Test Validity

Naspe recommends the trunk lift as a test to measure lower back strength. Also, the Cooper Institute validated the trunk test for for ages 5 to 17+ for trunk extensor and flexibility. The test measures what it is suppose to measure which is the trunk extensor strength and flexibility and its relationship to low back health, especially proper vertebral alignment. Musculoskeletal fitness of the abdominal muscles, hamstrings, and back extensors work together to maintain posture and low back health. And, as we know maintaining low back health is crucial to students as they work to stay healthy for a lifetime. (In adults, lower back pain is a common complaint, so working on the trunk lift can help youngsters develop healthy lower backs for a lifetime).