Strength- or resistance-based exercise builds muscle that keeps burning energy even when you rest. New research shows this type of training leads to greater fat loss and better blood-sugar control than steady-state cardio sessions. In the trial, people who lifted weights three times a week gained lean muscle while also losing body fat, an ideal “body recomposition” result.
The added muscle also helped stabilise their glucose levels, an important marker of metabolic health.
Cardio can still improve fitness, but it does not prompt the same rise in calorie-burning muscle tissue. Trainers say you do not have to use heavy barbells to benefit: body-weight moves, resistance bands, sandbags, Pilates or barre classes all count as strength work. Building strength also helps people feel physically stronger and often leaner, dispelling the myth that lifting weights automatically makes you bulky.
Taken together, the evidence suggests prioritizing regular strength sessions and using cardio as a secondary tool for heart and lung fitness rather than primary fat loss.
Strength training is more effective than aerobic exercise for improving glycaemic control and body composition in people with normal-weight type 2 diabetes: a randomised controlled trial – 26 July 2023
In a nine-month randomised trial, adults with type 2 diabetes who performed strength training three times a week reduced body fat, added lean muscle and achieved better long-term blood-sugar control than participants assigned to aerobic exercise or a mixed routine. The authors conclude that resistance work is the most efficient exercise prescription for simultaneous fat reduction and metabolic improvement
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