Science / Health

Jabari Mosley: Why the Same Weight Can Feel Different on Two Gym Machines

Comparison of adjustable gym machines highlighting weight differences in strength training equipment

Jabari Mosley is an experienced business leader based in Birmingham, Alabama, who has owned and operated multiple companies across construction, real estate, and retail. He founded Driven Properties and Investments in 2005, growing the rental property company into a portfolio of more than 100 units, and in 2010 expanded into real estate development through an ownership role at Infinity Investments. Since 2022, Mosley has owned Cornerstone Quality Construction, a licensed home builder in Alabama, Georgia, and Louisiana focused on new builds, property flips, and institutional contract work. His earlier ventures include Trilogy Technology, a computer repair business he ran from 1999 to 2005, and Paramount Auto, a multiple-time Dealer of the Year winner he led until 2021. A University of Alabama at Birmingham graduate in information systems, Mosley stays active through cycling and gym workouts, an interest that ties into why the same weight can feel different on two gym machines.

Why the Same Weight Can Feel Different on Two Gym Machines

Two gym machines can show the same selected weight without producing the same resistance. On cable machines, pulley ratio affects how much of the selected stack load reaches the handle. The stack number alone therefore cannot establish comparable resistance across machines.

Pulley ratio describes the relationship between stack weight and handle resistance. In a 1:1 system, the selected stack weight corresponds to the resistance at the handle. In a 2:1 system, handle resistance is about half the selected load, so 100 pounds on the stack produces about 50 pounds at the handle.

Pulley ratio does not describe how resistance changes throughout an exercise. Some machines use cams, shaped rotating components that create variable resistance through the range of motion, or movement path. Different cam geometries can shift where resistance rises or falls.

This changing pattern, called the resistance profile, can vary across brands and models.

When comparing cable machines, check the pulley ratio first. On cam-based machines, treat the resistance profile as a separate characteristic from pulley ratio. This separates how much resistance reaches the handle from how that resistance changes through the movement.

About Jabari Mosley

Jabari Mosley is a business leader based in Birmingham, Alabama, who has owned and operated companies spanning construction, real estate, and retail. He founded Driven Properties and Investments in 2005 and later took ownership roles at Infinity Investments and Cornerstone Quality Construction, a licensed home builder in Alabama, Georgia, and Louisiana. His past ventures include Trilogy Technology and Paramount Auto, a multiple-time Dealer of the Year winner. A University of Alabama at Birmingham graduate, Mosley stays active through cycling and regular gym workouts.

Carl Herman
About author

Carl Herman is an editor at DataFileHost enjoys writing about the latest Tech trends around the globe.