Make them a piece of the puzzle, but not the main focus of your workouts. (theathleticbuild.com)
Then, center the entire focus of your workout program around «beating the logbook» by either adding extra weight to the bar on the following workout (usually 5 - 10 pounds for big compound lifts and 2.5 - 5 pounds for smaller isolation lifts) or squeezing out a few extra reps with the same weight (while staying in that 5 - 12 rep range). (seannal.com)
How am I training for half marathons while still keeping my strength training going strong and the central focus of my workout program? (liftingrevolution.com)