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While it is difficult to compare the relative hip, knee and ankle moments of the three stance widths because of differences between subjects, there is no indication in this study that wider stance width squats involve lower knee extension moments than narrow stance width squats. In fact, the wider stance squats seemed to produce greater knee extension moments, suggesting they may be better for strengthening the quadriceps than narrow stance squats.
For strength and power athletes:
There was a trend for greater time spent in the acceleration phase in wider stance squats, which is an indicator that wider stance squats could provide a greater training effect. Strength and power athletes may therefore obtain greater benefits from wider stance squats.
There was a trend for both knee and hip moments to increase with increasing stance width. This is another reason for strength and power athletes looking to develop leg strength and power to prefer wider stance squats.
and i could also push better with my heels
In Biomechanics and Kinesiology, in order to push through the heels a person must first shift the weight backwards. To do so, requires a contraction of the muscles on the front of the lower leg. In EMG research testing in my lab, the entire anterior compartment of the lower leg (shin) contracts once the weight shifts behind the mid point of the foot.
The gastroc/soleus complex also contracts but only acts more as a stabilizer than a primary mover. This means the calves neither receive nor deliver any force to the middle of the foot or the big toe when pushing through the heels. In other words if the weight is in the heels and the lifter pushes through the heels, the entire front of the leg contracts to help with the squat. NOT THE BACK OF THE LEG!
As a result of the single exercise cue “Push through the heels” sports and fitness professionals have inadvertently contributed to an increase in Achilles tendon injuries, knee injuries, low back pain and injuries, tight hips, and numerous other injuries. It’s time for a change in the industry and it starts with exercise professionals. I have come to that conclusion based not on opinion but after evaluation of the Biomechanics data of over 50,000 athletes and exercisers over the past 18 years.
As a former hurdler, I NEVER ran on my heels. However distance runners (more in the US than other countries) were instructed to run with a heel strike. Here’s a common sense question, if pushing through your heels help increase glute muscle contraction, wouldn’t distance runners have large glutes and strong hamstrings? In addition, would sprinters (who incidentally run on the balls of their feet) have small glutes and stronger quads when compared hamstrings? Instead, its just the opposite. Distance runners have large quads and non-existent glute muscle development when compared to sprinters.