DEVELOPMENT OF AN ECCENTRIC CYCLING PARADIGM TO PRODUCE

DELAYED ONSET MUSCLE SORENESSFredrick Peters1, Sara Harper1, John McDaniel1, Angela L. Ridgel1

Presented by: Fredrick Peters

Background

• Delayed onset muscle soreness (DOMS) - sensation of pain in the skeletal muscles following eccentric physical activity (Kedlaya, 2014).

• Results in: (Cheung et al., 2003, Baird et al, 2001)– Reduced blood supply– Pain and inflammation– Increased creatine kinase (CK) activity– Muscle weakness – Decline of range of motion (ROM)

Purpose

• The main objective of this investigation is to determine if a customized eccentric cycling paradigm can be used to produce symptoms of DOMS.

Eccentric Paradigm

• This paradigm consists of forward resistance to backward pedal motion on a motorized cycle

Methods

Eleven recreationally active men (18 - 40 years old) completed five minutes of eccentric cycling.

Measurements taken at four time points:•T0 – Friday (baseline)•T1 – Monday (Eccentric cycling) •T2 - Tuesday (24 hours post-cycling)•T3 – Wednesday (48 hours post-cycling)

Results - CK

The CK levels increased T1 – T2

Results - Lactate

The Lactate levels increased T1- pre to T1-post

Results - Likert

• Pain scores increased T1 – T2

• Significant effect of time

Conclusions / Future Direction

• Eccentric cycling paradigm elicits increases in CK and pain scores that peaked between 24-48 hours post-cycling.

• Lactate peaked immediately after eccentric cycling.

• Findings suggest that this eccentric cycling paradigm can be used to elicit markers of DOMS in just five minutes.

• Future studies will use this paradigm to examine the effects of segmental vibration therapy (or other therapies) on recovery from DOMS

• Dr. Ellen Glickman• Dana Kiger• Keith Burns• Sara Harper• Brandon Pollock• Matthew Kahl, Clare Heisey, Megan Mihalik, Chelsea Richards, Seth Scrimo,

Molly Zeigler, Elizabeth Akosile, Rachel Reichlin, Nichole Catalano Brittney Carozza, Anna Lombardo, Cassandra Gubernath, Ana Fantini, Theresa Rios Jenna Boyle, Jay Jonas, Kalyn Renner, Brennen Hartung

Acknowledgements: