Whether an expert in the gym, a beginner to working out, or rehabilitating after an injury, ProSource Therapy Flat Resistance Bands are an effective form of strength training that provide variety for your workouts and challenge your muscles in new ways. The elastic bands are color-coded to indicate 3 resistance levels: light, medium, and heavy.They allow you to work from different angles to involve more muscle groups, with a greater range of motion than with traditional weight machine exercises. The flat, lightweight design is extremely versatile for upper/lower body and Pilates exercises. Loop around a sturdy object or tie at the ends for endless possibilities to improve balance, strength, and coordination. They are also perfect for all types of physical therapy including rehabbing torn rotator cuffs, bad elbows, and damaged knees. The durable latex rubber guarantees high resilience for ongoing use. A door anchor and convenient carrying bag enable you to workout from home or while traveling, so you can stay fit wherever life may take you. Don"t buy cheap knockoffs. Train like a Pro, train with ProSource.