Overuse is Not the Problem: Undertraining is the Devil

I’ve been trying to put this article into words for the better part of a year and debated completely shelving it, because frankly, it’s extremely controversial and not accepted by most of the people who train baseball players. However, I am not going to stay silent on the issue any longer: I think the trend of diagnosing injuries to the pitching arm as the result of “overuse” is complete garbage. Here, let me make that exceedingly clear:

Pitchers are hurt because they are undertrained – NOT overused!

The American Sports Medicine Institute (ASMI) publishes a set of instructions that are aimed at reducing and preventing pitching arm injuries in youth baseball athletes. They are:

1. Watch and respond to signs of fatigue. If a youth pitcher complains of fatigue or looks fatigued, let him rest from pitching and other throwing.
2. No overhead throwing of any kind for at least 2-3 months per year (4 months is preferred). No competitive baseball pitching for at least 4 months per year.
3. Follow limits for pitch counts and days rest.
4. Avoid pitching on multiple teams with overlapping seasons.
5. Learn good throwing mechanics as soon as possible. The first steps should be to learn, in order: 1) basic throwing, 2) fastball pitching, 3) change-up pitching.
6. Avoid using radar guns.
7. A pitcher should not also be a catcher for his team. The pitcher-catcher combination results in many throws and may increase the risk of injury.
8. If a pitcher complains of pain in his elbow or shoulder, get an evaluation from a sports medicine physician.
9. Inspire youth pitchers to have fun playing baseball and other sports. Participation and enjoyment of various physical activities will increase the youth’s athleticism and interest in sports.

Most of the list is totally reasonable, but I strongly disagree with some of the points made in this list. Here is how I approach training youth pitchers (13+ years old):

1. Very little – if any – pitching off a mound during the winter months. Completely avoiding pitching off a mound for 4+ months is strongly preferred.
2. Pitchers should be on a regimented and structured throwing program year-round, including winter training. Pitchers should prioritize deceleration training in the off-season.
3. If pitchers want to take time off from throwing, it should be for psychological reasons, not for any perceived physical benefit. Time off should not exceed four weeks.
4. The intelligent use of radar guns to track progress and to diagnose mechanical flaws with weighted baseballs is encouraged.

Yes, I advocate that pitchers should throw year-round. Sound the alarm! Even Eric Cressey says that pitchers should not throw year-round. Like him, I don’t particularly care what people think about my views on this, because I have also done a fair bit of research and experimentation in this regard. Eric makes a point that doesn’t make a lot of sense when he says:

Can you imagine if some clown trying to improve his bench press went out and benched an additional 4-5 times a week on top of his regular strength and conditioning program?

Well, I can. This is more or less the description of how the Bulgarians train Olympic weightlifters – with increasing intensity that has them training competition lifts every single day.

Coaches argue that rotator cuff instability and deceleration training needs to be prioritized, but these things can be managed in a training/weight room with a properly-designed training program. Manually fighting glenohumeral-internal rotation deficit disorder (GIRD) can be done through IR manual stretches, passive ER work, and specific throwing exercises made to strengthen the posterior muscles of the shoulder. (This is something the NPA has finally come around on with their Velocity program – they cite professional tennis as the inspiration for the deceleration training, but give credit where it’s due; Dr. Mike Marshall has been advocating this kind of training for decades. I will also be crucified for pointing this out, I’m sure, but the truth is the truth, regardless of how controversial it is.)

Dr. Marshall Wrist Weight Exercises

Understanding your population

Pitchers who throw abnormally hard for their age need to be treated differently than pitchers who are behind on the developmental curve. This is but one of many factors that no one takes into account when applying a blanket statement like “pitchers need to take four months off.” Here’s an example: I have a pitcher who is 18 years old and is currently a senior in high school. He is sitting in the high-80’s but has the body and frame of someone who could easily be in the low-to-mid 90’s. He has no standing college offers due to picking up pitching late in life. Are you going to tell me that this pitcher should simply take four months off and resume pitching in February, where he’ll take four weeks to regain a decent level of fitness and come out throwing in front of scouts at 86-88 MPH?

Get real. This type of advice is absolute trash for people who are at a major inflection point in their careers. If I took a hands-off approach with that kid and had him shelve throwing until his HS season, he’d be unprepared and would come out rusty with diminished velocity. That is unforgivable.

There is a way to properly train him to further shield him from injury AND increase his levels of performance that will get him noticed.

On the other hand, there are kids who are throwing very hard for their age. Should they be on an aggressive velocity development program? No, probably not. They need different attention in the weight room and training table.

We count pitches and tell kids to stop throwing over the winter because it sounds reasonable. But even advice that makes sense from a training perspective like “pitchers need to lose external rotation to gain anterior stability” has no direct backing when it comes to training pitchers. It describes a set of symptoms that occur, but if a pitcher has terrible dynamic external rotation, then it doesn’t help to take months off.

Additionally, the idea that pitchers can simply pick up a baseball after four months of non-throwing and regain their skill within a few weeks is just stupid. Like anything else, if you aren’t actively developing extremely fine motor control (which is what throwing is), you’re losing kinesthetic sense and ability. Period.

The real reason people tell kids to stop throwing for months on end is because no one has any idea what “ideal throwing mechanics” even are. Did you know even the most sophisticated motion capture analysis systems that use inverse dynamics to estimate kinetic loads on the joints have upwards of a 10-12% error between lab results and real game results when it comes to ball velocity and other performance markers? Meaning that all the advice for “ideal mechanics” are based on a completely different set of data that may not accurately model reality?

