One of the key elements contributing to the success of the Pilates Reformer bed lies in its intricately designed spring system, offering users diversity and adaptability. The springs in this system come in four colors: green, red, blue, and yellow. Each color represents a different spring tension, providing users with personalized training options.

1. Green Springs: Green springs offer the maximum tension in the system. Suitable for highly trained individuals, they provide challenging and high-intensity exercise options. The use of these springs requires more strength and stability, offering users a comprehensive and motivating workout.

2. Red Springs: Following in tension, red springs are suitable for users seeking a challenge without excessive difficulty. With substantial tension, they cater to moderate to high-intensity exercises, aiming to enhance strength and endurance.

3. Blue Springs: Blue springs are suitable for exercises with moderate tension, catering to a broad user base. This is a versatile option, providing enough challenge while being suitable for users with different levels of fitness and stamina.

4. Yellow Springs: Offering the lightest tension in the system, yellow springs are suitable for beginners or users looking for low-intensity restorative exercises. The use of these springs can alleviate joint strain, providing a safe and effective training environment for beginners.

These springs not only vary in tension but also possess high strength and resilience. This design ensures the durability of the springs, maintaining excellent performance even under prolonged and high-intensity use. Users can choose the springs that suit their health conditions, fitness levels, and exercise goals, thus achieving a comprehensive and personalized Pilates training experience.