Kyle Terada-USA TODAY Sports

Kyle Terada-USA TODAY Sports


How does 49ers DE Nick Bosa’s ACL Look Moving Forward? One Expert Weighs In

Jul 29, 2021 at 11:42 AM--




It started with a simple video tweeted by The Athletic's David Lombardi. You can see the video above. It is just a run-of-mill, 28-second video of some San Francisco 49ers players stretching. What was notable about the video was that one of the players was defensive star, Nick Bosa. Bosa, as you will painfully recall, tore his left ACL last September, forcing him to miss the remainder of the 2020 season.

It was just a normal video that showed Bosa on the field warming up. But the video caught the eye of a medical professional who liked what he saw. Dr. Nirav Pandya, Associate Professor of UCSF Orthopedic Surgery, and Director of Sports Medicine at Benioff Children's Hospitals, tweeted, "Great double leg squat form for Nick Bosa. This (along with single leg squat) is one of the tests we use after ACL surgery to track recovery and predict future injury risk." I saw his tweet and was curious. Since I tend to worry about players returning from serious injuries, I wanted to know what he was looking for, and how this predicted future injury risk.

I reached out to ask what he meant, and he graciously replied. Dr. Pandya told me they look for "symmetry between the legs, balance, and fluid motion. The knees dropping inward during a squat is predictive of both weakness & future re-injury." He encouraged me to Google "RG3 NFL Combine Valgus" for images that would serve as a great example. And so I did.

One website I found showed images of Robert Griffin III at the 2012 Combine. In the images, you can see how his knees cave in as he takes off and lands his vertical and broad jump attempts. The angle between his hips and knees, known as the Q angle, are not normal. This abnormality is known as valgus knee collapse. It is where the knees cave in, rather than out, like during a squat, a jump and landing, or any other quick move, like cutting. And while there can be multiple factors that develop this, one likely cause appears to be years of poor knee mechanics. Knee valgus collapse, or medial knee, can be a predictor of future problems, and even ACL problems.

But when Dr. Pandya saw the video of Bosa, he did not see the collapsing, or caving of the knees. Said Dr. Pandya, "Signs that someone is still not fully recovered usually shows up physically, such as swelling or a limp. More subtle things that can indicate that recovery is going well include symmetry between the two legs during more functional activities such as squatting, running, or jumping. The reason why symmetry is so important is that equal strength between the two legs is one of the last criteria we use to 'clear' a player." Bosa does not appear to have swelling or limping. And 49ers medical staff has cleared him, so he appears to be fully healed.

But I wanted to know how this looked, as far as Bosa's future with his knees. This is his second ACL tear. He tore his right ACL in 2015, while in high school. Is there anything we can learn, even from a short video clip, that can inform us about possibilities of knee problems moving forward? Obviously this is football, and injuries can happen at any point. But Dr. Pandya did give me some comfort, saying, "...the combination of the fact that 49ers medical staff has cleared him, plus how well he looked in his videos from yesterday, are good signs. The lack of his knee dropping in when he does a squat is a good sign, both for current recovery and future injury risk. Overall, greater than 75 percent of NFL players return to play after an ACL tear, so the numbers are in his favor. The largest risk factor for him moving forward is the fact that he has had an ACL surgery in both legs. That all being said, it's a short 15-second clip, but a good sign, nonetheless!"

This was good news to me. I was concerned. Now I'm not as much. I'll pass this on to the future defensive player of the year...just in case he's worried, too.

Special thanks to Dr. Nirav Pandya for his time and insight. Follow him on Twitter @DrNiravPandya. He also has a sports medicine podcast. Go check it out.
The opinions within this article are those of the writer and, while just as important, are not necessarily those of the site as a whole.





More San Francisco 49ers News



Kyle Shanahan weighs in on Trey Lance's ability to be a good pocket QB for the 49ers

By David Bonilla
Sep 11

Everyone is excited about what Trey Lance might mean for the future of the San Francisco 49ers offense. The athletic rookie quarterback had 1,100 rushing yards and 14 rushing touchdowns to go with his 2,786 passing yards and 28 passing touchdowns as a sophomore at North Dakota State. While it was against lesser collegiate competition, the total was still impressive. However, Lance's potential as a pocket passer grabbed head coach Kyle Shanahan's attention. The bonus of his ability to make things happen with his legs convinced San Francisco to trade a haul of future draft capital to move up and select Lance with the No. 3 overall pick. Lance is just 21 years old and still has to learn to be a better pocket quarterback before taking over the reins. However, the



Baldy reveals why Nick Bosa is the 49ers player he is most excited to watch

By David Bonilla
Sep 8

For those who may have doubted, George Kittle has repeatedly said that his San Francisco 49ers teammate, Nick Bosa, is pretty good at football. Unfortunately, fans didn't see much of the defensive end in his second NFL season, as his sophomore campaign was cut short by an ACL injury. While injury after injury followed Bosa's, the loss of the 2019 NFL Defensive Rookie of the Year was greatly felt throughout the roster. San Francisco finished with just six wins after entering the season with Super Bowl aspirations. NFL Network analyst Brian Baldinger joined 95.7 The Game on Tuesday and was asked which 49ers player he is most excited to see on Sunday against the Detroit Lions. He answered before the question could be finished. "Bosa!" Baldinger quickly



49ers-Lions: Kyle Shanahan discusses plan for Dee Ford, Nick Bosa, explains Josh Norman signing

By David Bonilla
Sep 9

The San Francisco 49ers defense should be much improved with the returns of edge rushers Nick Bosa and Dee Ford. Both are coming off significant injuries, missing most of last season. Ford appeared in just one game before a back injury sidelined him. Bosa's 2020 campaign ended with an ACL injury during Week 2. Earlier this week, Ford said he expects to be on a pitch count during Sunday's regular-season opener against the Detroit Lions. That's not uncommon for players coming off an injury, and the veteran pass rusher hasn't been an every-down player during his time with the 49ers, even when he was healthier. Instead, Ford mostly went onto the field during situational downs,



Kocurek excited for return of Nick Bosa, Dee Ford after 49ers pass rushers reached 'lowest of lows'

By David Bonilla
Sep 9

It has been a rigorous offseason for San Francisco 49ers pass rushers Nick Bosa and Dee Ford. Both exited last season early due to injuries. First, a back injury sidelined Ford after Week 1. Then, during Week 2, Bosa exited after suffering a torn ACL on that awful MetLife Stadium field. What followed were two hellacious comebacks. But, the good news is that the end is in sight. Bosa and Ford will retake the field when the Niners open their season against the Detroit Lions at Ford Field on Sunday. Bosa showed off videos during his rehab, and the 2019 NFL Defensive Rookie of the Year looked ahead of schedule during the process. Bosa's coaches never questioned the defensive end's work ethic. They know the pass rusher can accomplish whatever he sets his mind


Featured

Trending News

Share 49ersWebzone