The Immediate and 24-hour Effects of Body Tempering Versus Foam Rolling on Lower Extremity Muscular Power During the Vertical Jump and Standing Long Jump Tests

All procedures will take place on the first floor of the Solomon Blatt Physical Education Center in Lab Rooms 104, 105, 108, the first-floor hallway, and the first floor stairwell. Data collection will be performed in the fall 2024 and spring 2025, data analysis will be performed in the fall of the same year, and research defense will be performed in the fall of the same year. Participants will be assigned to either a body tempering or self-myofascial release (SMR) group via simple randomization for sex, with at least fifteen participants being placed into each group. Informed consent and IRB approval will be obtained prior to data collection. The group assignment of each participant will be known to the lead investigators who will be a licensed physical therapist and two examiners, one coordinating the warmup and the other performing the intervention. The data collector will remain blind to group assignments. Each participant will be required to sign an informed consent form and will be allowed to opt out of future data collection or to no longer participate in the study at any time, without any negative consequences to the participant, as they will not be receiving any compensation for participation.

Participants, ages 18-39, will be recruited via word-of-mouth, flier, and email on the University of South Carolina campus. Prior to the intervention's application, each subject will sign an informed consent form after a proper explanation by the primary investigator of the study's intent and the possibility of injury. To ensure the safety of the participants, each participant will be required to fill out a participant information form to screen for possible contraindications which include the following: history of knee or hip injury, hypertension, thrombophlebitis, inflammation, myositis ossificans, osteomyelitis, open wounds, unhealed fractures, hematoma, hemophilia, pregnancy, cancer, burns or skin grafts, varicose veins, synovitis, currently taking any anticoagulation medications, rheumatoid arthritis, osteoporosis or any other condition that would prevent subject participation. Once completed, the primary investigator will review each subject form and make the final decision as to include or exclude the individual(s) from the study. Lastly, to preserve subject privacy, each subject will be assigned a participant number to be used for reference during data entry and analysis.

Included in all announcements, fliers and emails, participants will be informed that they need to wear athletic attire to be included in the study. If the participants are unable to wear the required attire, they will be provided with a pair of paper shorts which can be disposed of after their participation in the 24-hour retest has concluded.

After it has been determined that the participant meets the eligibility criteria, the participant will be instructed to perform a standardized warm-up to limit variability among their physical readiness to participate. The warm-up will include a three-minute jog at 50% of their perceived maximum exertion, five seconds of high knees (hip flexion to ~90 degrees) at 50% of their perceived maximum exertion, and five seconds of butt-kicks (maximal knee flexion) at 50% of their perceived maximum exertion. After completing the warm-up, the participant will be instructed to rest for two minutes to decrease any accumulated fatigue. After the allotted two minutes of rest, participants will then move to take baseline measurements on the vertical jump and broad jump respectively with an investigator (AC) present to perform measurements. After performing baseline measurements, participants will return to Blatt PE Center Room 104 to be randomly allocated into intervention group by the investigator performing intake.

For the intervention group, the participant will be positioned in the prone position on the Body Tempering Ab Mat, purchased from https://roguefitness.com, with their feet hanging off the end of the mat. The body tempering intervention will be applied by the same investigator for all trials. The body tempering device will be applied dynamically to each participant for four minutes, with the device placed on both participants' lower extremities at the same time. First, the examiner will set a timer for two minutes and begin rolling one 80-pound body tempering device along the participant's gastrocnemius-soleus complex at a rate of 30 beats per minute, as indicated by the Pro Metronome iPhone© Version 4.2 application, traveling from the Achilles tendon (medial malleolus) to the inferior aspect of the popliteal fossa, indicated by fibular head. The participant will then take thirty seconds to transition to a supine position as indicated for dynamic tempering along bilateral quadriceps in the Body Tempering™ Course Manual. The examiner will place the 80-pound body tempering device along participants' middle to distal quadriceps, set a timer for 2 minutes, and dynamically temper from one hand width (as measured by the participants hand width) distal to the hip crease to just proximal to the most superior aspect of the patella at a rate of 30 beats per minute.