4. Chair leg extensions Chair leg extensions can work the quads. Jam Press Vid/James De Lacy Similar to seated leg lifts, all you need for this one is your office chair.

Perform 12 extensions per leg when doing a circuit, or perform them to exhaustion when doing one exercise at a time. Kneel in the seat of your chair so you’re facing the chair back.

Office chair leg extensions are a simple yet effective exercise for targeting your quadriceps and improving lower body strength. Begin by sitting upright in your chair with your feet flat on the ...