描述

Core functions and training principles:

Precise target muscle group strike: The core focuses on the pectoralis major muscle (especially the midline of the pectoralis), simultaneously strengthening the anterior deltoid and triceps brachii, shaping an upright upper body posture.

Biomechanical advantages: The unique design (fixed trajectory + adjustable resistance) ensures a constant tension is applied to the pectoral muscles throughout, especially at the peak of the movement (arms together), achieving maximum compression and peak contraction, deeply stimulating muscle growth.

Isolated training model: Compared with free weights (such as bench press), it greatly reduces the stable burden on the shoulders, allowing trainees to focus more on the force sensation of the pectoral muscles, significantly improving the recruitment efficiency of the target muscles. It is an excellent choice for sculpting the details of the pectoral muscles.

Types and structural features of the equipment:

Sitting butterfly machine (mainstream)

Ergonomic chair: Adjustable at multiple angles (height, front and back), ensuring that the shoulder axes and rotation axes of users with different body types are aligned, and the movement trajectories are precise.

High load-bearing frame: Stable steel frame structure, wide base to prevent overturning, ensuring safety during heavy weight training.

Double-lever drive system: Independent or linked arms on both sides, connected to counterweight plates, providing smooth resistance.

3D adjustable arm pad: Height, Angle, and spacing can be adjusted in multiple dimensions, perfectly matching different arm lengths and training needs (normal grip/opposite grip).

Counterweight system: Pin-type selection plate (50-100kg+ range) or intelligent digital resistance (high-end models), with precise increment (usually 2.5-5kg per plate).

Comfortable contact surface: The arm pad and backrest are wrapped with high-density foam, and the breathable and wear-resistant fabric enhances the experience.

Standing posture/gantry variation: Utilize ropes to achieve more Angle changes (such as high chest clamping for lower chest training, low chest clamping for upper chest training), providing greater flexibility.

Core training effects and values

Build a full chest shape: Significantly enhance the overall dimension and strength of the pectoralis major muscle, and bid farewell to a thin chest cavity.

Engraving the deep middle seam: Through the powerful compression at the peak, it effectively improves the “outward expansion of the pectoral muscles” and shapes an attractive “cleavage line”.

Enhance muscle separation: The isolated training feature helps to clearly demarcate the pectoral muscles from the shoulders and arms.

Improve posture and functionality: Strengthen the muscle groups needed for daily movements such as pushing and hugging, and combat hunchback.

Safe and efficient shaping: Fixed trajectory reduces the risk of injury, especially suitable for beginners or rehabilitation trainees.