Engineered for both professional athletes and home fitness enthusiasts, this stretching board features a reinforced triangular ABS frame with 3 cm-thick support beams that withstand up to 440 lbs (200 kg) while maintaining rock-solid stability during intense calf stretches . Its four-angle adjustment (25 °/30 °/35 °/40 °) enables phased progression—from a gentle 25 ° incline for beginner hamstring activation to a 40 ° deep fascia release for experienced users . The ergonomic footplate (35 × 30 cm/13.8 × 11.8 in) accommodates all foot sizes, ensuring even pressure distribution and comfort .