Research Shows Limber Digital Health Solution Effective for Remote Monitoring of Home-Exercise Programs. Read more

Meet Our Team

We are an incredibly passionate group of leaders, doctors, innovators, and experts in value-based care, technology, healthcare, orthopedics, physical therapy, sports medicine, and data analytics.

Our team is focused on making science-driven, engaging, and easy-to-follow exercise therapy as widely accessible as possible, and empowering individuals with musculoskeletal conditions to achieve long-term functional well-being.


Michael Gruner

Chief Executive Officer

Previously with Accenture, overcame chronic back injury

Marc Gruner

Chief Medical Officer

Mayo Clinic-trained Sports Medicine Physician, MBA

Ramon Castro

Chief Technology Officer

Experienced CTO in digital health, 10+ years of technology leadership

Nirav Modi

Chief Operating Officer

Experienced healthcare executive, 20+ years background in technology, product, and operational excellence

Jake Grundstein, PT, DPT, MS, MBA

Vice President, Clinical Operations & Value-Based Care

Previously with Hospital for Special Surgery (HSS), MS in Health Care Transformation at UT Austin

Rob Lyles, PT, DPT, SCS, CSCS

Vice President, Physical Therapy

Doctor of Physical Therapy, Board-Certified Sports Clinical Specialist

Josie Andino

Director, Business Development

Strategic Partnerships

April Neukam, PT, DPT

Clinical Operations and Business Development

Doctor of Physical Therapy

Evan Kuhl, PT, DPT

Manager, Clinical Operations and Client Success

Doctor of Physical Therapy


Scott Serota

Former President and CEO of BlueCross BlueShield Association

Rick Gawenda, PT

Leader in PT & OT billing and compliance, Physical Therapist with 30+ years experience

Lili Brillstein

Previously led Value-Based Care Programs at Horizon Blue Cross Blue Shield

Fiona Gathright

Former CEO of Wellness Corporate Solutions

Benjaimin Pugh

Previously Healthcare Actuary at McKinsey & Company

Joseph Giles

Former President of Third Largest Physical Therapy Group in the U.S.

Nathan Hogaboom

Research Scientist at Kessler Foundation at the Centers for Spinal Cord Injury Research and Outcomes & Assessment Research

Dr. Bashir Zikria

Orthopaedic Surgeon at Johns Hopkins Medicine

Robert Longyear

Remote Patient Monitoring Expert, Author of “A Virtual Care Blueprint”