This is activity is used with gym mats and can It really be used increase the following skills:Muscular Strength, muscular endurance, speed, quickness, and agility. You'll find that you don't have to use mats but can use anything for these progressions. It's also a simple activity for partners, individuals, and small group work. It can really increase the fitness level of your students, especially in their lower body. This activity is designed to work at any age K-12 and beyond.