Does cardio kill weight gain?
YES IT DOES!
Cardiopulmonary activities favor burning of calories and helps you in maintaining the caloric deficient stage, one must have in order to loose weight or fat whateva is your goal. However, if you are doing excessive cardio without restricting your diet you will either be at the same stage i.e. wont loose weight or may gain weight as well. Diet will be a crucial factor along with cardio as it indicates whether you are in caloric surplus or deficient.
According to recent studies, one should involve resistance training along with cardio for overall results. Lifting weights will not only provide you with strength but it helps in burning fat using it as a fuel for building muscles.
A 45 min. resistance training mixed with 15–25 mins of cardio has proven highly beneficial and has shown good results in people with excess weight problem. HIIT is an alternative for cardio as it is effective even if done only 5 mins (properly) , intensity is way higher then doing tredmill and its not boring as just running on a tredmill or cycling or a lousy crosswalker.
HOPE IT HELPS!