Pin-loaded stations in gyms are strength training machines that use adjustable weight stacks connected to a pin for selecting resistance. Users insert the pin into the desired weight to customize their workout intensity. These machines provide a guided and stable workout, targeting specific muscle groups with controlled movements. Common pin-loaded stations include leg presses, chest presses, and lat pulldowns, which offer a safer and more focused alternative to free weights, making them suitable for both beginners and experienced lifters.