Sports Sciences Commons^™

Central Vs. Peripheral Vision During A Singe-Leg Drop Jump: Implications Of Dynamics And Patellofemoral Joint Stress, Junyoung Ko, Kyeongtak Song, Hoon Kim, Sae Yong Lee, Jihong Park

Athletic Training and Clinical Nutrition Faculty Publications

Landing on a single-leg without receiving direct visual information (e.g., not looking at the ground) may increase the risk of injury. We examined whether visual focus contributed to the changing lower-extremity dynamics and patellofemoral joint stress during a single-leg drop jump task. Twenty healthy volunteers visited the laboratory for three separate sessions. During each session, participants randomly performed either of two types of a single-leg drop jump task from a 30 cm high wooden box. Subsequently, participants looked at the landing spot (central vision condition) or kept their heads up (peripheral vision condition) when performing the task. Sagittal and frontal …

What Have We Learnt From Quantitative Case Reports Of Acute Lateral Ankle Sprains Injuries And Episodes Of 'Giving-Way' Of The Ankle Joint, And What Shall We Further Investigate?, Filip Gertz Lysdal, Yuehang Wang, Eamonn Delahunt, Dominic Gehring, Kyle B. Kosik, Tron Krosshaug, Yumeng Li, Kam-Ming Mok, Kati Pasanen, Alexandria Remus, Masafumi Terada, Daniel T. P. Fong

Athletic Training and Clinical Nutrition Faculty Publications

Lateral ankle sprains are a commonly incurred injury in sports. They have a high recurrence rate and can lead to the development of persistent injury associated symptoms. We performed a quantitative synthesis of published case reports documenting the kinematics of acute lateral ankle sprains and episodes of ‘giving-way’ of the ankle joint to provide a comprehensive description of the mechanisms. A systematic literature search was conducted to screen records within MEDLINE® and EMBASE®. Additional strategies included manual search of specific journals, as well as contacting researchers in relevant communities to retrieve unpublished data. Twenty-four cases were included in the quantitative …

Reactive Oxygen Species (Ros) And Antioxidants As Immunomodulators In Exercise: Implications For Heme Oxygenase And Bilirubin, David Travis Thomas, Nicholas R. Delcimmuto, Kyle D. Flack, David E. Stec, Terry D. Hinds Jr.

Athletic Training and Clinical Nutrition Faculty Publications

Exercise is commonly prescribed as a lifestyle treatment for chronic metabolic diseases as it functions as an insulin sensitizer, cardio-protectant, and essential lifestyle tool for effective weight maintenance. Exercise boosts the production of reactive oxygen species (ROS) and subsequent transient oxidative damage, which also upregulates counterbalancing endogenous antioxidants to protect from ROS-induced damage and inflammation. Exercise elevates heme oxygenase-1 (HO-1) and biliverdin reductase A (BVRA) expression as built-in protective mechanisms, which produce the most potent antioxidant, bilirubin. Together, these mitigate inflammation and adiposity. Moderately raising plasma bilirubin protects in two ways: (1) via its antioxidant capacity to reduce ROS and …

Combined Driving: Task-Specific Position Impacts Grip Strength Of Equestrian Athletes, Michaela M. Keener, Kimberly I. Tumlin, Nicholas R. Heebner

Athletic Training and Clinical Nutrition Faculty Publications

BACKGROUND: Loss of hand strength is a predictor of mortality in aging populations. Despite reliance on the hands to participate in equestrian driving activity, no existing studies focus on associations of hand strength to athletic performance. Therefore, this study 1) established baseline handgrip of equestrian combined drivers in standing and task-specific positions, 2) determined endurance of task-specific handgrip, 3) compared handgrip strength to normative data, and 4) evaluated associations of handgrip and equestrian-specific variables.

METHODS: There were 51 combined drivers (9 males, 42 females) ages 21-78 who completed a survey, standing handgrip, and grip strength and endurance in a task-specific …

Hindlimb Suspension In Wistar Rats: Sex-Based Differences In Muscle Response, Marie Mortreux, Megan E. Rosa-Caldwell, Ian D. Stiehl, Dong-Min Sung, Nicholas T. Thomas, Christopher S. Fry, Seward B. Rutkove

Athletic Training and Clinical Nutrition Faculty Publications

Ground-based animal models have been used extensively to understand the effects of microgravity on various physiological systems. Among them, hindlimb suspension (HLS), developed in 1979 in rats, remains the gold-standard and allows researchers to study the consequences of total unloading of the hind limbs while inducing a cephalic fluid shift. While this model has already brought valuable insights to space biology, few studies have directly compared functional decrements in the muscles of males and females during HLS. We exposed 28 adult Wistar rats (14 males and 14 females) to 14 days of HLS or normal loading (NL) to better assess …

Reliability And Validity Of A Clinical Assessment Tool For Measuring Scapular Motion In All 3 Anatomical Planes, Oliver A. Silverson, Nicole G. Cascia, Carolyn M. Hettrich, Nicholas R. Heebner, Timothy L. Uhl

Athletic Training and Clinical Nutrition Faculty Publications

CONTEXT: A single clinical assessment device that objectively measures scapular motion in each anatomical plane is not currently available. The development of a novel electric goniometer affords the ability to quantify scapular motion in all three anatomical planes.

OBJECTIVE: Investigate the reliability and validity of an electric goniometer to measure scapular motion in each anatomical plane during arm elevation.

DESIGN: Cross-sectional.

SETTING: Laboratory setting.

PATIENTS OR OTHER PARTICIPANTS: Sixty participants (29 females, 31 males) were recruited from the general population.

INTERVENTION(S): An electric goniometer was used to record clinical measurements of scapular position at rest and total arc of motion …

Corticospinal Activity During A Single-Leg Stance In People With Chronic Ankle Instability, Masafumi Terada, Kyle B. Kosik, Ryan S. Mccann, Colin Drinkard, Phillip A. Gribble

Athletic Training and Clinical Nutrition Faculty Publications

PURPOSE: The aim of the study was to determine whether corticospinal excitability and inhibition of the tibialis anterior during single-leg standing differs among individuals with chronic ankle instability (CAI), lateral ankle sprain copers, and healthy controls.

METHODS: Twenty-three participants with CAI, 23 lateral ankle sprain copers, and 24 healthy control participants volunteered. Active motor threshold (AMT), normalized motor-evoked potential (MEP), and cortical silent period (CSP) were evaluated by transcranial magnetic stimulation while participants performed a single-leg standing task.

RESULTS: Participants with CAI had significantly longer CSP at 100% of AMT and lower normalized MEP at 120% of AMT compared to …