Angkor Muscle Gym is a long-standing, no-frills bodybuilding and weightlifting hub nestled near the Siem Reap River, about a 10‑minute stroll from the Old Market area . Operating since around 2001 under the stewardship of Sok Sour and his wife Iv Kimsay, it’s closely tied to the Angkor Bodybuilding Association and exudes a strong community vibe. Entry for foreigners is just US $1—locals pay about 2,000 riel—with locker and towel included; using cardio machines costs an extra $1. Inside, you’ll find a massive free-weight zone packed with benches, dumbbells up to 50 kg, squat and Smith machines, cables, leg machines, and just a few cardio machines . The atmosphere is lively and testosterone-fueled, with many Khmer men proudly training shirtless and pausing to flex between sets—but newcomers are welcomed and often find the environment fun and encouraging. There’s also a back area for classes or stretching, and a front reception sells supplements like protein powder and pre-workout for about £1 per bag . Open daily from 5 AM to 9 PM, it’s a humble yet efficient option if you’re serious about lifting and don’t mind skipping air-conditioning and luxury extras.