Browsing by Subject "exercise"
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Item AEROBIC AND RESISTANCE EXERCISE PROTOCOLS FOR OVERWEIGHT AND OBESE CHILDREN: A SYSTEMATIC REVIEWEstrada, Martin Salmon; Ko, MansooBackground: In recent times, the prevalence of childhood obesity has been increasing in the United States. Obese individuals have been shown to be at an increased risk for developing health complications such as metabolic syndrome, type 2 diabetes (T2DM), and other cardiovascular disorders. Exercise is one of the methods used to prevent and treat obesity. Current exercise recommendations from the U.S. Department of Health and Human Services (USDDHS) and the American College of Sports Medicine (ACSM) are directed to healthy children or obese adults. However, they do not provide detailed exercise recommendations for overweight or obese children. This review derives aerobic and resistance exercise protocols for children with a body mass index (BMI) ≥25 from studies that have administered exercise prescriptions to overweight and obese children. Methods: A systematic review using PubMed, CINAHL, MEDLINE, PEDro, and Cochrane databases was performed. Search terms used were combinations of: obese, overweight, children, adolescent, exercise, aerobic, and resistance. Quality assessment of articles was performed using the PEDro assessment tool. Results: The primary search strategy yielded 10 studies for inclusion in this review. Seven studies utilized aerobic interventions and 3 utilized resistance interventions. The aerobic exercise protocol was derived by calculating the means of exercise parameters from the 7 aerobic studies. The resultant aerobic exercise protocol consisted of 47.1 minutes per session, 4 times per week at an intensity of 61.9% VO2 max or at least 150 bpm utilizing aerobic exercise equipment or aerobic games for at least 11.9 weeks. The resistance exercise protocol was derived by calculating the means of exercise parameters from the 3 resistance studies The resistance exercise protocol resulted in 2 sets of 10 repetitions at 72.5% of the subjects 1 repetition max 2.3 times per week. A mean of 8 exercises were performed per session focusing on both lower and upper body exercises for 12 weeks. Conclusion: Each exercise protocol was derived from studies that showed significant improvements in risk factors associated with metabolic syndrome, T2DM, and other cardiovascular diseases. These exercise protocols provide a viable exercise prescription specifically for risk factor reduction in overweight and obese children.Item Comparison of the Efficacy of Popular Weight Loss Programs in Sedentary Overweight Women(2014-08-06) Baetge, ClaireThis study compared the efficacy of the Curves? Complete 90-day Challenge (CC), Weight Watchers? Points Plus (WW), Jenny Craig? At Home (JC), and Nutrisystem? Advance Select? (NS) on weight loss, body composition and/or markers of health and fitness in sedentary overweight women. One hundred thirty-three women (47?11 yr, 86?14 kg, 46?5%, 35.4?6 kg/m2) were randomized into CC (n=29), WW (n=29), JC (n=27), NS (n=28), or control (n=20) for 12-wks. Self-recorded food logs (4-d), International Physical Activity Questionnaires, weight, resting energy expenditure (REE), dual energy x-ray absorptiometry, anthropometrics, and fasting blood samples were obtained at 0, 4, 8, & 12 wks. Peak aerobic capacity and muscular strength were measured at 0 and 12 wks. Data were analyzed by ANOVA or MANOVA with repeated measures. Average energy intake was 1,403?427 kcal/day with no differences among groups. CC was the only group with an increase in protein (0.15?0.30, p=0.039) combined with a reduction in carbohydrate (-0.63?0.95 g/kg/day, p=0.005) intake. CC was the only group with a significant increase in total physical activity (3,801?8,668 MET-min/wk, p=0.012) through week 8. All diet groups experienced a decrease in weight (-4.0?4.2 kg, p<0.001), body mass index (-4.0?2.1 kg/m2, p<0.001), waist circumference (-2.7?5.9, p<0.001), and hip circumference (-3.4?4.4 cm, p<0.001), and all maintained REE (0.09?2.0 kcal/kg/day, p=0.008). CC had the greatest decrease in fat mass (-3.8?4.0 kg, p<0.001) and body fat % (-2.7?3.4%, p<0.001) and was the only group that