Let Us Bring Personal Training To You.

Anywhere in Boston and Suburbs.

You won't find a more knowledgeable,  dedicated,  passionate and trustworthy PT than Kyle. I am a professional triathlete who specializes in long course racing. I can’t recommend Kyle highly enough.”

Alice Alberts, Professional Triathelete

Concierge Home Personal Training - Delivered to You.

Things we Train

  • At ONYX, we focus on optimizing body composition by addressing both fat percentage and total muscle mass. Our tailored programs combine evidence-based exercise regimens, nutritional guidance, and lifestyle modifications to create a comprehensive approach to wellness and performance. We utilize assessments to establish baseline metrics and monitor progress, ensuring each individual receives personalized strategies that promote fat loss while encouraging muscle growth. Our emphasis on sustainable practices fosters long-term results, contributing to enhanced overall health and longevity. Each step is designed to empower individuals in achieving their specific body composition goals.

  • At ONYX Physical Therapy, we focus on enhancing cardiorespiratory endurance through targeted training that optimizes VO2max, the maximum amount of oxygen your body can utilize during intense exercise. VO2max is a critical indicator of aerobic fitness and plays a significant role in overall health. Higher levels of VO2max are associated with increased longevity and a prolonged healthspan, meaning individuals can maintain their vitality and functional capacity for longer periods.

    Research shows that improved VO2max can lower the risk of chronic diseases, such as heart disease, diabetes, and metabolic syndromes, by promoting better cardiovascular health and efficient metabolic functioning. By incorporating tailored exercise programs that challenge and elevate your cardiorespiratory system, we aim to help you achieve higher VO2max levels, ultimately leading to enhanced well-being and a reduced risk of disease.

  • At ONYX Physical Therapy, we recognize that strength is a vital predictor of longevity and overall health. Our specialized programs are designed to enhance your strength based on your personal goals and areas of focus. Whether you're aiming to develop upper body power, core stability, or lower body endurance, our tailored approach ensures that you receive the targeted training necessary for optimal results. By improving your strength, you not only enhance your physical performance but also work towards reducing the risk of age-related decline and mortality. Invest in your health today and build a foundation for a longer, stronger future.

  • At ONYX Physical Therapy, we understand that every sport and activity presents unique challenges and demands. Our tailored approach focuses on enhancing your performance while minimizing injury risk specific to your chosen discipline. Through personalized assessments and specialized training programs, we address the physical requirements of various sports, integrating strength, flexibility, and endurance strategies. Our expert team employs evidence-based techniques to optimize your movement patterns and build resilience against injuries, ensuring you can perform at your best safely. Whether you're an athlete or a recreational participant, we are committed to supporting your journey to peak performance.

  • At ONYX Physical Therapy, we understand that flexibility and mobility are essential components of overall health and performance. Our specialized programs focus on tailored assessments and targeted exercises designed to improve range of motion, reduce stiffness, and enhance physical functionality. By incorporating techniques such as dynamic stretching, myofascial release, and controlled movements, we empower individuals to unlock their body's potential. Whether you're an athlete aiming for peak performance or someone seeking to maintain an active lifestyle, our expert guidance and innovative approach ensure that you achieve greater flexibility and mobility safely and effectively. Experience the difference with ONYX and move freely in every aspect of your life.

Meet Your Trainers

Kyle Mahoney PT, DPT

Doctor of Physical Therapy

Certified Strength and Conditioning Specialist


Brian Clifford DPT, OCS, CSCS

Doctor of Physical Therapy

Physical Therapist II

Primary Spine Practitioner


Why choose ONYX?

We Teach At Local Universities and Health Science Schools

Choosing a physical therapist who teaches at a Doctor of Physical Therapy (DPT) school ensures you're receiving care from someone at the forefront of the field. We instruct at Massachusetts General Hospital Institute of Health Professions, and Northeastern University Bouvé College of Health Sciences. Our role in educating future clinicians reflects a deep understanding of best practices and a commitment to high standards of care. This expertise leads to the most precise assessments, innovative treatment strategies, and better long-term outcomes.

We Specialize in Sports and Orthopedic Physical Therapy

Our home therapists are experts in sports and orthopedic care, combining deep clinical knowledge with real-world experience. We’ve worked with weekend warriors, surgical recoveries, and elite performers, delivering precision care where it matters most—your home. We don’t just follow best practices; we teach them. Our therapists train the next generation and stay current by contributing to research and speaking at top conferences. Choosing ONYX means getting care from professionals who understand movement, pain, and performance on a level few others do.

We are Dual-Credentialed as Strength and Conditioning Coaches

Choosing a physical therapist who is also a Certified Strength and Conditioning Specialist (CSCS) ensures a unique blend of rehabilitation and performance expertise. This dual qualification allows the therapist to not only address injuries but also design strength and conditioning programs that enhance overall physical performance and long term health optimization. They understand how to safely progress clients from rehabilitation to peak athletic function, bridging the gap between recovery and high-level activity. This approach is especially valuable for athletes and active individuals seeking to return to sport stronger and more resilient.

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What clients say about ONYX