Is Cardio Affecting your muscle gainz? Today we put this to bed and give you recommendations on what is currently best. HIIT Cardio Affecting Muscle Gains This month we look at a meta-analysis (Meta-analysis is the statistical procedure for combining data from multiple studies.) on doing HIIT and strength training together. We find out if will it kill your gains?? The quick answer is yes if done close to each other, e.g within the same session. But, They looked at if we a