Common fitness assessments used in gyms include body composition tests, strength assessments, and aerobic capacity tests. These assessments provide data on an individual's physical health and fitness level. For example, skinfold measurements help assess body fat percentage, while dynamic strength tests measure maximum lift capacities. The VO2 max test gauges aerobic endurance. These tests are essential for setting fitness goals, tracking progress, and tailoring fitness programs to meet individual needs. Overall, they provide valuable insights to enhance workout strategies and outcomes.