Hamstring injury information

[Leeroy Jenkins Ph.D.]

I found a fantastic post on Reddit about hamstring injuries and average number of games missed.

 

Strength-Speed 774 points 3 hours ago*

They did a study on 38 NFL hamstring strains

Players missed 2.6 ± 3.1 games. Based on MRI, the hamstring injury involved the biceps femoris long head in 34 cases and the proximal and distal hamstrings in 25 and 22 cases, respectively. When < 50% of the muscle was involved, the average number of games missed was 1.8; if > 75%, then 3.2. Ten players had retraction, missing 5.5 games. By MRI, grade I injuries yielded an average of 1.1 missed games; grade II, 1.7; and grade III, 6.4. Players who missed 0 or 1 game had an MRI score of 8.2; 2 or 3 games, 11.1; and 4 or more games, 13.9.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3445213/

[Mr. Scot]

I get what they're saying, but I find the concept of missing "3.1 games" kind of amusing.

[BlitzMonster]

9 minutes ago, Mr. Scot said:

I get what they're saying, but I find the concept of missing "3.1 games" kind of amusing.

yeah - definitely an odd way of saying it

I think the conclusion is an average of 2.6 games missed with a standard deviation of 3.1 

[Mr. Scot]

I guess one tenth of a game would be six minutes.

[Adb6368]

Doctor, can you please provide analysis of how many of these players reinjured their hamstring later in the year or were just reinjured themselves because of overcompensating with other body parts? I’m sure Reddit has this information readily available 

[mbarbour21]

2 minutes ago, Mr. Scot said:

I guess one tenth of a game would be six minutes.

Hmm....they must be including the game they were injured in? Haha!

[Luciu5]

5 minutes ago, Mr. Scot said:

I guess one tenth of a game would be six minutes.

It's more....9/10 missed 3 games, 1 guy missed 4 games, thus 3.1 games avg.

(Don't check the math, it's close enough to get my point.)

[Mr. Scot]

13 minutes ago, Luciu5 said:

It's more....9/10 missed 3 games, 1 guy missed 4 games, thus 3.1 games avg.

(Don't check the math, it's close enough to get my point.)

I understand how they get the numbers.

I just find it amusing.

[BlitzMonster]

Games are thought of as discrete data.  You play in a game or you don't.  Yes / No.  

Here the study is talking about averages.  In statistical terms, averages are continuous.  You can have an average of 2.6 games.  Or 2.3333.  Or 2.19293.  A continuous measure can include any fraction because you're looking at an overall summary of a whole bunch of games.  

 

The most important conclusion of the study is the average of 2.6 games missed for hamstring injuries.  So the best guess is that CMC will miss the next 2 or 3 games.    

[NAS]

Encouraging info, I'm hopeful no more than 3 - 4 games for CMC.

[Donald LaFell]

58 minutes ago, Leeroy Jenkins Ph.D. said:

I found a fantastic post on Reddit about hamstring injuries and average number of games missed.

 

Strength-Speed 774 points 3 hours ago*

They did a study on 38 NFL hamstring strains

Players missed 2.6 ± 3.1 games. Based on MRI, the hamstring injury involved the biceps femoris long head in 34 cases and the proximal and distal hamstrings in 25 and 22 cases, respectively. When < 50% of the muscle was involved, the average number of games missed was 1.8; if > 75%, then 3.2. Ten players had retraction, missing 5.5 games. By MRI, grade I injuries yielded an average of 1.1 missed games; grade II, 1.7; and grade III, 6.4. Players who missed 0 or 1 game had an MRI score of 8.2; 2 or 3 games, 11.1; and 4 or more games, 13.9.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3445213/

I can’t trust this until I know what your doctorate is in 

[L-TownCat]

43 minutes ago, mbarbour21 said:

Hmm....they must be including the game they were injured in? Haha!

Actually that would explain it.  

[mbarbour21]

Just now, L-TownCat said:

Actually that would explain it.  

[Ricky Spanish]

48 minutes ago, BlitzMonster said:

Games are thought of as discrete data.  You play in a game or you don't.  Yes / No.  

Here the study is talking about averages.  In statistical terms, averages are continuous.  You can have an average of 2.6 games.  Or 2.3333.  Or 2.19293.  A continuous measure can include any fraction because you're looking at an overall summary of a whole bunch of games.  

 

The most important conclusion of the study is the average of 2.6 games missed for hamstring injuries.  So the best guess is that CMC will miss the next 2 or 3 games.    

I'm going to guess 3 to err on the side of caution