maintained fat-free mass (-0.19?2.00 kg, p=0.631). All groups, except WW, had a decrease in resting heart (-3.0?9.8 bpm, p<0.001). CC was the only group with a decrease in systolic (-7.6?14.2, p=0.002) and diastolic blood pressure (-3.6?7.3 mmHg, p=0.045). CC had the greatest increase in peak aerobic capacity (2.5?2.9 ml/kg/min, p<0.001) and was the only diet group that increased in lower (15.0?21.9 p=0.001) and upper body (8.7?12.5% p=0.001) strength. CC trended toward a decrease in total cholesterol to HDL-cholesterol ratio (-4.9?11.3%, p=0.053). Though all diet groups lost weight and had improvements in anthropometrics, CC experienced greater improvements in body composition, blood pressure, peak aerobic capacity, and muscular strength and trended toward improvements in blood lipid ratios.Item Design for the Frail Old: Environmental and Perceptual Influences on Corridor Walking Behaviors of Assisted Living Residents(2010-10-12) Lu, ZhipengRegular walking has several physical and psychological benefits for frail older people. However, many residents in long-term care facilities are too sedentary to achieve these benefits. Indoor walking appears to be a feasible way to promote active living among these residents and yet, there is little research that has been done in this regard. The researcher conducted two studies in Central Texas to explore how corridor design features influenced indoor walking behaviors among assisted living residents. In the first study, the researcher carried out six focus groups with 50 assisted living residents, discussing how they perceived the indoor corridor as "walkable." Residents reported that a walkable corridor should be safe, comfortable, and having beautiful/interesting things to see. In the second study, the researcher further examined the relationship between the built environment and walking behaviors among 326 residents from 18 facilities in a major city of Texas. The results indicated that 'perceived looped corridor' and 'number of stories' were significantly associated with residents' frequencies of indoor recreational walking. In addition, the availability and quality of sitting space around mailbox areas influenced the number of "walking to mailbox" trips. This research provides empirical evidence to develop activity-friendly facility design guidelines, and to create environmental interventions to facilitate active lifestyles among long-term care residents.Item Effect of Omega 3 Polyunsaturated Fatty Acids (PUFAs) on Markers of Inflammation in Young Horses in Training(2011-02-22) Lucia, Jessica LaurenSixteen horses (2 to 4 yr; 357 to 439 kg BW) were utilized in a randomized complete block design for a 140 d trial to determine effect of omega 3 PUFAs (n-3) supplementation on markers of inflammation in young horses in training. Horses were fed treatments consisting of a control diet (n = 8) fed at 1% BW (as fed) or a treatment diet (n = 8) of concentrate fed at 0.75% BW (as fed) and 350 g of a marine n-3 supplement formulated to provide 15 g of eicosapentaenoic acid (EPA) and 20 g of docosahexaenoic acid (DHA). Body weight and body condition scores (BCS) were obtained biweekly and concentrate adjusted accordingly. Horses were exercised 5 d/wk by students in an equine training course. Type of activity and duration was monitored, along with heart rate to quantify workload. Exercise protocol was divided into 2 phases: phase I (d 0 to110) consisted of ground work and early training under saddle, and phase II (d 111 to 140) consisted of advance maneuvers and moderate workload. Synovial fluid was obtained from right radial carpal joint by arthrocentesis every 28 d and was analyzed for white blood cell count (WBC), total protein (TP), and specific gravity (SG). Serum concentrations of carboxypeptide type II collagen (CPII) and chondroitin sulfate 846 (CS-846) were analyzed by ELISA kits. Dietary treatment did not affect synovial WBC, TP, or SG. Also, concentrations of WBC and TP also did not differ over time. SG increased over time (P < 0.001) as horses moved from phase I to phase II of the trial. Dietary treatment did not influence concentrations of CPII or CS-846. CS-846 tended to increase over time (P = 0.09) and CPII concentrations also increased (P < 