Durability as an index of endurance exercise performance: Methodological considerations

Experimental Physiology, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Endurance athletes routinely complete physiological assessments to predict performance, inform training programmes and monitor subsequent adaptations. This profiling is typically performed with the athlete in a 'fresh' (i.e., rested) condition, but variables deteriorate during prolonged exercise. Durability has been defined as resilience deterioration of performance or following Herein, we review current approaches measure durability. The construction fatiguing protocol affects durability profiles, greater relative intensity duration resulting more marked baseline measures. design should control for factors that could impact measurements, such nutrition environmental characteristics, ensure outcomes are repeatable can be compared between over time same athlete. selection these parameters based on proposed research question applied context take account status Accordingly, this highlights important considerations protocols practice appropriate.

Language: Английский

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Do heart rates of elite marathon runners exhibit room for drift? Implications for durability

Frontiers in Sports and Active Living, Journal Year: 2025, Volume and Issue: 7

Published: April 14, 2025

Language: Английский

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Integrative Field-Based Health and Performance Research: A Narrative Review on Experimental Methods and Logistics to Conduct Competition and Training Camp Studies in Athletes

Sports Medicine, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Field-based sport research involves studies that collect data from athletes and/or teams during competition their daily training environments. Over the last decade, sport-specific field-based projects have significantly increased in number and complexity, partially owing to further development of more portable measurement equipment (e.g., indirect calorimetry, desktop blood/gas analyzers, laboratories, etc.) wearable or consumable technologies smart watches, sensors, core temp pills, etc.). However, given these rapid advances novelty, challenges remain validity applicability devices. Unfortunately, there are no global ethical best-practice standards for use devices wearables sport; however, this review will outline various opportunities challenges. Many decision trade-offs required when designing balance gold-standard scientific rigor strict control with highly applied, but less-controlled, “real-world” conditions. To our knowledge, narrative reviews take a wholistic view logistical methodological considerations athletes. Accordingly, takes multi-disciplinary approach (physiological, nutritional/energetic, biomechanical, musculoskeletal, cognitive, psychosocial factors), along involved project planning, design, ethics elite teams. We also provide practical guidance characterizing extreme demands support ultimately catalyzes improved understanding limits human capacity. hope can serve as guide researchers undertaking athlete research.

Language: Английский

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Prolonged running reduces speed at the moderate-to-heavy intensity transition without additional reductions due to increased eccentric load

European Journal of Applied Physiology, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Abstract Aim To investigate the impact of prolonged running on speed at moderate-to-heavy intensity transition, and whether increased eccentric load modifies exercise-induced shifts in transition. Methods Twelve endurance-trained runners (4 females, 8 males, peak oxygen uptake 51.5 mL kg −1 min females 56.1 males) participated. Following trials to assess first ventilatory threshold (VT 1 ) a 0% gradient -10% gradient, participants completed two trials: (i) level trial (LVL): 120-min (ii) downhill (DH): with 90-min 6 × 5-min intervals (DH). Running was conducted 90% VT for respective gradients. Speed perceived leg muscle soreness, maximal voluntary isometric knee extensor torque were assessed pre- post-prolonged exercise. Results An effect time observed (∆-6.2 ± 3.6% LVL ∆-7.6 3.2% DH, P < 0.001), no condition (LVL vs. = 0.382), or interaction ( 0.295). Reduced metabolic energy expenditure (metabolic power) significantly contributed reduced both whereas changes economy (energetic efficiency) did not 0.228). Conclusion Prolonged moderate-intensity but this exacerbated by load. transition following primarily attributed decreased power.

Language: Английский

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Durability in Youth Squad Triathletes—Influence of Strenuous Cycling on Subsequent Running Performance, Economy, and Substrate Utilization

International Journal of Sports Physiology and Performance, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 11

Published: Jan. 1, 2025

Purpose : This study aimed to investigate oxygen/energy cost (OC/EC) of running and substrate utilization before after strenuous cycling in well-trained junior triathletes the relevance changes these variables for fatigued performance. Methods Nineteen squad (4 female, 15 male; 17.2 [1.8] y; maximal oxygen uptake ( ) 61.4 [5.1] mL·kg −1 ·min completed 3 submaximal steps (2.8 m·s , +0.4 5 min) under fresh conditions, followed by an incremental test (∼2 W·kg +20 W, exhaustion. Afterward, they performed another exhaustion conditions OC, time-to-exhaustion assessment. During both runs, EC, carbohydrate/fat oxidation (CHO/FO) were assessed. Results Contrary trivial/small average OC (210 [15] 209 [14] ·km P = .71) EC (4.75 [0.33] 4.59 [0.29] kJ·kg .02), CHO decreased (2.96 [0.68] 2.08 g·min while FO increased (0.15 [0.13] 0.48 [0.22] significantly from < .001). Besides r .68, .002), –.60, .01) .67, .003) correlated with time (1715 [172] s). Multiple regression commonality analysis identified change as best model R 2 88%). Conclusion Despite OC/EC running, a pronounced shift was evident triathletes, which also associated

Language: Английский

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