Harder, bigger, faster, stronger… you could easily count these as typical fitness goals. But how do you work on growing your muscles while also managing to build your stamina and endurance? Finding a balance between the two can be difficult — but it’s certainly not impossible.   One of the most common concerns is that, by focusing on both strength and endurance, you’re diluting your ability to excel at either. While this is a valid concern, plenty of recent research has suggested that concurrent training regimes (i.e, those that involve…