0.001) in response to changes in exercise. Furthermore, all horses gained BW and BCS throughout the trial (P < 0.001), but values were not influenced by treatment. This data indicates further studies are needed to determine the efficacy of n-3 supplementation as a preventative measure against development of osteoarthritis.Item Effects of Dietary Magnesium Status on Indices of Muscular Dysfunction in Exercising Horses(2011-02-22) Kurtz, Cassidy A.Throughout the performance horse industry, the occurance of various muscle disorders is common and can be detrimental to the performance and longevity of equine athletes. Research has revealed effects of diet manipulation, exercise, and electrolyte supplementation on the symptoms and occurrence of disorders like exertional rhabdomyolysis (ER). However, there has been no investigation on effects of Mg on muscle function in horses during exercise. Six Quarter Horse mares were used to study the effects of varying levels of Mg on indices of muscular dysfunction during a standardized exercise test (SET) on a highspeed treadmill. Three rations were used over three 28 d periods: control (Trt 1), low Mg (Trt 2), and high Mg (Trt 3). A baseline SET was conducted prior to day 0 (Trt 0). Blood samples were taken during the SET at rest, immediately post, 1 h, 6 h, and 24 h post exercise for analyses of serum muscle enzymes and Mg concentrations. Heart rates (HR), respiration rates (RR), and rectal temperatures (RT) also were documented. No effect of Trt was observed on HR or RR at any point throughout the SET. Resting RT?s were lowest in Trt 0 (P<0.05). There was no Trt effect on blood lactate (LA) during the SET; however, blood glucose (GLU) at rest in Trt 2 was lower than Trt 0 (P<0.05). Treatment had an effect on both resting serum creatine phosphokinase (CK), as Trt 3 was higher than Trt 0, and the change in CK from rest to 24 h post SET, where Trt 1 exhibited the greatest increase in CK concentration (P<0.05). Serum aspartate aminotransferase (AST) and lactate dehydrogenase (LDH) were not affected by Trt (P>0.05). Serum alkaline phosphatase (AP) at rest and 6 h post exercise was lower in Trt 2 than in Trt 3 (P<0.05). Additionally, serum P was lowest at rest in Trt 0 and highest 6 h post exercise in Trt 3, also varying within each Trt. Average daily intake (ADI) of Mg was higher in Trt 1 and 3 than in Trt 2 (P<0.05). Finally, at rest, immediately post and 24 h post exercise, serum Mg was highest in Trt 3 (P<0.05). Results suggest there is an effect of dietary Mg on serum muscle enzyme and Mg concentrations and potentially, overall performance in the equine athlete.Item Effects of Higher Carbohydrate or Higher Protein Diets with Exercise on Individual Risk Factors of Metabolic Syndrome in Women(2014-03-18) Lockard, BrittanieThe purpose of this analysis was to determine whether following a higher protein (HP) diet for 10-weeks promotes a reduction of MetS and the individual NCEP ATP III MetS risk factors better than a higher carbohydrate (HC) diet, when combined with an exercise program. 633 women (age 46.2?11.4 yrs, height 163?7 cm, weight 92.7?18 kg, BMI 34.8?6 kg/m^(2)) were assigned either a HP or HC diet in conjunction with 30 minutes of circuit-style exercise 3x/wk for 10-weeks. Participants consumed 1,425?355 kcal/day while the HP group (N=371) consumed 1.14?0.5, 1.41?0.7, and 0.63?0.3 g/kg/d CHO, PRO, fat and the HC group (N=292) consumed 0.78?0.3, 2.20?0.7, and 0.60?0.2 g/kg/d. Participants were retrospectively categorized as apparently healthy (N=377) or metabolic syndrome (?3 MetS risk factors, N=286). Body composition, anthropometrics, resting energy expenditure, lipid profiles, markers of glucose homeostasis, and fitness parameters were assessed at 0 and 10 weeks. Data were analyzed using ANOVA or MANOVA for repeated measures. The HP group experienced a greater decrease in scanned mass (HP -3.9?3.5, HC -3.0?3.5 kg, p=0.002), fat mass (HP-3.1?2.7, HC -2.4?2.8 kg, p=0.003), weight (HP -4.3?3.6, HC -3.2?3.4 kg, p<0.001), and body mass index (HP -1.6?1.3, HC -1.2?1.3 kg/m^(2), p<0.001), and tended to experience a greater decrease in waist circumference (HP -4.0?5.7, HC -3.2?5.7 cm, p=0.07). Individuals with MetS experienced greater decreases in weight (AH -3.6?3.4, MS -4.2?3.6 kg, p=0.054), body mass index (AH -1.3?1.3, MS -1.6?1.3 kg/m2, p=0.046), systolic blood pressure (AH -0.5?13.3, MS -5.9?16.0 mmHg, p<0.001), diastolic blood pressure (AH -0.4?8.9, MS -4.1?10.5 mmHg, p<0.001), triglycerides (AH -0.00?0.47, -0.23?0.73 mmol/L, p<0.001), and glucose (AH +0.01?0.73, MS -0.24?1.19 mmol/L, p=0.001) and a trend towards a greater decrease in scanned mass (AH -3.3?3.5, MS -3.8?3.5 kg, p=0.07) and lean mass (AH -0.56?2.0, MS -0.89?2.0 kg, p=0.07). Results indicate that participants following the HP diet experienced more favorable changes in body composition and triglyceride levels, and that participants with MetS have greater room for improving markers of health on a diet and exercise protocol.Item Exercise and Obsessive-Compulsive Symptomatology(Sam Houston State University, 2012-05) Gibbs, Jason M.; ; Nelson, D. V.; Kordinak, S.T.; Glave, A.P.Exercise has been used successfully as a treatment for anxiety and depression. It has been found to have acute and long-term anxiolytic effects and to improve mood in people of various ages, both sexes, and diverse types of settings (e.g., clinical, college, etc.). The evidence for exercise as a treatment for OCD is less well substantiated, with only 3 known small-scale studies addressing it. While preliminary evidence suggests that aerobic exercise leads to reduced symptoms of OCD in subjects, it has not addressed people with subthreshold OC symptoms, effects of anaerobic exercise on OC symptoms or how certain subtypes of OC symptom respond to exercise. In present study university students completed self-report questionnaires in order to address these issues. Higher levels of exercise were correlated with increased levels of positive feeling and higher levels of pathological exercising. However, no correlation between exercise and depression was found. Correlations between exercise and OC scores were few, but the ones present were in the opposite direction from what was predicted, and exercise correlated positively more frequently with certain subtypes of OCD than others.Item Exercise training regulation of extracellular matrix and remodeling in the aging rat heart(2009-05-15) Kwak, Hyo BumAging is characterized by a progressive impairment of cardiac structure and function. The cardiac remodeling involves loss of cardiac myocytes, reactive hypertrophy of the remaining cells, and increased extracellular matrix (ECM) and fibrosis in the aging heart. In contrast, exercise training not only improves cardiac function, but also reduces the risk of heart disease. However, the ability of exercise training to modulate ECM and remodeling in the aging heart remains unknown. Therefore, the purpose of this study was to determine the effects of exercise training on ECM remodeling in the aging heart. We hypothesized that (1) exercise training would attenuate age-related changes in left ventricle morphology including extramyocyte space and collagen contents, and (2) exercise training would ameliorate age-induced changes in ECM-related factors including MMPs, TIMPs, TNF-?, TGF-?1, and ?-SMA in the heart. Three and 31 month old Fischer 344 ? Brown Norway F1 hybrid rats were assigned to four groups: young sedentary (YS), young exercise-trained (YE), old sedentary (OS), and old exercise-trained (OE). Exercise training groups walked briskly on a treadmill for 45 min/day (12? incline) at 20m/min (young) or 10 m/min (old), 5 d/wk for 12 wk. We found that endurance exercise training might ameliorate the ageinduced increase in extramyocyte space and collagen contents of the left ventricle. Exercise training might protect against age-induced fibrosis by increasing MMP-2, MMP-14 in the soluble fraction and MMP-1, MMP-3, MMP-14 in the insoluble fraction of old rat hearts. Conversely, exercise training might reduce the fibrosis by decreasing TIMP-1 in the soluble fraction of old rat hearts. Further, exercise training reduced potential upstream pro-fibrotic mediators including TNF-? and TGF-?1 in the aging rat hearts. These results are the first to demonstrate that exercise training has a protective effect against age-induced extracellular collagen matrix remodeling in the aging heart, associated with increased MMP-1, -2, -3, -14 and