Leg extensions work quadriceps in addition to working knee extensors.
Leg curls train the hamstrings Leg curls work to stabilize this ‘balance’ and thus help prevent possible hamstring injuries.
Squats strengthen the hip flexors, quadriceps, and gluteals. Squats should be performed within the proper range of motion, with feet shoulder with apart and toes slightly pointed outward.
Calf raises work the gastrocnemius(muscle that is in the back part of the lower leg and also called the calf) and the soleus (also located in the back part of the lower leg ,the calf)
Lunges are an excellent compound lift which works the quads, hamstrings, abdominals, back, and calves.
Bench presses work the pectoralis major and minor, triceps, and deltoids.
Lat pulldowns for the rotator cuff.
Sit-ups strengthen the abdominals, hip flexors, and supporting muscles of the lower back.
Military presses work the deltoids, triceps, pectoralis, and extensor muscles of the forearm.