Aaron Wellman
Michigan Football Director of Strength & Conditioning

Aaron Wellman is in his fourth year at Michigan as the football team's strength and conditioning coach. He came to Ann Arbor after spending two years at San Diego State and five years at Ball State with Brady Hoke.

Wellman has 18 years of experience at the Division I collegiate level, including seven years in the Big Ten Conference. A safety at Division III Manchester College in Indiana, Wellman began his career as a graduate assistant at Indiana University, where he earned his master's degree in 1998. He spent three years as an assistant strength and conditioning coach for the Hoosiers and was primarily involved with the football, baseball and softball teams, as well as developing individual nutrition programs for student-athletes.

At Michigan State, Wellman was involved with all aspects of the strength and conditioning program for the football team, and assisted with men's and women's basketball and ice hockey.

A member of the Collegiate Strength and Conditioning Coaches Association, Wellman is a certified strength and conditioning specialist. He and his wife, Shellie, have a son, Grant, and a daughter, Grace.

Lewis Caralla
Assistant Strength & Conditioning Coach

Lewis Caralla is in his third year as an assistant strength and conditioning coach at Michigan.  Caralla joins the Michigan football program after serving as an assistant strength and conditioning coach for football at Mississippi State (2011) and Georgia Tech (2010-11).  In addition to assisting with the football program at Georgia Tech, Caralla also served as the head strength and conditioning coach for men's golf.

Prior to Georgia Tech, Caralla was a graduate assistant strength coach at Mississippi State (2009-10), where he assisted with football and the men's and women's tennis and basketball teams.  Caralla's experience also includes stops as an intern at the University of Virginia (2008) and South Florida (2007).

Caralla earned his bachelor's degree in wellness and corporate fitness from Defiance College (Defiance, Ohio), where he was a two-time All-Conference selection at running back. He also was a two-time Academic All-Conference choice.  Caralla received his master's degree in kinesiology from Mississippi State.

A native of Tarpon Springs, Fla., Caralla and his wife, the former Lori Marshall, have one son, Marshall.

Mark Naylor
Assistant Strength & Conditioning Coach

Mark Naylor is in his fourth year as an assistant strength and conditioning coach at Michigan. He previously served as director of Ball State University's football strength and conditioning program from 2009-11, taking over for departed strength and conditioning coach, Aaron Wellman. His previous experience includes stops as a strength and conditioning assistant with the Baltimore Ravens (2006-07) and as a graduate assistant with Ball State (2004-05) and Missouri Southern (2003).

Naylor earned his undergraduate degree from Missouri Southern in 2003 before pursuing his master's at Ball State in 2006.

A native of Broken Arrow, Okla., he and his wife, the former Melissa Obermann, have three children, daughter Macy and sons Matthew and Mason.

Corey Twine
Assistant Strength & Conditioning Coach

Corey Twine is in his fourth season as an assistant strength and conditioning coach with the Michigan football program. He arrives in Ann Arbor after spending three years at West Virginia (2008-10).

Prior to joining the WVU staff, Twine was the astronaut strength and conditioning coach at Wyle Laboratories, Inc. (NASA) at Johnson Space Center in Houston, Texas. He coordinated the physical readiness and assessments for all active astronauts, formulated and implemented programs and consulted with engineers and biomedical staff on exercise hardware issues.

Twine was a graduate assistant strength and conditioning coach at Michigan State for two years (Sept. 2000-Aug. 2002). He worked with Aaron Wellman while in East Lansing. Twine was the head strength and conditioning coach for the Tampa Bay Devil Rays minor league organization in Charleston, S.C., for seven months in 2000 and was a strength and conditioning intern at Penn State from Sept. 1999 to Dec. 1999. He also worked camps with the Philadelphia Eagles, Washington Redskins and Notre Dame.

Twine earned a bachelor’s degree in exercise science from Norfolk State in 2000. He received a master’s degree in kinesiology from Michigan State in 2002.