decreased TIMP-1, TNF-?, and TGF- ?1.Item Influence of Insulin Resistance on Contractile Activity-Induced Anabolic Response of Skeletal Muscle(2011-02-22) Nilsson, Mats I.Although the long-term therapeutic benefits of exercise are indisputable, contractile activity may induce divergent adaptations in insulin-resistant vs. insulin-sensitive skeletal muscle. The purpose of this study was to elucidate if the anabolic response following resistance exercise (RE) is altered in myocellular sub-fractions in the face of insulin resistance. Lean (Fa/?) and obese (fa/fa) Zucker rats were assigned to sedentary and RE groups and engaged in either cage rest or four lower-body RE sessions over an 8-d period. Despite obese Zucker rats having significantly smaller hindlimb muscles when compared to age-matched lean rats, basal 24-h fractional synthesis rates (FSR) of mixed protein pools were near normal in distally located muscle groups (gastrocnemius, plantaris, and soleus) and even augmented in those located more proximally (P<0.05; quadriceps). Although 2 x 2 ANOVA indicated a significant main effect of phenotype on mixed FSR in gastrocnemius and soleus (P < 0.05), phenotypic differences were partially accounted for by an exercise effect in the lean phenotype. Interestingly, obese rats exhibited a significant suppression of myofibrillar FSR compared to their lean counterparts (P<0.05; gastrocnemius), while synthesis rates of mitochondrial and cytosolic proteins were normal (gastrocnemius and quadriceps), suggesting a mechanism whereby translation of specific mRNA pools encoding for metabolic enzymes may be favored over other transcripts (e.g., contractile proteins) to cope with nutrient excess in the insulin-resistant state. Immunoblotting of the cytosolic fraction in gastrocnemius muscle indicated an augmented phosporylation of eIF4EBP1 (+ 9%) and p70s6k (+85%) in obese vs. lean rats, but a more potent baseline inhibition of polypeptide-chain elongation as evidenced by an increased phospho/total ratio of eEF2 (+78%) in the obese phenotype. Resistance exercise did not improve synthesis rates of myofibrillar, cytosolic, or mitochondrial proteins to the same extent in obese vs. lean rats, suggesting a desensitization to contractile-induced anabolic stimuli in the insulin-resistant state. We conclude that insulin resistance has diverse effects on protein metabolism, which may vary between muscle groups depending on fiber type distribution, location along the proximodistal body axis, and myocellular sub-fraction, and may blunt the anabolic response to voluntary resistance exercise.Item Relationships between psychosocial factors and adherence to diet and exercise in adults with type 2 diabetes: A test of a theoretical model(2007-05-21) Elizabeth Gressle Tovar; Michele Clark, RN, PhD; Susan Weller, PhD; Regina Lederman, RN, PhD; Hoang Nguyen, PhD; Carrie Jo Braden, RN, PhDIntroduction: Cardiovascular disease (CVD) is the leading cause of premature death among people with diabetes. Diet and exercise adherence are\r\nimportant diabetes self management behaviors that can reduce CVD risk; unfortunately, adherence rates are low among diabetics. Improved understanding of psychosocial factors related to diet and exercise adherence among adults with\r\ntype 2 diabetes can improve strategies to reduce CVD morbidity and mortality in this population.\r\n Purpose: 1) Evaluate psychometrics of the Health Beliefs related to Cardiovascular Disease scale (HBCVD) which measures perceived susceptibility to and severity of heart attack or stroke and perceived benefits of and barriers to\r\ndiet and exercise; 2) Explore relationships between selected bio-psychosocial factors and diet and exercise adherence; and 3) Evaluate the ability of a theoretical model integrating the Health Belief Model (HBM) and Stages of Change Model (SOC) to explain diet and exercise adherence.\r\n Methods: The study design was a descriptive correlational cross section using a convenience sample of 212 adults with type 2 diabetes who completed a series of questionnaires measuring study variables. Outcome variables measured were diet and exercise adherence scores. Predictor/independent variables included knowledge related to CVD risk, cues to action, health beliefs, stage of change, social support, depression, comorbidity, diabetes duration, and\r\nsocioeconomic status. Relationships among model variables were explored using analysis of variance and simple and multiple regression techniques.