains?

Is there any scientific evidence that a large amount of muscle mass is bad for endurance in combat sports? - Quora

Does having an extremely muscular physique decrease your stamina/endurance? - Quora

What is a muscle that when you see well developed, is a sign of a powerful and talented athlete? - Quora

Top 10 Muscular Endurance Exercises for Beastly Sets - Steel Supplements

Slow Reps vs. Fast Reps: Which Are More Effective?

Will getting into endurance athletics (long distance running) get me very lean? - Quora

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Maintain Your Muscle

3 Reasons Why You Should Be Taking Creatine As An Endurance Athlete – Blonyx