Most T Nation coaches agree that the standard plank doesn't do much for you once you can hold it for 30 or 40 seconds. But here's a way to ramp it up.
Other than actually activating your core (and shooting for intensity over duration), the key to making planks not suck is to keep your mind busy, whether that's lifting limbs, walking around, or moving weights. So try this:
Dumbbell Pull-Across Plank
This exercise will hammer the trunk when you maintain a rigid plank. And once you've got that down, you can raise the difficulty by increasing the load or moving the weight in front of the hands.
Two of the hardest things about competing are sending in the entry fee for a competition and then not pulling out the last few weeks. Some of you don't compete and are just training for self-actualization, self-esteem, and to be healthier and more whole in your daily interactions in the journey we call a life experience.
Why are people listening to fat guys who squat 800 pounds but can barely move? The truth is, running (not jogging) has a host of benefits to the weight lifter.