Long toss can increase arm speed and build the physical capacity for higher velocity, but the relationship isn’t as straightforward as many pitchers assume. Biomechanical studies show that throwing at maximum distance produces measurably faster arm speeds and greater shoulder rotation than pitching from a mound. Whether that translates directly to higher game velocity depends on how you structure the program and what you pair it with.
What Happens to Your Arm During Long Toss
Throwing a baseball is one of the fastest human movements, requiring a precisely timed chain of muscle activations that transfers energy from your legs through your trunk and out through your arm. Long toss amplifies several parts of that chain. As throwing distance increases, so does arm speed. Your shoulder rotates further back before release, your elbow extends faster, and your arm whips through a wider arc. A study from the American Sports Medicine Institute found that pitchers throwing at maximum distance (averaging 260 feet) showed increased shoulder external rotation, faster elbow extension velocity, and greater internal rotation torque compared to their normal pitching mechanics.
Your body also adjusts its posture. At longer distances, your knee stays more extended and your trunk stays more upright at release, sending the ball on a higher arc. This is a different movement pattern than mound pitching, where you drive forward over a bent front leg with more trunk flexion. That distinction matters, because it means long toss trains your arm to move fast but doesn’t perfectly replicate the mechanics you use to pitch.
The Arm Slot Question
One consistent finding across biomechanical research is that long toss lowers a pitcher’s arm slot. When you’re throwing for maximum distance, your body naturally drops the release point to generate a trajectory that carries the ball farther. This decreased arm slot, combined with greater arm rotation, means the throwing pattern at 300 feet looks different from the pattern at 60 feet 6 inches.
This is where the debate gets heated. Critics argue that training a lower arm slot and more upright trunk position could interfere with mound mechanics. Supporters counter that the arm speed gains carry over regardless, and that a proper program accounts for this by including a “pull-down” or compression phase where the pitcher works back in to shorter distances, throwing hard on a line rather than on an arc. That compression phase more closely mimics the flat, downhill trajectory of actual pitching.
What the Velocity Research Actually Shows
Here’s where the evidence gets complicated. While long toss clearly increases arm speed during the long toss itself, controlled studies measuring its effect on pitching velocity from a mound have been less conclusive. One study comparing a long toss program to a weighted ball program found that both improved throwing distance and shoulder range of motion, but neither group showed a statistically significant increase in pitching velocity over the training period.
That doesn’t mean long toss is useless for velocity. It means that arm speed is only one ingredient. Velocity from a mound also depends on stride length, hip-to-shoulder separation, timing, and the ability to direct force efficiently toward home plate. Long toss builds the raw arm speed and shoulder mobility that support higher velocity, but it likely needs to be combined with mound work or other training to convert those gains into actual pitch speed. Think of it as raising your ceiling rather than automatically raising your floor.
How Throwing Distance Relates to Velocity
There’s a rough correlation between how far you can throw and how hard you can pitch, though spin rate introduces significant variability. Using physics-based calculations from baseball researcher Dr. Alan Nathan, the relationship looks approximately like this:
- 300 feet: 77 to 80 mph
- 325 feet: 82 to 85 mph
- 350 feet: 85 to 90 mph
- 375 feet: 90 to 94 mph
- 400 feet: 95 to 99 mph
The range at each distance exists because spin rate affects carry. A high-spin throw (3,000 to 3,500 rpm) stays in the air longer and travels farther at a lower release speed, while a low-spin throw (1,000 to 1,500 rpm) needs more velocity to reach the same distance. So two pitchers who both max out at 350 feet might have meaningfully different mound velocities. Still, if your max distance is increasing over time, it’s a strong signal that your arm speed is improving.
The Stress Tradeoff
The same biomechanical changes that make long toss effective also make it stressful. Maximum-distance throws produce higher torque on both the shoulder and the elbow compared to pitching from a mound. The internal rotation torque on the shoulder increases, the varus stress on the elbow increases, and the deceleration forces required to slow the arm after release are greater. This puts significant demand on the muscles surrounding the shoulder blade and the ligaments stabilizing the elbow.
Flat-ground throws at shorter distances tell a different story. Hard, horizontal throws on flat ground produce biomechanical patterns similar to actual pitching, making them a reasonable training tool with more predictable stress levels. The risk profile changes primarily when pitchers push toward their absolute maximum distance with high effort and an arcing trajectory.
How to Structure a Long Toss Program
Most well-regarded programs break long toss into two phases. The first is an extension phase, where you gradually increase distance with your throwing partner. The goal here is warming up, loosening the arm, and building toward your working distance with submaximal effort. This is not the velocity-building portion.
The second phase is compression, where you work back in toward your partner, closing the gap 5 to 10 feet per throw while putting the ball on a line with high intent. This is the phase that most directly builds arm speed in a pattern transferable to pitching, because you’re throwing hard and flat rather than high and arched.
Pitching coach Tom House recommends capping maximum-effort long toss at five sets of 15 throws (75 total) and placing it primarily in the offseason during endurance-building phases. During the season, the approach scales back. Professional pitchers who use long toss year-round typically shorten their distances and reduce volume to manage fatigue. One common in-season approach is stretching out to around 250 feet, then progressively working back in before transitioning to mound work.
If you’re limited on space, you can still get value from the program. Throwing weighted balls out to 90 feet before switching to a regular baseball for the rest of your session is one adaptation. Another is simply putting the ball on a line repeatedly from 120 feet with high intent, focusing on the compression-style throws that carry over most directly to pitching.
Where Long Toss Fits in a Bigger Picture
Long toss is best understood as one piece of a velocity development puzzle, not the whole thing. It builds arm speed, increases shoulder range of motion, and conditions the muscles involved in high-effort throwing. But the research suggests these adaptations don’t automatically show up as faster pitches without complementary training. Mound work, strength training, and for some pitchers, weighted ball programs all contribute to converting raw arm speed into usable velocity.
The pitchers who gain the most from long toss tend to be those who use it consistently over months, pair it with a structured compression phase, and treat it as a progressive overload tool rather than a casual warm-up. If your max distance is 280 feet today and you build it to 340 feet over an offseason while maintaining clean mechanics on the mound, you’ve almost certainly given yourself a higher velocity ceiling to work with.