5d12f34d_ct_Guides___Health_and_Fitness__MUSCLE_GROUP
[WHAT IT IS?] The ones on the front of your thighs [WHEN DO YOU USE IT?] When you stand up from a chair, climb stairs, or push off to start walking. [WHICH MACHINES EXERCISE IT?] Exercise bikes, rowers, home gyms [MUSCLE GROUP] 
Quadriceps
Argos Product Guides - Health and Fitness
MUSCLE GROUP