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Articles 1 - 5 of 5
Full-Text Articles in Life Sciences
Acute Testosterone Responses To Different Resistance Exercise Intensities, Robert Rietjens
Acute Testosterone Responses To Different Resistance Exercise Intensities, Robert Rietjens
UNLV Theses, Dissertations, Professional Papers, and Capstones
We investigated the acute testosterone response to four different resistance-training protocols. We observed testosterone levels pre-workout, immediately post-workout, and 60-minutes post-workout following a bout of upper body exercise at 70%,1 RM, 90% 1 RM, and lower body exercise at 70% 1 RM and 90% 1 RM. Total training volume was held constant but all amount of weight, sets, and reps were different. 10 healthy, male, resistance trained individuals volunteered for the study. The performed each exercise condition on separate days. Capillary blood was taken via finger prick at the time points specified above. Blood samples were analyzed via Accubind Testosterone …
Salivary Alpha-Amylase As An Indicator Of Body Stress Following An Acute Session Of Repetitive Jumping, Shaelee Allen
Salivary Alpha-Amylase As An Indicator Of Body Stress Following An Acute Session Of Repetitive Jumping, Shaelee Allen
UNLV Theses, Dissertations, Professional Papers, and Capstones
Determining body stress levels is important when developing training programs for athletes and rehab facilities. Stress levels during exercise are commonly measured using heart rate, oxygen consumption (VO2), and blood biomarkers. These collection measures involve training on the part of the data collector and the participant, are invasive, and themselves elicit some stress. The purpose of this study is to test whether a 10-min repetitive jumping session will cause a significant increase in salivary alpha-amylase, a potential stress biomarker. This study also looks to determine if a 20-min recovery is enough time for amylase levels to return to …
Life History Tradeoffs And The Costs Of Reproduction In Arizona Bark Scorpions (Centruroides Sculpturatus), Michael Marie Webber
Life History Tradeoffs And The Costs Of Reproduction In Arizona Bark Scorpions (Centruroides Sculpturatus), Michael Marie Webber
UNLV Theses, Dissertations, Professional Papers, and Capstones
Tradeoffs in life history evolution result from conflicts in the time and energy that can be simultaneously invested in activities such as growth, reproduction, and survival. Reproduction is an energetically costly activity for organisms, and is known to elicit alterations in the daily activity patterns of individuals. I investigated reproductive tradeoffs in the Arizona Bark Scorpion,Centruroides sculpturatus. To better understand the nature of tradeoffs in this species, I examined the influence of reproductive state on the predatory efficiency and thermal preference of reproductive females. Further, I examined the influence of reproductive activities (i.e. gestation) on the ability of reproductive females …
The Grass Shrimp, Palaemonetes, Pugio: Hypoxic Influences On Embryonic Development, Christensen C. Javier
The Grass Shrimp, Palaemonetes, Pugio: Hypoxic Influences On Embryonic Development, Christensen C. Javier
UNLV Theses, Dissertations, Professional Papers, and Capstones
Grass shrimp,Palaemonetes pugio, can survive in brackish waters and estuarine ecosystems despite the frequent oscillations and fluctuations in salinity, temperature and oxygen. AdultP. pugiohave the ability to osmoregulate (Romney and Reiber 2011), change cardiac parameters to tolerate temperatures (not yet published, Mika and Reiber) and oxyregulate (Guadagnoli and Reiber 2013). Manipulation of cardiac parameters allows for these methods of regulation. However, cardiac contraction and internal convection of oxygen do not occur until later stages of embryonic development. Studies focused on these morphological and physiological advantages may provide further understanding of the regulatory mechanisms within grass shrimp embryos, larvae and adults. …
Understanding How Honey Bee Flight And Senescence Are Connected Through Oxidative Stress., Joseph Margotta
Understanding How Honey Bee Flight And Senescence Are Connected Through Oxidative Stress., Joseph Margotta
UNLV Theses, Dissertations, Professional Papers, and Capstones
The goal of this dissertation was to exploit the tractability of the honey bee (Apis mellifera) to understand how the physiological and cellular mechanisms that determine the onset and duration of senescence are shaped by behavioral development and behavioral intensity. These data reveal how behavior can damage cells and consequently limit lifespan. The honey bee represents the ideal model to address these factors because age, behavior, functional senescence, and lifespan are easily manipulated independently of each other while in its natural environment. I determined if there was a cause-effect relationship between honey bee flight and oxidative stress by comparing damage …