Some workouts leave you buzzing, muscles pumping, and energy on high. Others leave you wondering if you made any progress at all. The difference often comes down to more than just the weight on the ...

Building muscle depends on several factors and isn't something that'll happen overnight after just one workout.

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Whether you're new to working out, have taken a week (or six) off the gym, or have just been going extra hard during your sprint intervals, you've likely been greeted by an old friend: delayed-onset ...