Obby: Pump Up Your Muscles! 1 Per Second

Step into a prison gym where only strength earns respect in Obby Pump Up Your Muscles 1 Per Second, a free 3D browser game that turns every workout into progress. You start as a skinny rookie with nothing but determination, and every push-up, sit-up and pull-up makes your character visibly stronger. Train hard, eat well, and climb the gym ranks as you unlock new exercises, bigger weights and tougher rivals. The simple one-per-second training loop is easy to pick up but hard to put down, because each rep brings a small reward and each rank brings a new goal. Explore the gym, interact with equipment and food, and watch your rookie grow into a powerhouse through steady effort and smart timing. There are no downloads and no installs needed. Play instantly in your browser on desktop, mobile or tablet, and enjoy short sessions or long grinding runs whenever you have a few minutes. With colourful 3D graphics, relaxed idle-style progression and a fun prison gym theme, this casual simulation game is perfect for players who love incremental progress, character growth and light-hearted competition. Build muscle, earn respect, and prove that even the skinniest rookie can become the strongest in the gym.