The main difference between a yoga mat and a gym mat is usually the thickness. Yoga mats are usually considerably thinner than a gym mat. A fitness mat has a thickness of 0.9 cm - 2.8 cm, whereas a yoga mat is usually around 0.6 cm thick. The thickness of the fitness mat ensures joint-friendly cushioning during dynamic training, such as exercises on the knees or with weights. The thinner a mat is, such as the yoga mat, the more support it provides during physically demanding balance exercises.