Baseball player sprinting during a game

Why High School Pitchers Must Train In-Season

October 10, 20252 min read

Why High School Pitchers Must Train In-Season - Lewis Physical Therapy & Sports Rehab

When most high school pitchers think about training, they focus heavily on the off-season. They lift heavy, sprint hard, and make big gains from November through January. But once the season begins, many players back off training altogether — and that’s a major mistake.

What you’ll learn in this blog:

  • Why pitchers need to train at least twice per week in-season

  • How to structure off-season, pre-season, and in-season training

  • What happens if you stop training mid-season

  • The best ways to combine lifting, sprinting, mobility, and recovery

🎥 Watch the full breakdown on YouTube here:

🚨 The Problem With Backing Off Training

Many pitchers believe they should only lift hard in the off-season and then completely back off once the season begins. The problem is, when you stop training, you start detrain­ing. Velocity drops, recovery time increases, and nagging shoulder, elbow, or low back pain creeps in. By the time summer tournaments arrive, performance is already declining.

📅 A Year-Round Training Framework

A complete program should include:

  • Off-season (Nov–Jan): Work capacity → accumulation/submaximal lifting → maximal strength blocks

  • Pre-season (Feb–Mar): Submaximal strength with higher sprint intensity, then max strength peaking before games

  • In-season: Twice-per-week lifting at 75–90% of max, reduced volume, sprinting and plyos at high-intensity/lower frequency, mobility, recovery, and arm care

  • Post-season: Deload + reassessment before the next off-season

🏋️ Why In-Season Training Matters

Even training just twice per week helps pitchers:

  • Maintain velocity

  • Recover faster from outings

  • Prevent breakdowns in shoulder and elbow health

  • Keep power and explosiveness sharp throughout playoffs

Skipping training means starting over every off-season. For serious pitchers with college or pro aspirations, year-round training is non-negotiable.


📅 Ready to Throw Pain-Free?

Struggling with throwing pain? Don’t let it hold you back.
👉 Text “Arm Pain” to 732-724-1381 to schedule your discovery call and get your FREE copy of The Arm Pain Blueprint.

💪 Worried that Poor Throwing Mechanics Are Causing Your Arm Pain?


Struggling with your mechanics? Learn the common throwing mistakes I see and how to correct them.
👉 Text “Blueprint” to 732-724-1381 to schedule your discovery call and get your FREE copy of The Pitcher’s Mechanical Blueprint.

🎙 Listen to This Episode on The Lewis Physical Therapy & Sports Rehab Podcast

Catch the full breakdown of why in-season training is critical for high school pitchers.

🎧 Listen on Spotify: https://open.spotify.com/show/4A6iBs0CzkAwSu9rUVPfGX?si=lrea2AaWQSy5USIT90KXhQ

⚡ Looking to get stronger, faster & more explosive?


Dominate the mound with the Triple Threat Sprint System — our 10-week plan for building baseball speed & power.
👉 https://www.lewisptsr.com/home-page-673984-4202

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