We transform driven people into unstoppable athletes.

Expect rigorous training, science-backed programming, and relentless accountability. We crush plateaus with precision coaching and performance tech. Every session is engineered to unlock raw power and explosive speed. Join the squad built to dominate.

CEO and Founder: Jathan Mahaffey ~ J.M. Speed and performance:

A year ago, Jathan faced some of the toughest challenges of his life. During that difficult period, he realized the importance of perseverance and hard work. Whether it was pouring rain or blazing sunshine, he stayed dedicated to his training and kept pushing himself to improve.

Motivated by the transformative power of support and determination, Jathan wanted to pay that forward. He decided to help others overcome their own obstacles and reach their athletic potential. That’s how J.M. Speed and Performance was born—a business dedicated to empowering athletes through dedication, encouragement, and expert guidance, inspired by Jathan’s own journey of resilience.

Jathan Mahaffey is a former collegiate lacrosse attacker whose playing career was built on speed, toughness, and a strong offensive skill set. A native of Millersville, Maryland, Mahaffey competed at both Wesley College and York College of Pennsylvania, where he earned recognition as a reliable attacker with a high work rate and a team-first mentality. Prior to college, he was a multi-sport athlete at Annapolis Area Christian School, excelling in both lacrosse and varsity football. During his collegiate career, he recorded multiple multi-goal performances while contributing as a scorer, playmaker, and ground-ball competitor. Today, Mahaffey brings the same dedication, athleticism, and passion for player development to his lacrosse training and performance coaching.

Core Training Pillars:

Lacrosse-Specific Speed & Agility

Straight-line speed is rarely enough on the lacrosse field. Jathan focuses on multidirectional speed, linear acceleration, and explosive deceleration. Athletes learn the mechanics of the first three steps to blow past defenders or lock down opponents on a re-ride.

Functional Power & Core Stability

Lacrosse requires a balance of lower-body power for driving to the net and core stability for rotational shooting power. Programs are designed to build a strong athletic base that increases shot velocity and allows players to absorb contact without losing balance.

Multi-Directional Change of Direction (COD)

Dodging and cutting require elite ankle stability and hip mobility. Jathan teaches proper foot placement and low center-of-gravity transitions, reducing the risk of non-contact injuries while making an athlete's cuts sharper and harder to defend.

Lacrosse Conditioning & Endurance

Lacrosse is a sport of repeated sprints. Training simulates game-like energy systems so that athletes can execute complex stick skills and explosive cuts even when fatigued late in a game.