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Choosing the right thickness of rubber mats is a critical decision for both home and commercial gyms, as it directly affects safety, equipment protection, noise control, and user comfort. This article explores the key factors influencing rubber mat thickness selection, provides targeted recommendations for different gym scenarios (including home gyms, commercial fitness centers, weightlifting zones, and cardio areas), and addresses common misconceptions to help gym owners and fitness enthusiasts make informed choices. The appropriate thickness not only extends the service life of the subfloor and gym equipment but also enhances the overall workout experience while reducing the risk of injuries.

Styrene-Butadiene Rubber (SBR) is one of the most widely used synthetic rubbers in the world, synthesized by the copolymerization of styrene and butadiene monomers. It has become an indispensable material in the sports industry due to its excellent properties such as abrasion resistance, good resilience, shock absorption, flexibility, and cost-effectiveness. This article briefly introduces the basic characteristics of SBR, focuses on its diverse applications in sports fields—including sports surfaces, athletic footwear, sports protective gear, and sports equipment accessories—and analyzes the advantages of SBR in improving sports safety, enhancing athletic performance, and extending the service life of sports products. Finally, it looks forward to the development trend of SBR in the sports industry, emphasizing its important role in promoting the modernization and safety of sports facilities and equipment.

Gym rubber mats are an indispensable component of both commercial and home fitness spaces, and their thickness directly determines performance, safety, durability, and user experience. This article explores the core impacts of gym rubber mat thickness on key aspects such as shock absorption, noise and vibration control, subfloor and equipment protection, workout stability, comfort, and durability. It also provides targeted recommendations for thickness selection based on different workout types (e.g., cardio, weightlifting, yoga) and gym settings (home gyms, commercial gyms), helping fitness enthusiasts and gym operators make informed decisions. Choosing the right thickness not only optimizes the workout environment but also extends the service life of the mats and reduces maintenance costs, avoiding common problems such as subfloor damage, excessive noise, and unstable training surfaces caused by improper thickness selection.

Styrene-butadiene rubber (SBR) is a widely produced synthetic rubber copolymer formed by the polymerization of styrene and butadiene monomers. As one of the most common general-purpose synthetic rubbers globally, it serves as a cost-effective alternative to natural rubber, offering favorable abrasion resistance, thermal stability, and mechanical durability. SBR is categorized primarily by its polymerization process—emulsion (E-SBR) and solution (S-SBR)—and finds extensive application across tire manufacturing, industrial components, consumer goods, and construction materials. This review outlines its chemical structure, production methods, key properties, major applications, and industrial significance.

Ethylene-propylene-diene monomer (EPDM) rubber is a saturated elastomer widely used in automotive, construction, and wire & cable industries due to its excellent weather resistance, heat aging resistance, and chemical stability. The ethylene content is one of the most critical structural parameters that dominantly determines the crystallization behavior, processability, and final mechanical and functional properties of EPDM. This paper systematically reviews the influence of ethylene content (ranging from 45 wt% to 80 wt%) on the molecular structure, crystallization, rheological properties, mechanical performance, low-temperature flexibility, and application adaptability of EPDM. The results indicate that increasing ethylene content promotes the formation of polyethylene crystallites, which act as physical cross-linking points, effectively enhancing the hardness, tensile strength, tear resistance, and compression set resistance of vulcanizates. However, the increased crystallinity lead