Whenever I don't have time to do a specific muscle at the gym, later that day I'll hop onto Youtube and follow an Anabolic Aliens 5 minute dumbell circuit. It's just a short workout isolating a muscle group. Are workouts this short worth my time? I actually sometimes get more sore the next day from these videos than my actual gym workout, but I'm not sure if this is a good way to gauge the quality of my muscle growth.
Thank you!