\r\n Results: The HBCVD demonstrated evidence of validity and reliability, although an improved barriers subscale is recommended. The theoretical model was not supported, although significant paths between model variables were identified. The best model to predict diet included diet stage, susceptibility, self efficacy, social support, and age. The best model to predict exercise included\r\nexercise stage, self efficacy, and social support. Models including HBM and SOC provided greater explanatory power for diet and exercise adherence than either model alone. Susceptibility, barriers, and self efficacy varied significantly across\r\nstages of change. Significant group differences were found among model variables. Participants with depressive symptoms and the least education had lower diet and exercise adherence scores. Younger age and unemployment were also associated with lower diet adherence.\r\nItem Strong Body, Strong Mind: The Effects of Implementing Physical Activity within a Mathematics Course for Deployed Sailors(2012-12-06) Edwards, Joshua 1976-Test anxiety can act as a major inhibitor for students to perform to their ability. Students can find that what life decisions they are going to be afforded is going to be determined by a series of multiple choice mathematics questions. There must be a way to deal with their test anxiety so that the true nature of their knowledge is displayed, and in the process promote learning. Meditative breathing, stretching, and physical activity have been shown to reduce stress. Furthermore, physical activity has also shown an effect on behavioral and cognitive states. This study investigates if these activities can be used in the classroom to promote learning and achievement within a mathematics course. In order to find students who share a minimum level of physical fitness and operate under some of the most stressful conditions possible, the participants were chosen from mathematics courses taught to sailors while on deployment. Two same class ships were chosen to be a part of the study. Each ship had courses split into exercise groups and a control group. Students were given a pre-test followed by eight weeks of instruction and then a post-test, interview data was collected after the course. During the instruction, weekly reviews were set so control groups were rewarded with points for correct answers and exercise groups were tasked with physical activity for incorrect answers. Study A found that post test scores were not significantly different between the exercise and control group. However, the exercise group did attend more tutoring events than their counterparts. Interview data did indicate students in the exercise group felt a greater sense of engagement, fun, and camaraderie. Based upon variations in mathematic exposure between the two groups another study was planned to find participant groups that were closer reflections of each other. Study B was conducted with a more reflective representation of student math background. The results found that the exercise group scored higher in post-test and tutoring events than the control group. Interview data also showed consistent results with Study A, where the exercise group reported a greater sense of engagement, fun and camaraderie.Item The Effect of Dietary Starch Concentration on Glycogen Replenishment in Performance Horses(2013-12-12) Vonderohe, CaitlinFour Quarter Horses (2 to 3 yr; 401 to 432 kg BW) were used in a simple crossover design for a 49-d study to determine the effect of dietary starch levels on post-exercise glycogen replenishment. Horses were fed either high starch (HS) or low starch (LS) concentrates at 0.75% BW/d plus l.0% BW/d Coastal Bermudagrass hay for 14 d, and then worked to fatigue in a standardized exercise test (SET). After a 14-d washout period, horses were switched to the opposite diet for 14 d and then again performed the SET. The LS and HS concentrates were commercially available feeds. Total diets provided an average of 997.6 g of