Fernando Campos

H.L.A. Hart’s legal positivism identifies the rule of recognition as the foundational concept grounding a legal system, emphasizing its basis in social practice rather than moral evaluation. Hart argues for a strict conceptual separation between law and morality, allowing the rule of recognition to neutrally establish criteria for legal validity. Nevertheless, debate surrounds whether this rule inherently creates obligations for legal officials. While some scholars, such as Julie Dickson, argue it merely confers powers without imposing duties, others, notably Jules Coleman and Neil MacCormick, insist it necessarily entails obligations – specifically the duty to adhere exclusively to the recognized criteria when identifying valid laws. This obligation arises from officials committed internal acceptance of the rule, ensuring the system’s normative coherence and stability. Thus, despite controversy over its precise characterization, Hart’s conception ultimately presents the rule of recognition as a fundamentally duty-creating social practice essential for any developed legal system.

This article delves into the philosophical theses on law and ethics as presented by Thomas Hobbes and Immanuel Kant, with a focus on the notion of resistance in a legal context. It contrasts Hobbes’ advocacy for nearly unrestricted state authority and a morality closely tied to the state, against Kant’s emphasis on moral law and natural rights as the underpinnings of legality. A pivotal discussion point is Kant’s perceived contradiction in supporting a fundamental right to freedom while limiting the right to resist laws that infringe upon this freedom. By comparing these philosophical authors, the article posits that Kant’s theory of resistance requires integration with his broader ethical views, suggesting that human rights should constrain positive law.

Introduction: The present study aimed to investigate the effects of two high-intensity interval training shuttle-run-based models, over ten weeks on aerobic, anaerobic, and neuromuscular parameters, and the association of the training load and heart rate variability with the change in the measures in young futsal players. Methods: Eleven young male futsal players participated in this study. This pre-post study design was performed during a typical 10 weeks training period. HIIT sessions were conducted at 86% and 100% of peak speed of the FIET. Additionally, friendly and official matches, technical-tactical and strength-power training sessions were performed. Before and after the training period, all players performed the FIET, treadmill incremental, repeated sprint ability, sprint 15-m, and vertical jump tests, and the HRV was measured. Training load was monitored using the session rating of perceived effort. Data analysis was carried out using Bayesian inference methods. Results: The HIIT86 model showed clear improvements for the peak oxygen uptake, peak speed in the treadmill incremental test, first and second ventilatory thresholds, RSA best and mean times, CMJ, and SJ. The HIIT100 model presented distinct advances in VO2peak, peak speed in the treadmill incremental test, RSA mean time, and CMJ. Between HIIT models comparisons showed more favorable probabilities of improvement for HIIT86 than HIIT100 model in all parameters. TL data and HIIT models strongly explained the changes in the RSA mean and best times, as well as HRV changes, and HIIT models explained positively VO2peak changes. All other changes in the parameters were low to moderately explained. Conclusion: The HIIT86 proved to be more effective for improving aerobic, RSA, and neuromuscular parameters than HIIT100 during a typical 10-week futsal training period. So, strength and conditioning specialists prescribing shuttle-run intermittent exercises at submaximal intensities can manage the individual acceleration load imposed on athlete increasing or decreasing either the set duration or the frequency of change of direction during HIIT programming.