I'm trying to find the motivation to lift 3 or 4 times per week
I do plenty of low level and high intensity cardio but generally lift only 1-2 times per week and remain built like a slightly muscular runner.
How many of you are actually lifting 3 or more days per week?
Would you say you actually individually train each upper body muscle - pectorals, biceps, abdominals, obliques, triceps, latissimus dorsi - 3 times a week? If so, that is 3 times more than I generally do..
I do deadlifts and squats but worry less about lower body because of all the running and occasional racquet sports. Can probably leave that at one session of deadlifts and one session of squats per week, but that other stuff I'm concerned about.
My gym is easy to get to so that is not really an excuse..
Sounds like you are already very active, with the running and racquet sports. This will already put strain on your legs, so I wouldn't see a reason to lift your legs more than one day a week with this schedule. Add to it, depending on your age, I wouldn't see a need to lift more than three times a week. Everyone is different, but I have tried some new things that has greatly decreased by time lifting and I have grown, gotten better results, and feel a lot better. Granted, I am in my mid 40's, so, someone that is 23 will have more energy to put into weights that I have.
I work my second job with an athletic trainer. By athletic trainer, he trains high level athletes primarily, then will do personal training for the average joe as well. And for the high-level athletes, the typical "big three" power lifts are limited. A lot of the training is on one leg, twisting, plyometrics, "safe" explosion (kettle bells and medicine balls v. barbell), etc. My point being, there are many ways to train, but unless you are trying to compete in a power lifting contest, the path of doing super heavy lifts that put stress and compression on your spine, is not needed. Especially if you train your legs one at a time.
Here is what I am doing...
Sunday - Heavy legs. I do a heavy set of partial rep hex bar deadlifts. This keeps the weight off my spine, but forces my lower back and legs to drive the weight about half the distance. I am training for my vertical leap, so I need the most strength in this range. Outside of this one lift, this day starts with plyometrics/uphill sprints/max jumps, then the heavy deadlift. Then I do a full depth one leg split squat. A negative one leg 90 degree squat. A set of hamstrings, and finish out with calves and hip flexors.
Monday - no lifting
Tuesday - Pushing. I get this workout done in about 45 minutes, about half of that time is resting. I go to complete failure on bench (3 to 7 reps), then rest 30 seconds and go to complete failure on a set of flies. Rest a good 5 minutes or so, then I go to complete failure on close grip bench, followed by complete failure on some knee down pushups, followed by tri pushdowns. The last few reps I really focus on time under tension. When I am done, I am really done. Last, I do some anterior delts and then lateral delts, same fashion, complete burndown, focus on time under tension at the end.
Wednesday - Plyometrics/max jumps/uphill sprints
Thursday - Off
Friday - Pulling. I throw military on this day, same process as above, complete failure, drop the weight off, bar only, complete failure. Followed by wide grip pullups, 30 seconds, burn out with lat pull downs. Followed by back rows, same process. Reverse curls, same process. Curls, same process. Rear Delts and Lateral Delts, same process.
Later in the day I will run some flat sprints and do some max jumps
Saturday - Off
Since you run and play sports, and I don't, that would replace Wednesday and the Friday spirts/plyos/jumps. In this case, I would only be in the gym about 2 hours a week over three days.