Endurance Training Intensity Does Not Mediate Interference to Maximal Lower-Body Strength Gain during Short-Term Concurrent Training

Abstract

We determined the effect of concurrent training incorporating either high-intensity interval training (HIT) or moderate-intensity continuous training (MICT) on maximal strength, counter-movement jump (CMJ) performance, and body composition adaptations, compared with single-mode resistance training (RT). Twenty-three recreationally-active males (mean ± SD: age, 29.6 ± 5.5 y; trueV˙O2peak, 44 ± 11 mL kg−1·min−1) underwent 8 weeks (3 sessions·wk−1) of either: (1) HIT combined with RT (HIT+RT group, n = 8), (2) work-matched MICT combined with RT (MICT+RT group, n = 7), or (3) RT performed alone (RT group, n = 8). Measures of aerobic capacity, maximal (1-RM) strength, CMJ performance and body composition (DXA) were obtained before (PRE), mid-way (MID), and after (POST) training. Maximal (one-repetition maximum [1-RM]) leg press strength was improved from PRE to POST for RT (mean change ± 90% confidence interval; 38.5 ± 8.5%; effect size [ES] ± 90% confidence interval; 1.26 ± 0.24; P < 0.001), HIT+RT (28.7 ± 5.3%; ES, 1.17 ± 0.19; P < 0.001), and MICT+RT (27.5 ± 4.6%, ES, 0.81 ± 0.12; P < 0.001); however, the magnitude of this change was greater for RT vs. both HIT+RT (7.4 ± 8.7%; ES, 0.40 ± 0.40) and MICT+RT (8.2 ± 9.9%; ES, 0.60 ± 0.45). There were no substantial between-group differences in 1-RM bench press strength gain. RT induced greater changes in peak CMJ force vs. HIT+RT (6.8 ± 4.5%; ES, 0.41 ± 0.28) and MICT+RT (9.9 ± 11.2%; ES, 0.54 ± 0.65), and greater improvements in maximal CMJ rate of force development (RFD) vs. HIT+RT (24.1 ± 26.1%; ES, 0.72 ± 0.88). Lower-body lean mass was similarly increased for RT (4.1 ± 2.0%; ES; 0.33 ± 0.16; P = 0.023) and MICT+RT (3.6 ± 2.4%; ES; 0.45 ± 0.30; P = 0.052); however, this change was attenuated for HIT+RT (1.8 ± 1.6%; ES; 0.13 ± 0.12; P = 0.069). We conclude that concurrent training incorporating either HIT or work-matched MICT similarly attenuates improvements in maximal lower-body strength and indices of CMJ performance compared with RT performed alone. This suggests endurance training intensity is not a critical mediator of interference to maximal strength gain during short-term concurrent training.

Maximal exercise increases mucosal associated invariant T cell frequency and number in healthy young men

“…Expired gases were sampled every 15 s using automated gas analysers (Moxus Modular VO 2 System, AEI Technologies, Pittsburgh, PA, USA) and peak oxygen uptake (VO 2peak ) was determined based on the two highest consecutive 15 s values achieved during the test (Fyfe et al 2016). Gas analyzers were calibrated prior to each test using known gas concentrations (21.0% O 2 and 0.03% CO 2 , 16.0% O 2 and 4.0% CO 2 ).…”

The Empirical Research of Aerobic Endurance Training in Football

“…Foreign related research also confirmed that combined with aerobic ability training of football player special athletic performance has many positive effects [6][7][8][9][10].Get oxygen transport capacity of athletes, the ability to pump the blood of the heart, vo2 Max, running from the game, the sprint frequency and number of the ball has been improved obviously.And thus put forward the judgment of maximum heart rate field test method [11], for the coaches to effectively control training provides a good guidance.…”

Será a combinação dos treinamentos intervalado e resistido mais efetiva sobre a aptidão física em adultos? Uma revisão sistemática e metanálise

“…In studies that used interval training, five used the combination of the HIIT protocol with strength training 21,[23][24][25]28 , while four adopted the SIT principles for combined training 20,22,26,27 . Regarding the methodological quality of studies, one was classified as with low methodological quality 20 , six with medium quality 21,23,24,[26][27][28] and two with high quality 22,25 . Among the interventions used in the comparison with the combined protocol (HIIT / SIT) + RT, three studies adopted HIIT / SIT 22,27,28 seven RT 20,21,23,24,[26][27][28] and two CT + RT 24,25 .…”

“…Among the selected studies, four performed interventions in samples with eutrophic nutritional status [20][21][22][23] and five in overweight populations [24][25][26][27][28] [20][21][22][23][24][25][26] and seven cardiorespiratory fitness, specifically VO 2max in kg / ml / min. 20,22,[24][25][26][27][28] . In studies that used interval training, five used the combination of the HIIT protocol with strength training 21,[23][24][25]28 , while four adopted the SIT principles for combined training 20,22,26,27 .…”

“…20,22,[24][25][26][27][28] . In studies that used interval training, five used the combination of the HIIT protocol with strength training 21,[23][24][25]28 , while four adopted the SIT principles for combined training 20,22,26,27 . Regarding the methodological quality of studies, one was classified as with low methodological quality 20 , six with medium quality 21,23,24,[26][27][28] and two with high quality 22,25 .…”