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Thirty\u2010seven adults participated in one of the following 8\u2010week interventions: vigorous intensity continuous training (VICT; 28\u2009min at 70% of peak oxygen uptake [VO<jats:sub>2<\/jats:sub>peak]), long interval high intensity interval training (LI\u2010HIIT; 6\u2009\u00d7\u20092\u2009min at 85% VO<jats:sub>2<\/jats:sub>peak), or short interval HIIT (SI\u2010HIIT; 12\u2009\u00d7\u200930\u2009s at 125% maximal power output). Heart rate (HR) and rating of perceived exertion (RPE) were measured during sessions. Pre\u2010 and post\u2010intervention assessments included fat and lean mass, cardiopulmonary exercise testing, knee extensors maximal isometric torque, voluntary activation, and endurance during a submaximal contraction. Compared to SI\u2010HIIT and VICT, LI\u2010HIIT sessions were characterized by a shorter duration, a similar time spent above 90% HR<jats:sub>max<\/jats:sub>, but a higher RPE (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). VO<jats:sub>2<\/jats:sub>peak and muscle endurance increased respectively by 14% and 12%, while knee extensors torque, voluntary activation, and lean mass increased to a lesser extent (1%\u20133%) after the interventions (ANOVA time\u2010effect, all <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). There was no significant difference between the modalities (intervention\u2009\u00d7\u2009time interaction, all <jats:italic>p<\/jats:italic>\u2009&gt;\u20090.05). In conclusion, comparable body composition, cardiorespiratory, and neuromuscular adaptations were induced by the three high intensity training protocols, while RPE was higher during LI\u2010HIIT sessions.<\/jats:p>","DOI":"10.14814\/phy2.70306","type":"journal-article","created":{"date-parts":[[2025,4,4]],"date-time":"2025-04-04T01:15:12Z","timestamp":1743729312000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Comparison of body composition, cardiorespiratory, and neuromuscular adaptations induced by three different high intensity training protocols"],"prefix":"10.14814","volume":"13","author":[{"given":"Corentin","family":"Scoubeau","sequence":"first","affiliation":[{"name":"Cardio\u2010Pulmonary Exercise Laboratory Faculty of Human Motor Sciences, Universit\u00e9 Libre de Bruxelles  Brussels 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