Classroom implementation of Hill's force-velocity relationship using accessible materials in resource-limited...

The force-velocity relationship, originally described by Hill (Proc Biol Sci 126: 136-195, 1938), is a foundational concept in muscle physiology and biomechanics. Despite its theoretical relevance, its instructional application remains limited in educational settings without laboratory infrastructure. Here, we present a low-cost strategy for teaching the force-velocity relationship using accessible materials and commonly available software. The procedure was implemented in a regular classroom environment and involved estimating velocity from the number of repetitions performed with different loads over a fixed time interval. Classroom-derived data were used to construct force-velocity and power-velocity curves, with the objective of illustrating expected biomechanical patterns, without evaluating learning outcomes. The activity emphasized biomechanical reasoning and graphical interpretation, incorporating simplified measurement tools as part of the instructional process. The strategy is adaptable to resource-limited contexts and may be extended to other biomechanics topics that require the operationalization of theoretical relationships.NEW & NOTEWORTHY This paper describes a low-cost, classroom-tested instructional strategy for teaching Hill's force-velocity relationship using accessible materials and commonly available software. Classroom-derived data are used to construct force-velocity and power-velocity curves, enabling the operationalization of classical biomechanical concepts without laboratory-grade equipment. The approach is adaptable to resource-limited educational settings and supports hands-on exploration of muscle mechanics.