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- Resistance Training in Older Adults: The Importance of Volume and Movement VelocityPublication . Marques, Diogo Luís Sequeira Torgal; Marques, Mário António Cardoso; Neiva, Henrique PereiraIn the last decade, the prescription of resistance training (RT) volume based on monitoring the intra-set velocity loss (VL) in sportsmen has assumed great prominence among coaches and researchers. Nevertheless, to date, its applicability and efficacy in optimizing muscle and functional gains in older adults are unknown. Therefore, the general aim of the thesis was to analyze the effects of manipulating the RT volume through monitoring VL on strength, power, and functional capacity in older adults. As such, the following steps were adopted: i) review of the effects of single vs. multiple sets on muscular and functional adaptations in middle-aged and older adults; ii) comparison of the acute effects of low vs. high RT volume on physiological and neuromuscular parameters in older adults; iii) analysis of the effects of RT with 20% VL on strength, power, and functional capacity in older adults; iv) analysis of the effects of RT with 10% VL on strength, power, and functional capacity in older adults; v) analysis of the load-velocity-power relationship in resistance exercises in older adults; vi) comparison of the effects of 10 weeks of RT with 10% vs. 20% VL on strength, power, and functional capacity in older adults. The main results indicated: i) multiple sets induce greater muscular and functional gains than single sets; ii) high volume produces greater acute physiological and neuromuscular stress than low volume; iii) 10% and 20% VL induce strength, power, and functional capacity gains in older adults; iv) load-velocity regression equations allow estimating with high accuracy the training load in older adults; v) 10% VL is more efficient to induce muscular and functional gains than 20% VL since it needs less training volume; however, 20% VL appears to be necessary to optimize gains. Therefore, the results of the thesis suggest that manipulating the RT volume based on monitoring VL presents itself as an effective and efficient approach to improving strength, power, and functional capacity in older adults. Future studies should follow the defined research lines to strengthen the knowledge on this topic.