I've recently added the McGill "Big 3" into my warmup. I do each of the three movements (curl up, bird-dog, side-plank) for 10 reps each for a 10 second hold. These, so far, are not difficult for me to do.
My question is, if the "Big 3" aren't challenging by themselves, should they be made challenging? In other words, if I can do these without much difficulty do I just count my blessings and move onto other workouts or should I look to increase sets/reps or add weight.
Context edit: I'm using the "Big 3" to help build mobility, core development and stabilization for [other training]. My goals are not related to these movements themselves but to use them to facilitate the [other training].