Impact of low-volume concurrent strength training distribution on muscular adaptation
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Impact of low-volume concurrent strength training distribution on muscular adaptation. / Kilen, Anders; Bay, Jonathan; Bejder, Jacob; Andersen, Andreas Breenfeldt; Bonne, Thomas Christian; Larsen, Pernille Dyeremose; Carlsen, Andreas; Egelund, Jon; Nybo, Lars; Mackey, Abigail Louise; Olsen, Niels Vidiendal; Aachmann-Andersen, Niels Jacob; Andersen, Jesper Løvind; Nordsborg, Nikolai Baastrup.
I: Journal of Science and Medicine in Sport, Bind 23, Nr. 10, 2020, s. 999-1004.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Impact of low-volume concurrent strength training distribution on muscular adaptation
AU - Kilen, Anders
AU - Bay, Jonathan
AU - Bejder, Jacob
AU - Andersen, Andreas Breenfeldt
AU - Bonne, Thomas Christian
AU - Larsen, Pernille Dyeremose
AU - Carlsen, Andreas
AU - Egelund, Jon
AU - Nybo, Lars
AU - Mackey, Abigail Louise
AU - Olsen, Niels Vidiendal
AU - Aachmann-Andersen, Niels Jacob
AU - Andersen, Jesper Løvind
AU - Nordsborg, Nikolai Baastrup
N1 - CURIS 2020 NEXS 112
PY - 2020
Y1 - 2020
N2 - Objectives: Military-, rescue- and law-enforcement personnel require a high physical capacity including muscular strength. The present study hypothesized that 9 weeks of volume matched concurrent short frequent training sessions increases strength more efficiently than less frequent longer training sessions.Design: A randomized training intervention study with functional and physiological tests before and after the intervention.Methods: Military conscripts (n = 290) were assigned to micro-training (four 15-min strength and four 15-min endurance bouts weekly); classical-training (one 60-min strength and one 60-min endurance training session weekly) or a control-group (two 60-min standard military physical training sessions weekly).Results: There were no group difference between micro-training and classical-training in measures of strength. Standing long jump remained similar while shotput performance was reduced (P ≤ 0.001) in all three groups. Pull-up performance increased (P ≤ 0.001) in micro-training (7.4 ± 4.6 vs. 8.5 ± 4.0 repetitions, n = 59) and classical-training (5.7 ± 4.1 vs. 7.1 ± 4.2 repetitions, n = 50). Knee extensor MVC increased (P ≤ 0.01) in all groups (micro-training, n = 30, 11.5 ± 8.9%; classical-training, n = 24, 8.3 ± 11.5% and control, n = 19, 7.5 ± 11.8%) while elbow flexor and hand grip MVC remained similar. Micro-training increased (P ≤ 0.05) type IIa percentage from 32.5 ± 11.0% to 37.6 ± 12.3% (n = 20) and control-group increased (P ≤ 0.01) type IIax from 4.4 ± 3.0% to 11.6 ± 7.9% (n = 8). In control-group type I, fiber size increased (P ≤ 0.05) from 5121 ± 959 μm to 6481 ± 2084 μm (n = 5). Satellite cell content remained similar in all groups.Conclusions: Weekly distribution of low-volume concurrent training completed as either eight 15-min bouts or two 60-min sessions of which 50% was strength training did not impact strength gains in a real-world setting.
AB - Objectives: Military-, rescue- and law-enforcement personnel require a high physical capacity including muscular strength. The present study hypothesized that 9 weeks of volume matched concurrent short frequent training sessions increases strength more efficiently than less frequent longer training sessions.Design: A randomized training intervention study with functional and physiological tests before and after the intervention.Methods: Military conscripts (n = 290) were assigned to micro-training (four 15-min strength and four 15-min endurance bouts weekly); classical-training (one 60-min strength and one 60-min endurance training session weekly) or a control-group (two 60-min standard military physical training sessions weekly).Results: There were no group difference between micro-training and classical-training in measures of strength. Standing long jump remained similar while shotput performance was reduced (P ≤ 0.001) in all three groups. Pull-up performance increased (P ≤ 0.001) in micro-training (7.4 ± 4.6 vs. 8.5 ± 4.0 repetitions, n = 59) and classical-training (5.7 ± 4.1 vs. 7.1 ± 4.2 repetitions, n = 50). Knee extensor MVC increased (P ≤ 0.01) in all groups (micro-training, n = 30, 11.5 ± 8.9%; classical-training, n = 24, 8.3 ± 11.5% and control, n = 19, 7.5 ± 11.8%) while elbow flexor and hand grip MVC remained similar. Micro-training increased (P ≤ 0.05) type IIa percentage from 32.5 ± 11.0% to 37.6 ± 12.3% (n = 20) and control-group increased (P ≤ 0.01) type IIax from 4.4 ± 3.0% to 11.6 ± 7.9% (n = 8). In control-group type I, fiber size increased (P ≤ 0.05) from 5121 ± 959 μm to 6481 ± 2084 μm (n = 5). Satellite cell content remained similar in all groups.Conclusions: Weekly distribution of low-volume concurrent training completed as either eight 15-min bouts or two 60-min sessions of which 50% was strength training did not impact strength gains in a real-world setting.
KW - Faculty of Science
KW - Muscle biopsies
KW - Military
KW - Muscle fiber composition and size
KW - Satellite cells
U2 - 10.1016/j.jsams.2020.03.013
DO - 10.1016/j.jsams.2020.03.013
M3 - Journal article
C2 - 32371120
VL - 23
SP - 999
EP - 1004
JO - Journal of Science and Medicine in Sport
JF - Journal of Science and Medicine in Sport
SN - 1440-2440
IS - 10
ER -
ID: 239121821