starch and 553.7 g of starch/d in the HS and LS diets, respectively. Throughout the trial, horses were lightly exercised for 30 min, 3 d/wk. The SET consisted of a 30-min warm-up period at a brisk trot in a panel exerciser, followed by 27 min of gradually ascending high-intensity work on a treadmill. Skeletal muscle biopsies were taken from the biceps femoris at rest, immediately after the SET, and again at 6-, 24- and 48-h post-exercise. Samples were flash frozen in liquid nitrogen and stored at -80?C until analysis for later muscle glycogen concentration using a commercial kit. Venous blood samples were taken at rest, immediately post exercise and every 15 min for 3 h post-exercise. Blood samples were analyzed for lactate, glucose, total protein and Ca concentration. Data were analyzed using Proc Mixed (SAS) procedure with main effects of sample time, horse, period, trt and time x trt interaction. Horses on the HS diet had a higher muscle glycogen concentration (P <0.05) at 48 h post exercise than the LS horses (18.1 vs. 10.6 ?g/mg wet wt). At 6 h, HS horses had a more rapid rate of repletion, as observed by the higher glycogen concentration (P<0.05) compared to the immediate post-exercise samples (15.4 vs. 7.9 ?g/mg wet wt); whereas, the LS horses did not return to normal levels until 24 h post SET. Results indicated that horses on the LS diet, which is representative of low-starch feeding programs commonly observed in the industry, replenish their skeletal muscle glycogen slower than horses on the HS diet. Based on this study, performance horses undergoing multiple bouts of intense exercise may benefit physiologically from receiving diets that contain more than 553.7 g of starch/day.Item Thermoregulation of the testicle in response to exercise and subsequent effects on seminal characteristics in stallions(2012-07-16) Mawyer, Jeannette DianeStudies performed on stallions have characterized detrimental effects on semen quality resulting from thermal stress by testicular insulation, but few have investigated the effects of exercise-induced increases in core body temperature on stallion semen parameters. To our knowledge, this is the first study that correlates subcutaneous scrotal temperature and stallion spermatozoa quality using a subdermal scrotal thermal sensory device. Stallions were assigned to a non-exercised (non-ex; control; n=4) or exercised (ex; n=4) group. A motorized equine exerciser was used to work stallions 30 min/d for 4 d/wk during a 12-wk period from July through October. Temperatures (subcutaneous scrotal, subcutaneous neck, rectal, and ambient) were recorded before exercise, immediately after exercise, and 60 and 120 min post-exercise. Humidity data were obtained later to determine THI. No deleterious effects were observed from implantation of thermal sensory devices. An interaction of treatment and time (P < 0.0001) was evident for rectal and neck temperatures. The relationship between scrotal and rectal temperatures was highest (rs =0.761), and other correlations existed between scrotal, neck, and ambient temperatures, as well. Mean rectal temperature in the ex group increased 1.9?C (P < 0.0001), while there was a slight increase in scrotal temperature of 0.8?C (P > 0.05) from 0 min to 22 min. Although an increase in core body temperature was successfully induced by exercise protocol, scrotal temperatures were not significantly affected, and no treatment effects were found in any of the semen parameters measured (P > 0.05). Therefore, no significant changes in fresh or cooled semen parameters resulted from exercise or increases in core body temperature resulting from exercise protocol used in this study. Results of this study indicate that thermal sensory devices are a safe and effective way to measure subcutaneous scrotal and neck temperatures. Although an increase in core body temperature was successfully induced by exercise protocol, scrotal temperatures were not significantly affected, indicating efficient thermoregulation of the testes by the scrotum. Since the testes experienced no significant thermal insult during the exercise protocol, no significant changes in fresh or cooled semen parameters were evident as a result of exercise or elevated core temperature.