Connor Crompton - Online Coach on Instagram: "5 Of The Worst Times To Do Cardio When Building Muscle Cardio isn’t the enemy — bad timing is. If your goal is to build muscle, doing cardio at the wrong time can quietly sabotage your progress without you realising it. Avoid cardio at these times 👇 1️⃣ Before heavy leg days You’re pre-fatiguing the exact muscles you need to perform. Less load, worse reps, weaker stimulus. 2️⃣ Immediately post-lift, every session Occasional cardio after training is