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The purpose of this study was to investigate effects of concurrent and independent administration of dietary nitrate (NO3−), administered as NO3–-rich beetroot juice (BR; ~12.4 mmol of NO3−), and N-acetylcysteine (NAC; 70 mg·kg−1) on physiological responses during prolonged exercise and subsequent high-intensity exercise tolerance. Sixteen recreationally active males supplemented with NO3–-depleted beetroot juice (PL) or BR for 6 days and ingested an acute dose of NAC or maltodextrin (MAL) 1 h prior to performing 1 h of heavy-intensity cycling exercise immediately followed by a severe-intensity time-to-exhaustion (TTE) test in four conditions: 1) PL+MAL, 2) PL+NAC, 3) BR+MAL and 4) BR+NAC. Pre-exercise plasma [NO3−] and nitrite ([NO2−]) were elevated following BR+NAC and BR+MAL (both P < 0.01) compared with PL+NAC and PL+MAL; plasma [cysteine] was increased in PL+NAC and BR+NAC (both P < 0.01) compared to PL+MAL. Muscle excitability declined over time during the prolonged cycling bout in all conditions but was better preserved in PL+NAC compared to BR+NAC (P < 0.01) and PL+MAL (P < 0.05). There was no effect of supplementation on subsequent TTE. These findings indicate that co-ingestion of BR and NAC does not appreciably alter physiological responses during prolonged heavy-intensity cycling or enhance subsequent exercise tolerance. [ABSTRACT FROM AUTHOR]

Purpose: To determine the accuracy of critical power (CP) and Wʹ (the curvature constant of the power-duration relationship) derived from self-paced time-trial (TT) prediction trials using mobile power meters to predict 16.1-km road cycling TT performance. This study also aimed to assess the agreement between functional threshold power (FTP) and CP. Methods: Twelve competitive male cyclists completed an incremental test to exhaustion, a FTP test and 4-5 self-paced TT bouts on a stationary bike within the lab, and a 16.1 km road TT, using mobile power meters. Results: CP and Wʹ derived from the power-duration relationship closely predicted TT performance. The 16.1-km road TT completion time (26.7 ± 2.2 min) was not significantly different from and was significantly correlated with the predicted time-to-completion (27.5 ± 3.3 min, r = 0.89, P < 0.01). CP and FTP were not significantly different (275 ± 40 W vs. 278 ± 42 W, P > 0.05); however, the limits of agreement between CP and FTP were 30 to -36 W. Discussion: The findings of this study indicate that CP and Wʹ determined using mobile power meters during maximal, self-paced TT prediction trials can be used to accurately predict 16.1-km cycling performance, supporting the application of the CP and Wʹ for performance prediction. However, the limits of agreement were too large to consider FTP and CP interchangeable. [ABSTRACT FROM AUTHOR]

Indigenous epistemologies view a person as a whole, interconnected to land, in relationship to others. Knowledge is subjective and collective. However, hegemonic western knowledge created dualism that are perpetuated through western schooling with detrimental effects on Indigenous knowledge systems and livelihood. The dualisms separate mind from body, body from nature, and spirit from matter which led to western schooling practices that support goals of settler colonialism including dispossession of Indigenous peoples from their lands. This article presents theoretical and conceptual discussions, personal reflections, and relationship-building the authors engaged while creating decolonizing and Indigenous syllabi in the fields of environmental studies, philosophy, and mathematics education at the university level. Engaging these processes disrupts the separation created through western dualisms and move toward reconnection as an initial step in creating decolonizing curricula, shifting dominant curricula organized through the logics of settler colonialism, to curricula that envision and support Indigenous nations and sovereignty. [ABSTRACT FROM AUTHOR]