Exercise Comparison
Alternate Leg Diagonal Bound vs Hack Squat




Side-by-Side
Muscle Analysis
Shared
Only in Alternate Leg Diagonal Bound
Instructions
Alternate Leg Diagonal Bound
Assume a comfortable stance with one foot slightly in front of the other.
Begin by pushing off with the front leg, driving the opposite knee forward and as high as possible before landing. Attempt to cover as much distance to each side with each bound.
It may help to use a line on the ground to guage distance from side to side.
Repeat the sequence with the other leg.
Hack Squat
Place the back of your torso against the back pad of the machine and hook your shoulders under the shoulder pads provided.
Position your legs in the platform using a shoulder width medium stance with the toes slightly pointed out. Tip: Keep your head up at all times and also maintain the back on the pad at all times.
Place your arms on the side handles of the machine and disengage the safety bars (which on most designs is done by moving the side handles from a facing front position to a diagonal position).
Now straighten your legs without locking the knees. This will be your starting position. (Note: For the purposes of this discussion we will use the medium stance described above which targets overall development; however you can choose any of the three stances described in the foot positioning section).
Begin to slowly lower the unit by bending the knees as you maintain a straight posture with the head up (back on the pad at all times). Continue down until the angle between the upper leg and the calves becomes slightly less than 90-degrees (which is the point in which the upper legs are below parallel to the floor). Inhale as you perform this portion of the movement. Tip: If you performed the exercise correctly, the front of the knees should make an imaginary straight line with the toes that is perpendicular to the front. If your knees are past that imaginary line (if they are past your toes) then you are placing undue stress on the knee and the exercise has been performed incorrectly.
Begin to raise the unit as you exhale by pushing the floor with mainly with the heel of your foot as you straighten the legs again and go back to the starting position.
Repeat for the recommended amount of repetitions.
Verdict
Both exercises target the quadriceps. Alternate Leg Diagonal Bound is a beginner exercise using none, while Hack Squat is beginner and uses machine. Choose Alternate Leg Diagonal Bound if you have access to none, or Hack Squat if you prefer machine.