My "training" isn't about looking good; it's about job safety and avoiding injury. The most unconventional method that significantly improved my strength was a simple, functional drill I call The Single-Arm Shingle Carry.
The problem arose from necessity. The biggest physical challenge on a steep roof isn't the initial lift of the shingle bundle; it's holding that heavy weight steady while your feet are moving on an incline. I realized I needed to train the small, stabilizing muscles in my core and hips that maintain my balance and safety.
The approach I took was simple functional training. I take a bundle of shingles, hold it against one hip—the exact position I carry it up a ladder—and walk across uneven ground in my yard for a set time. This forces my non-dominant side and my core to compensate for the shifting weight, which directly simulates the physical demands of the job.
The result was immediate and surprising: unshakable stability and endurance on steep pitches. My advice is to stop training for a general sport. Instead, train for the specific, awkward, and demanding motions that your job requires, because that functional strength is the only thing that will keep you safe and efficient in the real world.