I spent three months convinced my living room was too small for serious strength training. Then I watched my neighbor — a competitive powerlifter who trains in a studio apartment — casually fold up his weight bench and slide it under his bed after a full chest session. That moment changed how I thought about home fitness forever. An adjustable weight bench is the single most underrated piece of home gym equipment you can own. It unlocks dozens of exercises that floor-based workouts simply can’t replicate, from incline dumbbell presses to decline sit-ups to seated shoulder work. And the best…