The End of the World: When People Are in the Gym, They Become Stronger by Lifting Irons!

Black rain poured down, and bloody lightning tore through the night sky. Corrosive rain melted everything, huge insect waves emerged from the ground, the human order collapsed overnight, and the survivors huddled in the ruins and lingered. Chen Nian, a programmer who was trapped in the gym late at night, was accidentally bound to the [Strongest Meat Modification System]. Rolling iron can strengthen your body, squats can increase your strength, bench press can temper your muscles and bones, and deadlifts can unlock your genetic locks! Others are hoarding supplies and trembling, while he is banging and banging iron to upgrade. While others hugged each other for warmth and begged for help, he tore apart mutated cockroaches and punched people with supernatural powers with his bare hands. Metal corrosion? The skin and flesh are harder than alloy! A swarm of insects siege the city? One punch and it shattered into pieces! Passerby: Please give me someone who stutters! Chen Nian: Add more movies!