Research

Energy balance

Aerobic training (AT) is superior to resistance training (RT) for reducing total body mass and fat mass in overweight or obese adults when exercise time is matched.

If your goal is to lose fat and body weight, prioritize aerobic exercise (like running, cycling, or elliptical) over resistance training. While lifting weights is great for building muscle, it does not reduce fat mass as effectively as aerobic exercise when you spend the same amount of time exercising. To maximize fat loss, focus on aerobic activities at 65-80% of your max heart rate.

StrongSupportsVERY_HIGH confidence
The AT and AT/RT groups reduced total body mass and fat mass more than RT (p<0.05)... AT was more effective than RT for the reduction of fat and body mass in previously sedentary, non-diabetic, overweight or obese adults.
Leslie H. Willis et al. · Journal of Applied Physiology · 2012

Why this rating

Large randomized controlled trial (n=119 with consistent body comp data) with high statistical power (0.95-1.0) and direct verification of exercise.

Source

Effects of aerobic and/or resistance training on body mass and fat mass in overweight or obese adults

Leslie H. Willis et al. · Journal of Applied Physiology · 2012

DOI 10.1152/japplphysiol.01370.2011

rct · n=119Cited 476×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →