Sushmita Sen shared her fitness progress after a heart attack, inspiring a guide to building a sculpted back. Key principles include compound movements (deadlifts, bent-over rows, pull-ups), isolation exercises (lat pulldowns, face pulls), proper form, progressive overload, balanced diet (protein, carbs, healthy fats), rest, consistency, variation, warm-up/cool-down, and listening to your body. Sample exercises are provided with instructions. Remember, individual responses vary, so tailor your approach to your needs and goals.