Maximal force can be expressed across a range of conditions influenced by the external load and the time available to express force. As a result, several distinct and specific strength qualities exist. Conversely, some expressions of maximal force are similar and can be categorized as a single quality. Therefore, strength assessment systems must be sophisticated enough to isolate and measure each quality while minimizing redundant information. This article presents a contemporary, evidence-based and practical framework that reduces the many strength and speed-strength metrics into 5 distinct qualities. Alongside this, we present case examples of the application of strength diagnosis.

The Certified Performance and Sport Scientist (CPSS) specializes in the application of scientific processes to improve individual and team athletic performance and decrease injury risk. The CPSS may be either a generalist, working across the breadth of scientific disciplines, or a specialist practitioner, who has training and/or applied experiences predominantly within one or more specific scientific discipline area(s) relevant to sport science and sports performance.

The Journal of Strength and Conditioning Research is the NSCA's scientific journal. This monthly publication prints original research information important to strength and conditioning practitioners. Many educational institutions, researchers, and professionals retain this journal as a valuable reference.

Meet the winners of the 2026 NSCA Elections, elected to strengthen the organization, support NSCA Members, and advance the strength and conditioning profession.