Is Germany on track to achieve 2030 climate and energy targets?
AbstractIt is unclear how CO2 emissions in the German electricity sector will develop until 2030. On the one hand, the amendment in the Climate Change Act (as of August 2021) aims to tighten the emission reduction targets, fostering the pathway towards a  decarbonised energy system. On the other hand, the complex interplay between the main instruments used to mitigate carbon emissions, fuel prices and the latest energy scarcity as a result of Russia’s war in Ukraine generates pressure for increased emissions.Using an energy system model parametrised to reflect the 2021 energy market situation i.e., before Russia ’s a...
Source: European Journal of Applied Physiology - March 8, 2024 Category: Physiology Source Type: research

Glucose ingestion before and after resistance training sessions does not augment ribosome biogenesis in healthy moderately trained young adults
ConclusionGlucose ingestion before and after resistance training sessions did not augment ribosomal RNA accumulation during twelve days of heavy-load resistance training in moderately trained young adults. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 8, 2024 Category: Physiology Source Type: research

New Zealand blackcurrant extract modulates the heat shock response in men during exercise in hot ambient conditions
Conclusion7d of NZBC extract supplementation increased eHSP32 and PBMC HSP32 content. It also increased inflammatory and apoptotic markers in PBMC, suggesting that NZBC  supports the putative inflammatory response that accompanies exertional-heat stress. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 7, 2024 Category: Physiology Source Type: research

Acute ingestion of Ibuprofen does not influence the release of IL-6 or improve self-paced exercise in the heat despite altering cortical activity
AbstractThe present study tested the hypothesis that ingesting 800  mg Ibuprofen prior to self-paced cycling at a fixed rating of perceived exertion (RPE) improves performance by attenuating the release of Interleukin (IL)-6 and its signalling molecules, whilst simultaneously modulating cortical activity and cerebral oxygenation to the brain. Eight healthy, recrea tionally active males ingested 800 mg Ibuprofen or a placebo ~ 1 h prior to performing fixed RPE cycling for 60 min in 35 °C and 60% relative humidity at an intensity of hard to very hard (RPE = 16) with intermittent maximal (RPE = 20) sprints e...
Source: European Journal of Applied Physiology - March 6, 2024 Category: Physiology Source Type: research

Hypoxia matters: comparison of external and internal training load markers during an 8-week resistance training program in normoxia, normobaric hypoxia and hypobaric hypoxia
ConclusionIt seems that 8  weeks of intermittent RT in hypoxic environments could maximize time-efficiency when aiming to improve strength levels in back squat without evoking higher levels of physiological stress. Performing RT at hypobaric hypoxia may improve the cardiorespiratory response, which in turn could speed recovery. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 6, 2024 Category: Physiology Source Type: research

GH and IGF-1 in skin interstitial fluid and blood are associated with heat loss responses in exercising young adults
Conclusion(1) Exercise increases GH and IGF-1 levels in the skin interstitial fluid, (2) exercise-induced sweating is associated with baseline GH in skin interstitial fluid and blood, as well as exercise-induced increases in blood GH and IGF-1, and (3) cutaneous vasodilation during exercise is not associated with GH and IGF-1 in skin interstitial fluid and blood. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 6, 2024 Category: Physiology Source Type: research

Sex differences in fatiguability during single-joint resistance exercise in a resistance-trained population
AbstractThe primary aim of this study was to compare the fatiguability and acute recovery from a session of unilateral biceps curl exercise between habitually resistance-trained males and females. Twenty participants performed biceps curl one repetition maximum (1RM) and maximal voluntary contraction (MVC) testing of the elbow flexors. The exercise protocol consisted of four sets of unilateral biceps curls at 50% of the measured 1RM to volitional failure. MVC force and EMG activity of the elbow flexors were assessed following each set and during the recovery phase. The outcome variables compare the repetition volume, MVC s...
Source: European Journal of Applied Physiology - March 5, 2024 Category: Physiology Source Type: research

The interaction of breath holding and muscle mechanoreflex on cardiovascular responses in breath-hold divers and non-breath-hold divers
AbstractCardiovascular responses to diving are characterized by two opposing responses: tachycardia resulting from exercise and bradycardia resulting from the apnea. The convergence of bradycardia and tachycardia may determine the cardiovascular responses to diving. The purpose of this study was to investigate the interaction of breath holding and muscle mechanoreflex on cardiovascular responses in breath-hold divers (BHDs) and non-BHDs. We compared the cardiovascular responses to combined apnea and the mechanoreflex in BHDs and non-BHDs. All participants undertook three trials —apnea, passive leg cycling (PLC), and comb...
Source: European Journal of Applied Physiology - March 5, 2024 Category: Physiology Source Type: research

Cortical and spinal responses to short-term strength training and detraining in young and older adults in rectus femoris muscle
ConclusionHigher aMT and MEP amplitude in older adults were concomitant with lower baseline strength. Training increased strength in both groups, but divergent modifications in cortico-spinal activity occurred. Results suggest that the primary locus of adaptation occurs at the spinal level. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 5, 2024 Category: Physiology Source Type: research

Effect of blood flow restriction and electrical muscle stimulation on human glycemic response to a glucose challenge
ConclusionReducing tissue oxygen availability with BFR did not augment the effects of EMS in the overall group; however, we provide preliminary data to suggest possible sex and/or muscle phenotypic responses in glycemic regulation with these modalities. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 5, 2024 Category: Physiology Source Type: research

Substrate utilization and durability during prolonged intermittent exercise in elite road cyclists
ConclusionPPO and MPO6  min were reduced following prolonged intermittent cycling, but the magnitude of these reductions could not be predicted from laboratory measures obtained in the fresh condition. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 5, 2024 Category: Physiology Source Type: research

A century of exercise physiology: key concepts in neural control of the circulation
AbstractEarly in the twentieth century, Walter B. Cannon (1871 –1945) introduced his overarching hypothesis of “homeostasis ” (Cannon 1932) —the ability to sustain physiological values within a narrow range necessary for life during periods of stress. Physical exercise represents a stress in which motor, respiratory and cardiovascular systems must be integrated across a range of metabolic stress to match oxygen delivery to oxygen need at the cellular level, together with appropriate thermoregulatory control, blood pressure adjustments and energy provision. Of these, blood pressure regulation is a complex but contro...
Source: European Journal of Applied Physiology - March 5, 2024 Category: Physiology Source Type: research

Voluntary activation of human knee extensors during isotonic shortening contractions
ConclusionsThe ITT is a valid approach to evaluate voluntary activation during an isotonic contraction using a modified dynamometer. Participants were able to achieve a similar high level of voluntary activation during isometric and isotonic contractions. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 4, 2024 Category: Physiology Source Type: research

Impact of curcumin supplementation on exercise performance and muscle damage after a soccer match: a double-blind placebo-controlled cross-over study
ConclusionThese findings indicate that ingesting 180  mg/day of curcumin may not expedite recovery from muscle damage elicited by soccer matches in collegiate soccer players. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 4, 2024 Category: Physiology Source Type: research

Reliability and validity of the MX3 portable sweat sodium analyser during exercise in warm conditions
ConclusionThe MX3 hydration testing system demonstrated very good single-trial reliability, moderate agreement and a very good CV relative to the Horiba LAQUAtwin-Na-11. To further validate its performance, the MX3 hydration testing system should be compared with analytical techniques known for superior reliability and validity. (Source: European Journal of Applied Physiology)
Source: European Journal of Applied Physiology - March 2, 2024 Category: Physiology Source Type: research