Mocap Markers

Looks cool, but doesn’t map to reality.

Great advice for professionals, terrible advice for amateurs

Yeah, Justin Verlander and Felix Hernandez should probably take plenty of time off in the off-season because they threw 200+ innings, plus tons of side work, plus their legendary training programs, plus spring training, plus… well, you get the point. However, you aren’t Justin Verlander.

Justin Verlander

Is this you? I thought not.

However, amateur pitchers have numerous mechanical flaws, lack of fitness in their pitching arm, and throw maybe 40-50 innings per year. There is plenty left in the tank for them to hit the weights hard and throw a few times per week to improve throwing mechanics, proprioceptive sense, and body awareness.

Throwing programs aren’t all equal

In our MaxVelo training programs, pitchers are doing tons of different “throwing” work – including crow-hop step throws with weighted baseballs, kneeling pronated throws with 2-3 lb. baseballs, walking windups, and so forth. They aren’t simply picking up a bucket of baseballs and throwing them at maximum intensity into a net for no reason. Using specific implements like wrist weights and weighted baseballs can be used to train the muscles in the forearm and posterior shoulder without imposing a large valgus stress on the elbow, which will increase the fitness of the pitching arm, increase release velocity, and protect the arm against future injury and fatigue. Yeah, a year-round throwing program when combined with an intelligent flexibility/mobility/stability program actually does all of those things.

The idea that injury and performance lay on two ends of a scale is antiquated and has no scientific basis.

Yes, having a coach who has no idea how to train for deceleration in the pitching arm, treat symptoms of fatigue well, and manage a pitcher’s workload in the off-season can definitely hurt a kid’s arm. It’s irresponsible to have a kid throw recklessly in the off-season with no plan; I totally agree. However, the idea that you will get better at throwing a baseball by not throwing a baseball is insane. It’s like saying you will get better at doing pull-ups by not doing pull-ups, or you will become a great writer if you just stopped writing for a few months out of the year (watch out for repetitive stress injuries).

It is possible to throw year-round and improve. Just ask this kid who threw four times per week in the off-season with weighted baseballs (oh no) and went from 77 MPH to 90 MPH in five months.

Ask him if he should have taken four months off instead.

Learn to Build Smart, Year-Round Training Programs

Hacking the Kinetic Chain walks you through how to improve pitchers smartly. Get the first chapter free!

100% private, no spam.

Phil Rosengren

Great article, Kyle, and nice job having the guts to write it. I was actually just discussing this subject with someone yesterday. Totally agree that under-training is huge factor in arm injuries and it get’s way too little attention when compared to over-use. However, given the amount of games and innings kids pitch these days (sometime spring, summer, fall ball, multiple teams, showcases, etc.) I do disagree somewhat about kids not needing to take some time off from throwing. I think Cressey actually makes some great points on this topic, specifically regarding the need for the arm to have time to repair itself after a long season. I pitched in college and the minors, and I know personally that despite all my best efforts my cuff was always weaker at the end of a long season. Don’t get me wrong, I think taking 4 months off from throwing for most kids is ludicrous if they’re really looking to improve (the off-season are where gains are made). But I do see some benefit to giving the arm a rest for a month or so to allow it to repair and be ready to then start preparing for the next season. Again, refreshing to see someone thinking outside the box and putting the emphasis where it needs to be – preparing to pitch! Keep up the great work!


If a kid is pitching (not throwing) in a lot of showcases and stuff, I can understand taking time off for psychological reasons. Maybe 2-3 weeks.

Thanks for the comment!

Phil Tognetti

Kyle, excellent article. I agree that understanding your population is a huge component to any training program. Coaches need to get off the one-size fits all approach and take a look at the individual they are working with.

Been reading a few of your articles lately and I like your approach. Looking forward to more.

Baseball Stuff You Should Be Read: 11/16/12 | The Full Windup

[…] Overuse is Not the Problem: Undertraining is the Devil: This article is from Kyle Boddy over at Driveline Baseball. It’s an interesting read on training pitchers – from weighted baseballs to whether or not to take time off from throwing. Kyle makes the case that pitching injuries are the result of kids being undertrained, not overused. Give the article a read and decide for yourself. […]


Kyle, great article. I strongly agree that each player requires individual detail based on their weaknesses. I typically find muscular deviations spread across the body, especially in such a explosive move like pitching or hitting. I’d love to share with you a versatile tool we’ve developed for coaches/trainers to correct movement issues for players with unlimited possibilities.

Here’s a glimpse of what we do for baseball: http://youtu.be/jv84m5uJ60k

Stay Well!


Kyle thanks for the article. I enjoyed reading a different perspective on this topic.

I feel that taking some time off from throwing is a wise decision for many athletes because it allows them to prioritize strength gains which have a much larger window of adaptation at the end of a long season compared to the sport specific activities they have been practicing all season.

Overuse is Not the Problem: Under-training is the Devil | Prodigy Baseball Academy

[…] For the complete post see:


Kyle, do you have any sources or support for ” the idea that pitchers can simply pick up a baseball after four months of non-throwing and regain their skill within a few weeks is just stupid” besides the argument that it is “just stupid”? Have you actually tested this on any subjects? Or are you just assuming it can not be done? I also believe that Eric Cressey was advocating against throwing in live competition. All of his articles talk about kids PLAYING year round and kids PLAYING on multiple teams. Nowhere does he argue that you shouldn’t pick up a baseball at all for four months. You can still play catch and throw bullpens along with your strength training program.

Leave a reply