Mixing up heavy and light weights in a workout burns more muscle sugar than sticking to one weight the whole time—likely because you do more total work.

Changing the weight you lift during a workout burns more muscle sugar than lifting the same weight the whole time.

People who don’t lift weights regularly lose more muscle sugar during a workout than those who train regularly—likely because their bodies are less efficient at using energy.

The more sets you do in a weightlifting workout, the more your muscle sugar stores get used up—each extra set burns about 11 more units of energy.

Surprisingly, lifting heavier weights doesn’t burn more muscle sugar—it actually burns less, possibly because you can’t do as many reps.

The longer you lift weights in one session, the more your muscle sugar gets used up—every extra minute burns about 1.3 more units of energy.