Alejandro M. Rosales

• Master of Science
• PhD Student at University of Montana

Nocturnal oxygen enrichment improves sleep at high-altitude but may impair acclimatization. PURPOSE: Determine if nocturnal oxygen enrichment impacts acclimatization. METHODS: A 7-day acclimatization protocol occurred at a field-based research site between 0-4200m. Participants were housed at 2800m and slept with (O 2 +, 32.3±2.5% O 2 ) or without...

Introduction The development and maintenance of the skeletal muscle is crucial for the support of daily function. Heat, when applied locally, has shown substantial promise in the maintenance of the muscle. The purpose of this study was to determine the combined effects of local heat application and acute resistance exercise on gene expression assoc...

Introduction Capsaicin, a chili pepper extract, can stimulate increased skin blood flow (SkBF) with a perceived warming sensation on application areas. Larger surface area application may exert a more systemic thermoregulatory response. Capsaicin could assist with maintaining heat transport to the distal extremities, minimizing cold weather injury...

Purpose Menthol is known to elicit opposing thermoregulatory and perceptual alterations during intense exercise. The current purpose was to determine the thermoregulatory and perceptual effects of topical menthol application prior to walking in the heat. Methods Twelve participants walked (1.6 m s⁻¹, 5% grade) for 30 min in the heat (38 °C, 60% re...

The development and maintenance of skeletal muscle is crucial for the support of daily function. Recent evidence suggests that genes coded for proteins associated with the human muscle growth program (myogenic and proteolytic genes) are sensitive to local heat application. Therefore, the purpose of this investigation was to determine the effect of...

Post-exercise cooling studies reveal inhibitory effects on markers of skeletal muscle growth. However, the isolated effect of local cold application has not been adequately addressed. It is unclear if the local cold or the combination of local cold and exercise is driving negatively altered skeletal muscle gene expression. The purpose was to determ...

Introduction/Purpose Research has identified two regions within mitochondrial deoxyribonucleic acid (mtDNA), which seem to be more (major arc; mtMAJ) and less (minor arc; mtMIN) prone to oxidation and mtDNA lesion formation. Oxidation of mtDNA base pairs can result in reduced copy number and has been linked to chronic diseases. Interestingly, exerc...

Purpose: Determine if topical capsaicin, a transient receptor potential vanilloid heat thermoreceptor activator, alters thermoregulation and perception when applied topically prior to thermal exercise. Methods: Twelve subjects completed 2 treatments. Subjects walked (1.6 m s− 1, 5% grade) for 30 min in the heat (38 ◦C, 60% relative humidity) with e...

The purpose of this study was to examine the effects of acute normobaric (NH, decreased FiO2) and hypobaric (HH, 4200 m ascent) hypoxia exposures compared to sea level (normobaric normoxia, NN). Tissue oxygenation, cardiovascular, and body fluid variables measured during rest and a 3-min step-test following 90-min exposures (NH, HH, NN). Muscle oxy...

The purpose of this study was to determine the impact of localized cooling of the skeletal muscle during rest on mitochondrial related gene expression. Thermal wraps were applied to the vastus lateralis of each limb of 12 participants. One limb received a cold application (randomized) (COLD), while the other did not (RT). Wraps were removed at the...

Objective: Determine serum lipid and general health/fitness alterations following a 5-month wildfire suppression season. Methods: We recruited 100 wildland firefighters (WLFFs) to a 5-month pre- to post-season observational study. Nude body mass, blood pressure (BP), grip strength, and step-test heart rate (HR) were recorded. Blood samples were...

Background: Previous data have demonstrated that Tour de France riders maintain total daily energy expenditure (TDEE) between 3.5 and 5.5 times the basal metabolic rate (×BMR). In contrast, TDEE for healthy male septuagenarians has been reported to average 1.3 to 2.0 ×BMR. Purpose: Measure the TDEE and water efflux during ultraendurance work in...

Objective: Document wildland firefighters (WLFFs) hydration status during a singular workshift (13.7 ± 1.4 h). Methods: WLFF-researchers documented real-time WLFF (n = 71) urine metrics and fluid consumption. Body weight and blood samples (n = 25) were also collected. Two-tailed dependent t-tests determined statistical significance (p < 0.05)....

Introduction Wildfire suppression is characterized by high total energy expenditure and water turnover rates. Hydration position stands outside hourly fluid intake rates. However, dose interval remains ambiguous. We aimed to determine the effects of microdosing and bolus-dosing water and microdosing and bolus-dosing carbohydrate-electrolyte solutio...

Wildland fire suppression presents a working environment that often exceeds an energy expenditure of 20 MJ/day. However maladaptive seasonal responses in adiposity and blood lipid profiles have been noted. PURPOSE: To determine changes in clinical health metrics and serum lipids resulting from 5 months of seasonal wildland fire suppression. METHODS...

PurposeResearch has elucidated the impact of post-exercise carbohydrate nutrition and environmental conditions on muscle glycogen re-synthesis. However, research has minimally considered the implications of glycogen recovery in females and has mostly focused on commercial sport nutrition products. The purpose of this study was to determine the effe...